Correct Option selected | Wrong Option selected | Correct Option | Open Question | Not Answered |
| 1 | Which of the following statements best explains a key advantage of co-digestion in anaerobic digestion systems? |
| A | It mixes different organic feedstocks to enhance microbial efficiency and increase biogas yield |
| B | It accelerates the combustion of food waste and grease through microbial gasification |
| C | It combines inorganic and organic waste to maximize reactor pressure and increase digestate quality |
| D | It reduces the need for sealed reactors by allowing aerobic breakdown of multiple waste types |
| 2 | What is the decimal equivalent of the hexadecimal number 2A16? |
| A | 3210 |
| B | 4210 |
| C | 5210 |
| D | 6210 |
| 3 | Which semiconductor device is specifically designed to produce electric current when exposed to light? |
| A | Zener diode |
| B | Photodiode |
| C | Tunnel diode |
| D | Varactor diode |
| 4 | What is the primary purpose of earthing in an electrical installation? |
| A | To lower overall power usage |
| B | To maintain the frequency of alternating current supply |
| C | To safely direct fault currents into the ground, minimizing shock hazards |
| D | To boost the voltage level of the system |
| 5 | In a two-part tariff system, the total electricity charges are divided into: |
| A | Maximum demand charges and late payment fees |
| B | Fixed charges and running charges |
| C | Transmission charges and distribution charges |
| D | Energy charges and fuel surcharge |
| 6 | At what condition does a transformer achieve maximum efficiency at a given power factor? |
| A | When iron losses are maximum |
| B | When copper losses are zero |
| C | When iron loss equals copper loss |
| D | When load is at full capacity |
| 7 | Which relay characteristic is commonly used for feeder protection, providing a tripping time inversely proportional to the fault current magnitude? |
| A | Under-voltage |
| B | Definite time |
| C | Inverse Definite Minimum Time |
| D | Instantaneous |
| 8 | In a digital storage oscilloscope (DSO), which component is primarily used to store the digital copy of the waveform? |
| A | Capacitor |
| B | Microcontroller ROM |
| C | Digital memory |
| D | ADC |
| 9 | A demand charge in an electricity tariff typically reflects: |
| A | The power factor of the load |
| B | The total energy consumed (kWh) |
| C | The maximum power consumed (kW or kVA) during a billing period |
| D | The time of day the energy is consumed |
| 10 | What does a power factor meter directly measure in an AC electrical system? |
| A | The cosine of the phase angle between voltage and current |
| B | The magnitude of active power |
| C | The phase angle between voltage and current |
| D | The magnitude of reactive power |
| 11 | What is the primary purpose of switchgear in a power system? |
| A | Power factor improvement |
| B | Control, protection, and isolation |
| C | Fault detection |
| D | Voltage regulation |
| 12 | Which network theorem allows a complex linear circuit to be replaced by an equivalent voltage source in series with an equivalent resistance? |
| A | Superposition Theorem |
| B | Thevenin's Theorem |
| C | Ohm's Law |
| D | Kirchhoff's Voltage Law |
| 13 | What is the primary function of a single-phase transformer? |
| A | It stores alternating current temporarily in the magnetic core and releases it when needed. |
| B | It converts alternating current into pulsating direct current using electromagnetic induction. |
| C | It transfers alternating current (AC) electrical energy from one circuit to another. |
| D | It generates electrical energy using magnetic rotation between two coils. |
| 14 | In a buck-boost converter, what is the primary purpose of the series inductor? |
| A | To limit the short-circuit current. |
| B | To smooth the output voltage ripple. |
| C | To block reverse current flow. |
| D | To store energy when the switch is ON and transfer it to the load when the switch is OFF. |
| 15 | What is the primary role of the CPU in a Programmable Logic Controller (PLC)? |
| A | Storing the program |
| B | Supplying power to the modules |
| C | Providing input/output interfaces |
| D | Executing the control program |
| 16 | In motor drive systems, what is the main purpose of using dynamic braking with a power electronic converter? |
| A | Reversing the motor's direction of rotation. |
| B | Regenerating power back to the supply. |
| C | Dissipating the motor's kinetic energy as heat in a resistor. |
| D | Reducing the motor's supply voltage to zero. |
| 17 | In a magnetic circuit, what property is analogous to electrical resistance? |
| A | Reluctance |
| B | Magnetomotive force |
| C | Magnetic field strength |
| D | Inductance |
| 18 | Which of the following statements about photovoltaic (PV) systems is correct? |
| A | PV panels generate electricity efficiently even when not facing the sun, due to their automatic solar-tracking mechanisms. |
| B | Inverters are used to convert the direct current (DC) produced by PV cells into alternating current (AC) for general use. |
| C | PV panels store solar energy in batteries for nighttime use without any additional components. |
| D | PV arrays generate alternating current (AC) directly from sunlight using tracking systems. |
| 19 | In a three-phase induction motor, the synchronous speed depends on: |
| A | Rotor resistance and supply voltage |
| B | Number of stator poles and supply frequency |
| C | Rotor inductance and slip |
| D | Stator winding capacitance |
| 20 | A power MOSFET switches a load current of 20 A with a voltage of 400 V. The turn-on and turn-off times are each 200 ns, and the switching frequency is 50 kHz. What is the average switching power loss in the MOSFET? | |
| A | 160 W | |
| B | 120 W | |
| C | 80 W | |
| D | 200 W | |
| Not Answered | ||
| 21 | What is 'creep' error in an energy meter? |
| A | The meter disc rotating backward when power flows out. |
| B | The meter reading being higher than actual consumption under heavy load. |
| C | The meter disc stopping abruptly under full load. |
| D | The meter disc rotating continuously even when no load is connected. |
| 22 | In a substation, which component is used to connect various incoming and outgoing feeders, allowing for flexible power distribution? |
| A | Surge arrester |
| B | Bus-bar |
| C | Circuit breaker |
| D | Step-up transformer |
| 23 | A step-down chopper supplies a load with resistance R=20  from a 200 V DC source. If the duty cycle is 0.5,calculate the average output current. | |
| A | 5 A | |
| B | 15 A | |
| C | 50 A | |
| D | 30 A | |
| Not Answered | ||
| 24 | How many flip-flops are required to design a counter that counts from 0 to 7 (MOD-8)? |
| A | 4 |
| B | 2 |
| C | 8 |
| D | 3 |
| 25 | A high-pass RC filter has R = 100 and C = 10  F. Determine the frequency at which the output voltage is 70.7% of the input. | |
| A | 100.12 Hz | |
| B | 75.22 Hz | |
| C | 159.15 Hz | |
| D | 250.26 Hz | |
| Not Answered | ||
| 26 | For a unity feedback control system with the open-loop transfer function G(s)=K/s(s+a), what is the steady-state error when the input is a unit ramp? |
| A | K/a |
| B | 0 |
| C | 1/K |
| D | a/K |
| 27 | Which method is commonly used to generate electricity directly from solid biomass? |
| A | Nuclear fission |
| B | Electrolysis |
| C | Photovoltaic effect |
| D | Direct Combustion |
| 28 | What is the primary purpose of using pulse width modulation (PWM) in inverter circuits? |
| A | To control the torque of the connected motor |
| B | To regulate the average output voltage |
| C | To control the output frequency |
| D | To increase the conduction angle of diodes |
| 29 | For a first-order system, the time constant ( ) is the time taken for the step response to reach approximately: |
| A | 50% of its final value. |
| B | 36.8% of its final value. |
| C | 63.2% of its final value. |
| D | 100% of its final value. |
| 30 | In a single-phase transformer, which winding is connected to the AC power source? |
| A | Secondary winding |
| B | Tank |
| C | Core |
| D | Primary winding |
| 31 | Which set of two-port network parameters is fully determined by applying short-circuit conditions at the output port? |
| A | Y-parameters |
| B | ABCD-parameters |
| C | Z-parameters |
| D | H-parameters |
| 32 | For a given two-port network with parameters: Z11=10 ,Z12=5 ,Z21=5 ,Z22=20 Find the output voltage when input current is 2 A and output current is 1 A. |
| A | 20 V |
| B | 40 V |
| C | 30 V |
| D | 15 V |
| 33 | What is the primary purpose of an electrical substation? |
| A | To balance the load between residential and industrial zones |
| B | To primarily amplify current for long-distance transmission |
| C | To measure power factor in the transmission line |
| D | To convert, regulate, and distribute electricity at suitable voltage levels |
| 34 | Which of the following devices is not typically used as a protective relay in electrical substations? |
| A | Energy metering relay |
| B | Differential relay |
| C | Distance relay |
| D | Unbalance relay |
| 35 | A 3-phase induction motor is connected to a 60 Hz supply and operates with a slip of 5%. What is the rotor frequency? |
| A | 10 Hz |
| B | 15Hz |
| C | 20 Hz |
| D | 3 Hz |
| 36 | Which of the following devices is a unidirectional device and cannot conduct in reverse bias? |
| A | TRIAC |
| B | SCR |
| C | DIAC |
| D | AC MOSFET |
| 37 | Which law governs the electrochemical equivalent of a substance? |
| A | Joule's Law |
| B | Faraday's First Law |
| C | Ohm's Law |
| D | Lenz's Law |
| 38 | Which of the following is a biotic component of an ecosystem? |
| A | Rocks |
| B | Temperature |
| C | Bacteria |
| D | Air |
| 39 | In a Bode plot, if the phase becomes -180o at  =10 rad/s and gain at that frequency is -6 dB, what is the gain margin? |
| A | 0 dB |
| B | 12 dB |
| C | 6 dB |
| D | -6 dB |
| 40 | In a 3-to-8 line decoder, how many input and output lines are present? |
| A | 3 input lines, 8 output lines |
| B | 8 input lines, 3 output lines |
| C | 3 input lines, 3 output lines |
| D | 8 input lines, 8 output lines |
| 41 | Dielectric strength is defined as: |
| A | Maximum voltage per unit thickness before breakdown |
| B | Minimum voltage required to breakdown an insulator |
| C | Ability to support electrostatic force |
| D | Maximum charge a dielectric can store |
| 42 | For a second-order control system with a damping ratio of 0.2 and a natural frequency of 10 radians per second, what is the approximate value of its resonant frequency, where the system's frequency response peaks? | |
| A | 10.72 rad/s | |
| B | 7.52 rad/s | |
| C | 15.26 rad/s | |
| D | 9.59 rad/s | |
| Not Answered | ||
| 43 | What is the primary advantage of an HRC fuse over a rewirable fuse? |
| A | Easier to replace |
| B | Lower cost |
| C | It can interrupt large fault currents reliably with a well-defined breaking capacity |
| D | Provides earth fault protection |
| 44 | Which of the following is the most appropriate reason for using step-up transformers at generating stations in power transmission systems? |
| A | To step up voltage for local equipment operation |
| B | To step up voltage for improved generator cooling efficiency |
| C | To step up voltage for reducing transmission losses over long distances |
| D | To step up voltage for use in domestic appliances |
| 45 | A magnetic core has a mean length of 50 cm, cross-sectional area of 4 cm2, and relative permeability r = 1000. If a coil of 200 turns carries a current of 1 A, calculate: (a) The reluctance (b) The magnetic flux |
| A | (a) Reluctance = 1.00 x 106 At/Wb, (b) Magnetic Flux = 1.50 x 10-4 Wb |
| B | (a) Reluctance = 8.25 x 105 At/Wb, (b) Magnetic Flux = 4.50 x 10-4 Wb |
| C | (a) Reluctance = 7.50 x 105 At/Wb, (b) Magnetic Flux = 3.00 x 10-4 Wb |
| D | (a) Reluctance = 9.95 x 105 At/Wb, (b) Magnetic Flux = 2.01 x 10-4 Wb |
| 46 | In a TTL circuit, the following voltage levels are given: VOH = 3.5 V VIH(min) = 2.0 V VOL = 0.3 V VIL(max) = 0.8 V What are the noise margins for the HIGH and LOW levels respectively? | |
| A | HIGH: 1.0 V, LOW: 0.4 V | |
| B | HIGH: 1.5 V, LOW: 0.5 V | |
| C | HIGH: 2.5 V, LOW: 0.3 V | |
| D | HIGH: 3.0 V, LOW: 0.8 V | |
| Not Answered | ||
| 47 | An engineer is designing an electromagnet for an industrial lifting device. A coil of 500 turns is wound on a magnetic core with a reluctance of 2 x 104 A/Wb. If a current of 0.5 A flows through the coil, what is the magnetic flux generated in the core? |
| A | 6.25 x 10-3 Wb |
| B | 2.50 x 10-2 Wb |
| C | 5.00 x 10-3 Wb |
| D | 1.25 x 10-2 Wb |
| 48 | In overhead line construction, what is the primary purpose of a strain insulator? |
| A | To support conductors at intermediate poles. |
| B | To withstand horizontal tension at dead ends or sharp corners in the conductors. |
| C | To provide lightning protection. |
| D | To separate conductors from each other. |
| 49 | If the open-loop Bode plot crosses 0 dB at =5 rad/s and the phase at that point is -150o, what is the phase margin? |
| A | -30o |
| B | 90o |
| C | 30o |
| D | 150o |
| 50 | What is the main function of an auto-recloser in an overhead distribution system? |
| A | Automatically closes to restore power after tripping due to faults. |
| B | Automatically switch off a faulty feeder permanently. |
| C | To provide step-down voltage regulation. |
| D | To protect against overvoltage surges. |
| 51 | The rotating magnetic field in a three-phase induction motor is produced by: |
| A | The rotor winding only |
| B | The stator winding only |
| C | A DC excitation source |
| D | Both rotor and stator windings |
| 52 | In which of the following applications are stepper motors primarily used? |
| A | Power plants |
| B | Industrial air compressors |
| C | CNC machines |
| D | Electric water heaters |
| 53 | What does the state-space representation of a control system primarily describe? |
| A | A frequency-domain model only. |
| B | Only the input-output relationship. |
| C | A set of first-order differential equations describing the system's internal states. |
| D | A graphical representation of the system. |
| 54 | A technician is testing a series RLC circuit with an inductor of 50 mH and a capacitor of 0.1 F. To ensure maximum current flow, the circuit must be operated at its resonant frequency. What is the approximate resonant frequency of this circuit? | |
| A | 7.12 kHz | |
| B | 10.6 kHz | |
| C | 1.41 kHz | |
| D | 2.25 kHz | |
| Not Answered | ||
| 55 | Which of the following is not considered a renewable energy source? |
| A | Tidal, wave, hydropower |
| B | Hydro, biomass, ocean |
| C | Coal, oil, natural gas |
| D | Solar, wind, geothermal |
| 56 | Calculate the surge impedance of a transmission line with L = 1 mH/km and C = 0.01 F/km. | |
| A | 200.12 | |
| B | 500.42 | |
| C | 100.56 | |
| D | 316.23 | |
| Not Answered | ||
| 57 | In a closed-loop control system, the primary function of the feedback path is to: |
| A | Isolate the controller from the plant. |
| B | Amplify the input signal. |
| C | Compare the actual output with the desired input and generate an error signal. |
| D | Introduce noise into the system. |
| 58 | Which type of transducer generates an electrical charge or voltage when subjected to mechanical stress or pressure? |
| A | Piezoelectric transducer |
| B | LVDT |
| C | Photoelectric sensor |
| D | Hall Effect sensor |
| 59 | Which component in an overhead distribution line protects equipment from high-voltage surges caused by switching operations or external disturbances? |
| A | Shunt Capacitor |
| B | Voltage Regulator |
| C | Series Reactor |
| D | Lightning Arrester |
| 60 | In a balanced three-phase Delta ( ) connected system, what is the relationship between line voltage/current and phase voltage/current? |
| A | Line voltage is  3 times phase voltage, and line current is equal to phase current. |
| B | Both line voltage and line current are equal to their respective phase values. |
| C | Both line voltage and line current are 3 times their respective phase values. |
| D | Line voltage is equal to phase voltage, and line current is 3 times phase current. |
| 61 | According to IE Rules, a "consumer" is defined as any person who is supplied with electricity for: |
| A | Only domestic purposes. |
| B | His/her own use by a supplier or licensee. |
| C | Resale to others. |
| D | Only industrial purposes. |
| 62 | A transformer has an iron loss of 500 W and full-load copper loss of 500 W. Find the efficiency at full load with output power of 10 kW and unity power factor. |
| A | 75.35% |
| B | 50.75% |
| C | 90.91% |
| D | 80.76% |
| 63 | Which Op-Amp circuit produces an output voltage which is the first derivative of the input signal? |
| A | Differentiator circuit |
| B | Integrator circuit |
| C | Comparator circuit |
| D | Voltage follower |
| 64 | In a single-phase wattmeter, the current coil is connected in _______ with the load, and the pressure (voltage) coil is connected in _______ with the load. |
| A | Parallel, parallel |
| B | Parallel, series |
| C | Series, series |
| D | Series, parallel |
| 65 | Which type of logic family consumes the lowest power, making it suitable for battery-powered devices? |
| A | TTL |
| B | CMOS |
| C | DTL |
| D | ECL |
| 66 | Which of the following instructions is used to load the accumulator directly from a memory location? |
| A | STA |
| B | MVI |
| C | LDA |
| D | JMP |
| 67 | What is the primary objective of insulation coordination in a substation? |
| A | To reduce the total cost of insulation materials. |
| B | To ensure that insulation failures occur at predictable locations. |
| C | To match the insulation levels of different voltage classes. |
| D | To protect devices to ensure the safe operation of the system during adverse voltage conditions. |
| 68 | Which pair of elements are commonly used as intrinsic semiconducting materials? |
| A | Iron and Steel |
| B | Copper and Aluminum |
| C | Glass and Rubber |
| D | Silicon and Germanium |
| 69 | What is the primary function of a ladder diagram in PLC programming? |
| A | Graphical programming language which executes through real time input |
| B | Monitoring capacitor charging and discharging rates |
| C | Physical wiring of electrical machines |
| D | Generating high-frequency PWM signals |
| 70 | How many select lines are required for a 4-to-1 multiplexer? |
| A | 4 |
| B | 1 |
| C | 3 |
| D | 2 |
| 71 | In an AC circuit, power factor is defined as the: |
| A | Product of voltage and current |
| B | Ratio of real power to apparent power |
| C | Ratio of reactance to resistance |
| D | Ratio of peak voltage to RMS voltage |
| 72 | What is the primary function of using the Laplace transform in the analysis of control systems? |
| A | Is only applicable to discrete-time systems |
| B | Simplifies non-linear system analysis |
| C | Converts differential equations into algebraic equations |
| D | Directly provides unsteady-state error |
| 73 | A differential relay primarily operates based on the principle of: |
| A | Under-voltage detection. |
| B | Rate of change of frequency. |
| C | Overcurrent sensing. |
| D | Comparison of currents entering and leaving a protected zone. |
| 74 | In a unity feedback system with forward path gain G(s)=10/s(s+2). What is the closed-loop transfer function? |
| A | 10/(s2+10) |
| B | 10/(s2+2s+10) |
| C | 10s/(s2+2s+10) |
| D | 10/(s2+2s) |
| 75 | What is the standard voltage and frequency used in the Indian railway electric traction system? |
| A | 320 V AC,50 Hz |
| B | 25 kV AC,50 Hz |
| C | 230 V AC,50 Hz |
| D | 11 kV AC,50 Hz |
| 76 | An RC circuit has R = 2 k and C = 2.2 F. What is its time constant? | |
| A | 4.4 s | |
| B | 0.22 s | |
| C | 0.0044 s | |
| D | 0.044 s | |
| Not Answered | ||
| 77 | The term preventive maintenance for electrical machines refers to: |
| A | Replacing parts only when they completely wear out. |
| B | Repairing a machine only after it fails. |
| C | Diagnosing faults after they occur. |
| D | Regularly scheduled inspections and servicing to prevent breakdowns. |
| 78 | Which of the following best describes the working principle of a solar power tower system? |
| A | It converts direct sunlight into electricity using photovoltaic cells placed on a tower. |
| B | It relies on underground heat to generate steam directly. |
| C | It uses flat mirrors called heliostats to reflect sunlight onto a central collector tower. |
| D | It uses wind-driven mirrors to track sunlight and produce electricity. |
| 79 | Which gas is primarily tested during the Dissolved Gas Analysis (DGA) of transformer oil? |
| A | Argon |
| B | Helium |
| C | Xenon |
| D | Hydrogen |
| 80 | In a single-phase AC circuit, what is the real power measured by a wattmeter if the voltage is V, current is I, and the phase angle between them is  ? |
| A | V x I/cos() |
| B | V x I x cos() |
| C | V x I x sin() |
| D | V x I |
| 81 | If the meter constant of an energy meter is 1200 revolutions/kWh, how many revolutions will the disc make for an energy consumption of 0.5 kWh? | |
| A | 2400 revolutions | |
| B | 600 revolutions | |
| C | 300 revolutions | |
| D | 1200 revolutions | |
| Not Answered | ||
| 82 | Which Op-Amp configuration provides a gain greater than or equal to 1, with the output being in phase with the input? |
| A | Inverting amplifier |
| B | Differentiator |
| C | Non-inverting amplifier |
| D | Integrator |
| 83 | In a single-phase half-wave controlled rectifier with a resistive load, which of the following provides a direct method for controlling the average output voltage? |
| A | Firing angle of the thyristor |
| B | Type of load used |
| C | Input voltage frequency |
| D | Load resistance |
| 84 | What is the primary principle behind the operation of an insulation tester (Megohmmeter)? |
| A | It measures AC resistance by applying an alternating voltage |
| B | It calculates inductance by measuring current delay |
| C | It tests voltage drop across a load during operation |
| D | It applies a known DC voltage and measures the current to calculate resistance using Ohm's Law |
| 85 | Which of the following correctly describes a characteristic of the Darrieus wind turbine? |
| A | It employs lift-based aerodynamic forces using curved vertical blades. |
| B | It uses flat horizontal blades mounted perpendicular to the wind direction. |
| C | It relies solely on drag force to rotate its rotor blades. |
| D | It has an inbuilt self-starting mechanism and operates purely on drag. |
| 86 | An engineer is analyzing the step response of a second-order control system used in a robotic arm actuator. The system has a damping ratio of 0.5 and a natural frequency of 4 radians per second. What is the peak time? | |
| A | 0.46 seconds | |
| B | 0.91 seconds | |
| C | 0.32 seconds | |
| D | 0.65 seconds | |
| Not Answered | ||
| 87 | Which technology is commonly used to generate electricity from the rise and fall of ocean tides? |
| A | Wave energy converters |
| B | Salinity gradient power |
| C | Ocean thermal energy conversion (OTEC) |
| D | Tidal Barrage |
| 88 | A fully-controlled full-wave bridge converter is connected to a 230 VRMS AC supply, and the firing angle  is 60o. What is the average output voltage across a purely resistive load? | |
| A | 207.06 V | |
| B | 103.53 V | |
| C | 325.27 V | |
| D | 163.84 V | |
| Not Answered | ||
| 89 | A cyclo-converter is a direct AC-AC converter that can change: |
| A | Both voltage level and frequency |
| B | Only frequency |
| C | Only voltage level |
| D | Power factor only |
| 90 | Which form of renewable energy relies on the Earth's internal heat? |
| A | Hydroelectric energy |
| B | Wind energy |
| C | Geothermal energy |
| D | Solar energy |
| 91 | In which bias mode is a photodiode usually operated for fast response and low capacitance? |
| A | Reverse bias |
| B | Forward bias |
| C | Saturation bias |
| D | Zero bias |
| 92 | Which of the following are major anthropogenic sources of air pollution? |
| A | Emissions from factories and vehicles |
| B | Overuse of renewable energy |
| C | Volcanic eruptions and wildfires |
| D | Sewage and agricultural runoff |
| 93 | What does the transconductance (gm) of a Field-Effect Transistor (FET) represent? |
| A | The overall power gain of the amplifier. |
| B | The ratio of drain-source voltage to drain current. |
| C | The ratio of drain current to gate current. |
| D | The ratio of change in drain current to change in gate-source voltage at constant drain-source voltage. |
| 94 | For a second-order system, if the damping ratio is 1, the system response is: |
| A | Overdamped |
| B | Underdamped |
| C | Undamped |
| D | Critically damped |
| 95 | A dielectric material with a relative permittivity  r=10 is used between the plates of a parallel plate capacitor. The area of the plates is 1 cm2 and the separation between them is 1 mm. What is the capacitance of the capacitor? | |
| A | 0.0885 pF | |
| B | 8.85 pF | |
| C | 0.885 pF | |
| D | 88.5 pF | |
| Not Answered | ||
| 96 | Which unit is commonly used by electricity providers to calculate the cost of electrical energy consumed by a household? |
| A | Kilowatt-hour |
| B | Volt |
| C | Ampere |
| D | Ohm |
| 97 | What is the primary function of insulators in overhead transmission lines? |
| A | Reduces sag in the line |
| B | Increases the conductivity of the line |
| C | Acts as a ground wire |
| D | Provides a safe distance between conductors and support structures |
| 98 | The vertical dip in an overhead line conductor between two supports is known as: |
| A | Skin effect |
| B | Proximity effect |
| C | Corona effect |
| D | Sag |
| 99 | Why is AC voltage stepped up to very high levels for long-distance power transmission? |
| A | High voltage improves the power factor. |
| B | High voltage minimizes current, reducing energy loss in transmission lines. |
| C | High voltage is easier to generate. |
| D | High voltage allows for smaller transmission cables. |
| 00 | According to Indian Electricity Rules, what is the maximum permissible voltage for a "Medium Voltage" (MV) installation? |
| A | Exceeding 250 V but not exceeding 650 V |
| B | Exceeding 33,000 V |
| C | Exceeding 650 V but not exceeding 33,000 V |
| D | Up to 250 V |
| 01 | In a single-phase half-controlled bridge rectifier with an R-L load, what is the main function of the freewheeling diode (FWD)? |
| A | To bypass the input AC supply |
| B | To allow reverse current through the load |
| C | To increase the average output voltage |
| D | To improves the load current waveform and increases the input power factor |
| 02 | Which of the following describes the fundamental operating principle of a permanent magnet moving coil (PMMC) instrument? |
| A | Chemical effect of current |
| B | Electromagnetic effect (motor action) |
| C | Heating effect of current |
| D | Electrostatic effect |
| 03 | Which of the following is an example of an open-loop control system? |
| A | Automatic electric iron |
| B | Air conditioner with thermostat |
| C | Automatic Washing Machine |
| D | DC motor speed control with tachometer feedback |
| 04 | What does the "multidisciplinary nature" of environmental studies imply? |
| A | It focuses on the application of ecological principles in laboratory experiments. |
| B | It integrates knowledge from various fields like science, economics, and sociology to understand environmental problems. |
| C | It involves studying environmental issues strictly from a policy-making perspective. |
| D | It deals mainly with technical engineering solutions to environmental degradation. |
| 05 | Which of the following instruments is specifically designed to record the total electrical energy consumed by a household over time? |
| A | Power factor meter |
| B | Voltmeter |
| C | Energy meter |
| D | Multimeter |
| 06 | A power diode dissipates 15 W of power. The ambient temperature is 35oC, and the maximum junction temperature is 125oC. If the diode junction-to-case resistance is 1.5oC/W, find the required thermal resistance of the heat sink. | |
| A | 4.5 oC/W | |
| B | 3.0 oC/W | |
| C | 6.0 oC/W | |
| D | 2.5 oC/W | |
| Not Answered | ||
| 07 | Which type of core is typically used in high-frequency transformers to minimize eddy current losses? |
| A | Silicon steel core |
| B | Laminated iron core |
| C | Ferrite core |
| D | Nickel alloy core |
| 08 | Which semiconductor device functions as a latching switch, remaining in the ON state after being triggered by a gate pulse, as long as the current stays above a specific threshold? |
| A | Transistor (BJT) |
| B | SCR (Silicon Controlled Rectifier) |
| C | Diac (Diode for Alternating Current) |
| D | LED (Light Emitting Diode) |
| 09 | Which substation equipment is used to interrupt fault current? |
| A | Transformer |
| B | Circuit Breaker |
| C | Isolator |
| D | Lightning Arrester |
| 10 | For proper operation of an NPN BJT in the active region, the emitter-base junction must be _______ and the collector-base junction must be _______. |
| A | Forward-biased, forward-biased |
| B | Reverse-biased, reverse-biased |
| C | Forward-biased, reverse-biased |
| D | Reverse-biased, forward-biased |
| 11 | Which oscilloscope control adjusts the brightness of the trace? |
| A | Time/div |
| B | Focus |
| C | X-gain |
| D | Intensity |
| 12 | What is the purpose of the HLT instruction in 8085 assembly language? |
| A | To perform a high-level transfer. |
| B | To load data into the H-L register pair. |
| C | To halt program execution. |
| D | To enable interrupts. |
| 13 | The dynamic resistance of a forward-biased diode is 5 , and the diode current is 20 mA. What is the small-signal voltage across it? |
| A | 0.05 V |
| B | 1.0 V |
| C | 0.1 V |
| D | 0.2 V |
| 14 | A circuit breaker interrupts a fault current of 25 kA at a system voltage of 11 kV (line-to-line).What is the breaking capacity of the circuit breaker in MVA? | |
| A | 275.2 MVA | |
| B | 476.3 MVA | |
| C | 375.5 MVA | |
| D | 250.2 MVA | |
| Not Answered | ||
| 15 | A moving coil instrument has a torque constant of 0.2 Nm/A and carries 3 A. What is the deflecting torque? | |
| A | 0.2 Nm | |
| B | 0.6 Nm | |
| C | 0.3 Nm | |
| D | 1.2 Nm | |
| Not Answered | ||
| 16 | A current transformer (CT) has a ratio of 1000:5. If the primary (line) current is 800 A, what is the corresponding secondary current? |
| A | 6 A |
| B | 5 A |
| C | 4 A |
| D | 3 A |
| 17 | What is the primary reason why the secondary winding of a current transformer (CT) should never be left open-circuited while the primary winding is energized? |
| A | It causes high voltage across the secondary |
| B | It decreases the magnetic permeability of the CT core |
| C | It prevents the CT from stepping down the voltage properly |
| D | It will damage the primary |
| 18 | A 4-pole DC generator with a wave-wound armature has 400 conductors and rotates at 1500 revolutions per minute. If the magnetic flux per pole is 0.02 Weber, calculate the voltage (EMF) generated by the machine when supplying power to an industrial control system. |
| A | 800 V |
| B | 200 V |
| C | 600 V |
| D | 400 V |
| 19 | The slip of an induction motor is defined as: |
| A | (Ns-Nr)/Ns |
| B | Nr/Ns |
| C | (Ns-Nr)/Nr |
| D | Ns/Nr |
| 20 | What is the primary role of positive feedback in an oscillator circuit? |
| A | It ensures that the feedback signal is in phase with the input signal. |
| B | It reduces distortion in the output waveform. |
| C | It filters out unwanted frequencies from the output. |
| D | It provides a stable and predictable gain. |
| 21 | A semi-controlled bridge rectifier is supplied by 120 VRMS. If the firing angle =60, calculate the average output voltage assuming resistive load. | |
| A | 100 V | |
| B | 81 V | |
| C | 50 V | |
| D | 200 V | |
| Not Answered | ||
| 22 | Which international agreement aims to reduce greenhouse gas emissions? |
| A | Stockholm Declaration |
| B | Montreal Protocol |
| C | Paris Agreement |
| D | Basel Convention |
| 23 | Which material is widely used as insulation in electrical wires and cables due to its flexibility and good insulating properties? |
| A | Silicon Dioxide (SiO2) |
| B | Polyvinyl Chloride(PVC) |
| C | Brass |
| D | Graphite |
| 24 | What is the primary purpose of conducting a Partial Discharge Test on a transformer? |
| A | To evaluate the thermal performance of transformer windings |
| B | To verify the magnetic balance of the transformer core |
| C | To detect insulation defects and assess the condition of insulating material |
| D | To measure core losses under rated load |
| 25 | Which of the following technologies is most primarily used to generate electricity directly from solar energy? |
| A | Solar thermal collectors |
| B | Solar dryers |
| C | Solar heaters |
| D | Photovoltaic (PV) cells |
| 26 | A single-phase transformer with a turns ratio of 10:1 is used to step down the voltage for a residential lighting system. If the primary winding is connected to a 2300 V supply, calculate the secondary voltage. |
| A | 230 V |
| B | 400 V |
| C | 110 V |
| D | 300 V |
| 27 | What is the primary operational characteristic of a full-wave rectifier circuit? |
| A | It uses only one diode for rectification. |
| B | It only allows current flow during the positive half-cycle. |
| C | Its output frequency is the same as the input frequency. |
| D | It provides a positive output for both positive and negative input half-cycles. |
| 28 | What is the main function of an exciter in a synchronous generator? |
| A | To provide DC excitation to the rotor winding |
| B | To provide AC excitation to the rotor winding |
| C | To provide cooling excitation to the generator frame |
| D | To provide high voltage excitation to the stator winding |
| 29 | Why is co-axial winding primarily used in potential transformers? |
| A | To reduce leakage reactance |
| B | To reduce copper losses |
| C | To increase magnetizing current |
| D | To simplify the winding process |
| 30 | Which type of memory element is triggered by a clock pulse and changes its output state only at the rising or falling edge of the clock? |
| A | Latch |
| B | RAM |
| C | Multiplexer |
| D | Flip-flop |
| 31 | What does the term glare refer to in the context of illumination? |
| A | Poor uniformity in light distribution across a space |
| B | Visual sensation caused by excessive and uncontrolled brightness in the field of view |
| C | A sharp difference between bright and dark areas |
| D | A lack of adequate lighting on the working surface |
| 32 | The Boolean expression for a 2-input XOR gate is: |
| A | A + B |
| B | A.B |
| C | A - B |
| D | A  B |
| 33 | If a BJT has a current gain ( ) of 100 and the base current (IB) is 0.2 mA, what will be the approximate collector current (IC) when the transistor operates in the active region? | |
| A | 200 mA | |
| B | 50 mA | |
| C | 20 mA | |
| D | 2 mA | |
| Not Answered | ||
| 34 | What is the primary function of the 8253 programmable chip? |
| A | Managing serial communication |
| B | Controlling direct memory access (DMA) |
| C | Handling interrupt requests |
| D | Generating accurate timing and counting signals |
| 35 | Which component of an ecosystem captures solar energy and converts it into food? |
| A | Producers |
| B | Herbivores |
| C | Carnivores |
| D | Scavengers |
| 36 | A current of 4 A is passed through a copper sulfate solution for 2 hours. If the electrochemical equivalent (ECE) of copper is 3.3x10-5 kg/C, what is the mass of copper deposited at the cathode? | |
| A | 1.188 kg | |
| B | 2.376 kg | |
| C | 0.4752 kg | |
| D | 0.9504 kg | |
| Not Answered | ||
| 37 | Why is a single-phase induction motor not self-starting? |
| A | Its rotor has no winding. |
| B | It operates only on DC supply. |
| C | The magnetic field produced is pulsating, not rotating. |
| D | It has a high starting current. |
| 38 | A half-wave rectifier circuit has a peak input voltage of 20 V. Assuming an ideal diode (no voltage drop), what is the approximate average DC output voltage? | |
| A | 19.3 V | |
| B | 6.37 V | |
| C | 12.7 V | |
| D | 20 V | |
| Not Answered | ||
| 39 | Which of the following correctly describes a feature of the 8085 microprocessor? |
| A | It has six 8-bit general-purpose registers that can be paired as BC, DE, and HL for 16-bit operations |
| B | The program counter (PC) is an 8-bit register that holds the address of the current instruction |
| C | The data bus is a 16-bit bidirectional bus that transfers data between the microprocessor and memory |
| D | The address bus is an 8-bit unidirectional bus used for specifying memory locations |
| 40 | An Op-Amp is configured as a non-inverting amplifier with an input resistor (Rin) of 1k and a feedback resistor (Rf) of 3k. If the input voltage (Vin) is 1V, what is the output voltage (Vout)? | |
| A | 3 V | |
| B | 10 V | |
| C | -4 V | |
| D | 4 V | |
| Not Answered | ||
| 41 | Photoresist materials used in PCB fabrication are sensitive to: |
| A | Infrared radiation |
| B | Ultraviolet light |
| C | Moisture |
| D | Temperature |
| 42 | The coercivity of a magnetic material indicates: |
| A | Energy stored in the material |
| B | Maximum permeability |
| C | The ability to withstand demagnetizing field |
| D | Magnetic susceptibility |
| 43 | Which of the following renewable energy source typically uses large rotating blades to generate electricity? |
| A | Photovoltaic cells |
| B | Fuel cells |
| C | Geothermal heat pumps |
| D | Wind turbines |
| 44 | The Tan Delta Test (Dissipation Factor Test) on a transformer's insulation provides an indication of: |
| A | The insulation quality of transformers and other electrical equipment. |
| B | The transformer's short-circuit impedance. |
| C | The turns ratio accuracy. |
| D | The transformer's efficiency. |
| 45 | Over-fluxing protection is essential for power transformers to prevent damage from excessive: |
| A | Reactive power |
| B | Current |
| C | Temperature |
| D | Voltage-to-frequency ratio (V/f) |
| 46 | Lissajous patterns on an oscilloscope are primarily used for: |
| A | Determining the phase relationship and frequency ratio between two sinusoidal signals. |
| B | Displaying digital logic states. |
| C | Measuring DC voltage levels. |
| D | Calibrating the oscilloscope's vertical amplifier. |
| 47 | What is the primary function of a dielectric material in an electrical component? |
| A | They have very high electrical conductivity. |
| B | They are used to create permanent magnets. |
| C | They convert light energy into electrical energy. |
| D | They can store electrical energy when subjected to an electric field. |
| 48 | In a series RLC AC circuit, what condition defines resonance? |
| A | When the voltage across the inductor is zero |
| B | When the current in the circuit is zero |
| C | When the inductive reactance equals the capacitive reactance |
| D | When the total impedance is infinite |
| 49 | In the Root Locus technique, branches of the root locus start from the: |
| A | Zeros of the open-loop transfer function. |
| B | Poles of the open-loop transfer function. |
| C | Zeros of the closed-loop transfer function. |
| D | Origin of the s-plane. |
| 50 | An overhead line conductor has a span of 100 meters and a sag of 2 meters. What is the approximate tension in the conductor if the weight per unit length is 0.6 kg/m? (Use g=9.8m/s2) | |
| A | 1000 N | |
| B | 2940 N | |
| C | 3675 N | |
| D | 980 N | |
| Not Answered | ||
| 51 | In resistance heating, the heat generated per unit time is directly proportional to: |
| A | Current |
| B | The square of the applied voltage |
| C | The product of current squared and resistance (I2R) |
| D | Resistance |
| 52 | Two coils have self-inductances of 4 H and 5 H with a mutual inductance of 2 H.If the currents in the coils are i1 = 3 A and i2 = 2 A, what is the total energy stored in the system? | |
| A | 15 J | |
| B | 40 J | |
| C | 20 J | |
| D | 50 J | |
| Not Answered | ||
| 53 | A shunt field winding of a DC motor has an inductance of 2 H and carries a current of 1.5 A. What is the energy stored in the field winding? | |
| A | 1.50 J | |
| B | 2.25 J | |
| C | 5.00 J | |
| D | 3.00 J | |
| Not Answered | ||
| 54 | An electrical technician is installing a 5-meter long heating element made from a special alloy wire with a resistivity of 1.1 x 10-6 m. If the cross-sectional area of the wire is 2 mm2, what is the electrical resistance of the wire used in the heating system? | |
| A | 9.78 | |
| B | 2.75 | |
| C | 15.15 | |
| D | 25.7 | |
| Not Answered | ||
| 55 | An op-amp has an open-loop gain of 105 and a feedback factor of 0.01. What is the closed-loop gain? |
| A | 99.9 |
| B | 10 |
| C | 1000 |
| D | 100,000 |
| 56 | What is the main purpose of a fuse in an electrical wiring system? |
| A | To convert AC to DC. |
| B | To measure current flow. |
| C | To step up voltage in a circuit. |
| D | To protect circuits from overcurrent by melting and breaking the circuit. |
| 57 | The excessive enrichment of nutrients in a water body, often due to agricultural runoff, leading to algal blooms and oxygen depletion, is known as: |
| A | Thermal inversion |
| B | Eutrophication |
| C | Sedimentation |
| D | Biomagnification |
| 58 | What component in a DC generator is responsible for converting the AC voltage generated in the armature into DC voltage at the terminals? |
| A | Field winding |
| B | Armature winding |
| C | Commutator |
| D | Brushes |
| 59 | An electric appliance connected to an AC supply consumes a true power of 120 W, while the apparent power drawn from the supply is 150 VA. What is the power factor of the circuit? |
| A | 0.7 |
| B | 0.6 |
| C | 0.8 |
| D | 0.9 |
| 60 | What does the "transient response" of a circuit refer to? |
| A | The initial response of the circuit to a sudden change. |
| B | The response of the circuit to varying frequencies. |
| C | The power dissipated by the circuit over time. |
| D | The long-term, stable behavior of the circuit. |
Section - II (Numerical, G.K & Reasoning)
| 61 | In a certain language, if "PEPPER" is represented as '@#@@#!' and "AIM" is represented as " &?* ", Then how is "PAIR" is represented in that code? |
| A | &#@? |
| B | *@!# |
| C | #@$! |
| D | @&?! |
| 62 | Complete the given series: A62, C64, E66, G68, _____ |
| A | I70 |
| B | K75 |
| C | J71 |
| D | L77 |
| 63 | Who was the first woman to receive a Nobel Prize, recognized for her work in radioactivity? |
| A | Rachel Carson |
| B | Jane Addams |
| C | Marie Curie |
| D | Virginia Woolf |
| 64 | Which battle marked the beginning of British colonial rule in India? |
| A | Battle of Plainar |
| B | Battle of Panipat |
| C | Battle of Plassey |
| D | Battle of Buxar |
| 65 | Which trade agreement was established to enhance trade between Canada, Mexico, and the United States? |
| A | BRICS |
| B | MERCOSUR |
| C | ASEAN |
| D | NAFTA |
| 66 | Ten years ago, the father's age was three times the age of his son. If the father's present age is 40 years, then what is the son's current age? |
| A | 10 years |
| B | 25 years |
| C | 15 years |
| D | 20 years |
| 67 | Arun walks 5 km to the East. Then he turns Left and walks 12 km. How far is he from the starting point? |
| A | 16 |
| B | 12 |
| C | 14 |
| D | 13 |
| 68 | The ratio of the lengths of A:B is 5:3 respectively. If A is 55 meters long, what is the length of B? |
| A | 30 meters |
| B | 40 meters |
| C | 23 meters |
| D | 33 meters |
| 69 | A shopkeeper bought a pen for Rs.50 and sold it for Rs.80. What was his earnings percentage? |
| A | 70% |
| B | 60% |
| C | 40% |
| D | 50% |
| 70 | Where is the headquarters of the "World Trade Organization (WTO)" located? |
| A | Geneva, Switzerland |
| B | Rome, Italy |
| C | Vienna, Austria |
| D | Brussels, Belgium |
| 71 | If the sum of the three consecutive numbers is 60, then what is the product of these numbers? |
| A | 7590 |
| B | 7234 |
| C | 7980 |
| D | 7346 |
| 72 | Arrange the following words as per their order in an English dictionary and choose the one word that comes first: Ship, Shine, Sheep, Shore. |
| A | Ship |
| B | Shine |
| C | Shore |
| D | Sheep |
| 73 | Study the following arrangement and answer the question: G H 7 U 7 3 F 7 L S 7 G 7 3 M 8 L 2 How many times the number 7 is repeated in an above arrangement? |
| A | 10 |
| B | 6 |
| C | 5 |
| D | 8 |
| 74 | In a class, if Alan ranked 15th from the top and 40th from the bottom, then how many students are there in the class? |
| A | 54 |
| B | 89 |
| C | 96 |
| D | 66 |
| 75 | If the value of 2/3 of a number is 16, then what is value of 1/6 of the same number? |
| A | 4 |
| B | 16 |
| C | 8 |
| D | 6 |
| 76 | If a book is offered for Rs. 50 and sold for Rs. 40, then what is the loss percent? |
| A | 20% |
| B | 60% |
| C | 40% |
| D | 30% |
| 77 | A, B, C, D and E are sitting on a bench. A is to the immediate right of B, C is to the immediate left of D, D is not sitting with E who is sitting at the left end of the bench. C is sitting at the second position from the right end. A is sitting to the immediate left of C.Then in which position is D sitting? |
| A | On the right end of the bench |
| B | Immediate right of B |
| C | Immediate right of E |
| D | Between B and C |
| 78 | Find the simple interest, when principal amount is Rs. 5000, rate of interest is 5% per annum and the time is 5 years. |
| A | Rs.1250 |
| B | Rs.800 |
| C | Rs.100 |
| D | Rs.1000 |
| 79 | Which river is known as the longest river in the world? |
| A | Yangtze |
| B | Godavari |
| C | Amazon |
| D | Nile |
| 80 | Which Indian city is known as the financial capital of India, hosting major banks and financial institutions? |
| A | Mumbai |
| B | New Delhi |
| C | Bengaluru |
| D | Chennai |
Section - III (English Language)
| 81 | Fill in the blank with correct article. Do you know _______ lyrics of this song? |
| A | a |
| B | an |
| C | the |
| D | No Article Required |
| 82 | Choose the option that will make the sentence grammatically correct and meaningfully complete. They had been in the house for a month when dark stains started ______ on the wall. |
| A | appear |
| B | appears |
| C | appeared |
| D | appearing |
| 83 | Choose the option that will make the sentence grammatically correct and meaningfully complete. He had just __________ his final solo album. |
| A | completes |
| B | completing |
| C | completed |
| D | complete |
| 84 | Complete the sentence using the correct preposition. I will be going out __________ the next two hours. |
| A | at |
| B | of |
| C | on |
| D | for |
| 85 | Choose the correct part of speech for the underlined word in the sentence given below. The daughter cooked a delicious three-course meal. |
| A | Adverb |
| B | Adjective |
| C | Noun |
| D | Verb |
| 86 | Choose the most appropriate preposition for the blank space. Sneha is studying _________ the University. |
| A | to |
| B | at |
| C | off |
| D | from |
| 87 | Select the option which best expresses the sentence in Indirect speech. "Do you work from home?" he asked. |
| A | He informed me if I worked from home. |
| B | He said me if I worked from home. |
| C | He told me if I worked from home |
| D | He asked me if I worked from home. |
| 88 | Identify the sentence in past continuous tense. |
| A | I worked on my thesis last night. |
| B | I work on my thesis every day. |
| C | I am working on my thesis right now. |
| D | I was working on my thesis last night. |
| 89 | Choose the option which when inserted in the blank, best fits the meaning of the sentence as a whole. Deenika ___________ for that Company X since last year. |
| A | has been working |
| B | work |
| C | will work |
| D | are working |
| 90 | Which option correctly uses the past perfect tense? |
| A | I am finishing my cooking of dinner at 6 PM. |
| B | I had cooked the dinner by 6 PM. |
| C | I finish my cooking dinner at 6 PM. |
| D | I am cooking my dinner at 6 PM. |
| 91 | Convert the following sentence to Active Voice. The movie Baahubali was directed by Rajamouli. |
| A | Rajamouli had been directed the movie Baahubali. |
| B | Rajamouli had directed the Baahubali movie. |
| C | Rajamouli directed the movie Baahubali. |
| D | The movie Baahubali the direction of Rajamouli. |
| 92 | Select the word that best completes the sentence. My computer is essential for my business. _____, my phone is critical for building relationship. |
| A | Unlike |
| B | Similarly |
| C | After |
| D | During |
| 93 | Choose the correct part of speech for the underlined word in the given sentence. I went to spain last summer. |
| A | Adjective |
| B | Adverb |
| C | Pronoun |
| D | Noun |
| 94 | Choose the correct part of speech for the underlined word in the sentence. The cheerful student lightened the room. |
| A | Adjective |
| B | Verb |
| C | Adverb |
| D | Noun |
| 95 | Select the option which best expresses the sentence in direct speech. He said that he goes to temple every day. |
| A | He was asking, "I went to temple every day." |
| B | He was telling, "I went to temple all day." |
| C | He said, "I go to temple every day." |
| D | He was informing, "I went to temple every day." |
| 96 | Convert the following sentence to Passive Voice. Krishna likes adventurous trips. |
| A | Adventurous trips were liked by the Krishna. |
| B | Adventurous trips are liked by Krishna. |
| C | Adventurous trips to be like by Krishna. |
| D | Adventurous trips so are liked by Krishna. |
| 97 | Select the word that best completes the sentence. After searching for three months, he ______ found his dream home. |
| A | finally |
| B | afterwards |
| C | specially |
| D | and |
| 98 | Identify the Verb in the sentence. Lalith forgot to buy the ice cream now. |
| A | Ice cream |
| B | Lalith |
| C | Now |
| D | Buy |
| 99 | Identify the "Addition Connectors" from the options given. |
| A | Moreover |
| B | Finally |
| C | Nevertheless |
| D | In the case of |
| 200 | Fill in the blank with correct option. The wedding hall is ______ the temple. |
| A | fell |
| B | of |
| C | near |
| D | away |
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