1) If one line conductor of a 3-phase line is cut, the load is then supplied by:
A) Single phase
B) Two phase
C) Three phase
D) Five phase
Ans:- A
2) In order to measure power in a 3-phase, 4-wire unbalance load, the minimum number of wattmeters required would be:
A) 1
B) 2
C) 3
D) 4
Ans:- C
3) In a star connected system, the relation between the line voltage VL and Phase voltage Vph is:
A) VL = Vph
B) VL = Square root of 3*Vph
C) VL = Vph/Square root of 3
D) Zero
Ans:-B
4) Three 50-ohm resistors are connected in star across 400 V, 3-Phase supply. If one of the resistors is disconnected, then line current will be:
A) 4 A
B) 8*Square root of (3) A
C) 8 A
D) 8/Square root of (13) A
Ans:- A
5) DC supply is essential for the operation of :
A) Arc lamp
Ans:- A
6) The motor generator set can be used for conversions of electrical power in various forms. Which of the following given below is applicable to a motor generator set?
(i) AC to DC
(ii) DC to AC
(iii) DC at some voltage level to DC at another voltage level
(iv) Alternating power at one frequency to Alternating power at another frequency
(v) Fixed AC voltage to variable or regulated AC voltage
(vi) Single phase AC voltage to 3 phase AC voltage
A) (ii), (iii), (iv), (v) and (vi) only
B) (ii), (iii), (iv) and (vi) only
C) (i), (ii), (iii), (iv), (v) and (vi) only
D) (i), (ii), (iii), (iv) and (v) only
Ans:- C
7) Match the List-1(Converter circuit ) with List-2 (Output power Supply), Select the correct code given below.
A) A(4) B(2) C(3) D(1)
B) A(1) B(3) C(2) D(4)
C) A(4) B(3) C(2) D(1)
D) A(1) B(2) C(3) D(4)
Ans:- B
8) A DC circuits usually having which load is present in
A) Resistive-(R )
B) Inductive-(L)
C) Capacitive-(C )
D) Both Inductive and capacitive-(L&C)
Ans:- A
9) The current that always flows in one direction which represents:
A) Alternating current
B) Diminishing current
C) Zero current
D) Direct current
Ans:- D
10) The average value of 4 A direct current in the case of full-wave rectifier is :
A) 1 A
B) 3 A
C) 4 A
D) 2 A
Ans:- D
11) The frequency of DC in India is:
A) 600 Hz
B) 60 Hz
C) Zero Hz
D) 30 Hz
Ans:- C
12) The curve representing the Ohm's law is:
A) A parabola
B) Sine function
C) Linear
D) A Hyperbola
Ans:- C
13) What is the purpose of load in electric circuit?
A) Decrease the circuit current
B) Increase the circuit current
C) Both increase and decrease the current
D) Utilise the electrical energy
Ans:-D
14) Kirchhoff's voltage law deals with :
A) conservation of charge
B) conservation of momentum
C) conservation of energy
D) conservation of angular momentum
Ans:- C
15) Mesh and Nodal analysis is based on :
A) Kirchhoff's current law
B) Kirchhoff's voltage law
C) Maxwell's law
D) Kirchhoff's voltage law and Kirchhoff's current law
Ans:- D
16) If the number of valence electrons of an atom is less than 4, the substance is called as
A) A thermistor
B) A conductor
C) An insulator
D) A semiconductor
Ans:-B
17) A wire gauge is used to measure:
A) Length of the wire
B) Thickness of insulation layer of a wire
C) Area of a wire
D) Diameter of a wire
Ans:- D
18) The bit of a soldering iron is made of:
A) Brass
B) Copper
C) Carbon
D) Stainless steel
Ans:-B
19) Chiesels are made of:
A) High speed steel
B) High carbon steel
C) Cast steel
D) Tungsten steel
Ans:- B
20) Match the List-1(Name of Tool) with List-2 (General size), Select the correct code given below.
A) A(4) B(2) C(3) D(1)
B) A(1) B(3) C(2) D(4)
C) A(4) B(3) C(2) D(1)
D) A(1) B(2) C(3) D(4)
Ans:- B
21) In inverter datasheet mentioned, MPPT means:
A) Maximum Power Point Tracking
B) Maximum Power Point Traction
C) Maximum Power Point Tripper
D) Maximum Power Junction Point Traction
Ans:- A
22) The main function of inverter in solar power plant is:
A) It converts DC power to AC power
B) It converts DC power to DC power
C) It converts AC power to DC power
D) It converts AC power to AC power
Ans:- A
23) In small size (KW Scale) solar power plant, which type of inverter is preferably used?
A) Central type
B) String type
C) Hybrid type
D) Controller type
Ans:- B
24) In solar panel datasheet, fill factor is given by the relation as
A) Fill factor = Vmp/Voc
B) Fill factor = Imp/Isc
C) Fill factor = (Vmp*Imp)/(Voc*Isc)
D) Fill factor = (Voc*Isc)/(Vmp*Imp)
Ans:- C
25) The pointer of an indicating instrument is generally made up of:
A) Aluminium
B) Silver
C) Copper
D) Soft steel
Ans:- A
UPPCL PREVIOUS YEAR QUESTION PAPER
26) Moving coil (M.C ) Type instruments are used on:
A) AC
B) DC
C) AC & DC
D) Both AC and DC
Ans:- B
27) The meter constant of energy meter is 1500 rev/KWh, the disc makes 3000 revolutions in a given time. The energy
consumed is :
A) 1 KWh
B) 2 KWh
C) 3 KWh
D) 4 KWh
Ans:- B
28) Match the List-1 (Instruments) with List-2 (Work Principle). Select the correct code given below.
A) A(4) B(2) C(3) D(5)
B) A(1) B(3) C(2) D(4)
C) A(4) B(3) C(2) D(5)
D) A(1) B(2) C(2) D(6)
Ans:- D
29) Tumbler switch is made up of:
A) Plastic
B) Bakelite
C) Iron
D) Rubber
Ans:- B
30) A circuit breaker is a:
A) Voltage controlled device
B) Current controlled device
C) Circuit interrupting device
D) Current limiting device
Ans:- C
31) A transformer is an efficient device because it:
A) Uses inductive coupling
B) Uses magnetic coupling & is a static device
C) Uses capacitive coupling
D) Uses electric coupling & is a dynamic device
Ans:- B
32) The current rating of fuse is 5 A. The fusing current will be:
A) 5 A
B) 2.5 A
C) More than 5 A
D) 1 A
Ans:- C
33) A fuse should be connected in:
A) Series of live conductor
B) Parallel of neutral conductor
C) Parallel of live conductor
D) Series of neutral conductor
Ans:- A
34) A thermal over load relay is provided in a starter to protect the motor against:
A) Open circuit
B) Excess current
C) Low voltage
D) Short circuit
Ans:-B
35) Which type of switch is used in stair case wiring?
A) One way SP switch
B) Two two way SP switches
C) Two one way SP switches
D) Two intermediate SP switches
Ans:- B
36) Match the List-1(Type of wiring) with List-2(Applications), Select the correct code given below.
A) A(1) B(2) C(4) D(3)
B) A(2) B(3) C(1) D(4)
C) A(2) B(1) C(3) D(4)
D) A(1) B(4) C(2) D(3)
Ans:- B
37) The primary distribution of electric power is done by:
A) 0-Phase system
B) 3-Phase, 4-wire system
C) 3-Phase, 3-wires system
D) 1-Phase system
Ans:- C
38) The feeder is designed mainly based on:
A) Operating frequency
B) Operating voltage
C) its current carrying capacity
D) voltage drop in it
Ans:- C
39) The term service mains refers to :
A) Primary transmission
B) Secondary distribution
C) Primary distribution
D) Secondary transmission
Ans:- B
40) In India, secondary distribution is carried out at which voltage level?
A) 600/300V
B) 700/350V
C) 400/230V
D) 800/200V
Ans:- C
41) Electrical appliances are connected in parallel because it:
A) Draws less current
B) Is a simple circuit
C) Makes the operation of appliances independent of each other
D) Results in reduced power loss
Ans:- C
42) In a series circuit, the current is:
A) Proportional to the resistance
B) Zero
C) Different in different resistor
D) Constant
Ans:- D
43) Match the List-1(Multiple/submultiple) with List-2 (Value), Select the correct code given below.
A) A(4) B(2) C(3) D(1)
B) A(1) B(3) C(2) D(4)
C) A(4) B(3) C(2) D(1)
D) A(1) B(2) C(3) D(4)
Ans:- B
44) If an electric kettle draws 4 amperes of current at 240 Volts supply then, What will be the power consumed by the kettle?
A) 60 Watts
B) 500 Watts
C) 960 Watts
D) 1000 Watts
Ans:- C
45) The process of electrolysis requires
A) AC supply only
B) DC supply only
C) Both AC and DC supply
D) Varying voltage
Ans:- B
46) The function of dry cell is to convert:
A) Chemical energy to mechanical energy
B) Electrical energy into magnetic energy
C) Chemical energy to electrical energy
D) Electrical energy into mechanical energy
Ans:- C
47) Distilled water is used in electrolyte because it:
A) Prevent polarization
B) Speeds up electrochemical action
C) Prevents or slows down local action
D) Improves specific gravity
Ans:- C
48) Match the List-1(Condition of battery ) with List-2 (Specific gravity/Hydrometer reading), Select the correct code given below.
A) A(4) B(2) C(3) D(1)
B) A(1) B(3) C(2) D(4)
C) A(4) B(3) C(2) D(1)
D) A(1) B(2) C(3) D(4)
Ans:- B
49) The solar PV panels power rating is:
A) Ampere-peak-(Ip)
B) Kilowatts-(kW)
C) Watt-peak-(Wp)
D) Volt-peak-(Vp)
Ans:- C
50) Which is costlier when polycrystalline solar panels is compared with mono crystalline?
A) Mono crystalline solar pv panels
B) Poly crystalline solar pv panels
C) Both are available in limited quantity and cannot be compared
D) Both are same
Ans:- A
51) The unit of solar insolation is :
A) KWh
B) KWh/m^2/day
C) KW/m^3
D) KW
Ans:- B
52) The modules or panels are connected in series and strings are connected in parallel is called as:
A) Array
B) String
C) String & Array
D) Array & String
Ans:- C
53) The electric current in a liquid is due to flow of
A) Electrons only
B) Electrons and Positive ions both
C) Positive ions only
D) Negative and Positive ions both
Ans:- D
54) Electric Current is a
A) Vector quantity
B) Scalar quantity
C) Numbers only
D) Sometimes scalar and sometimes vector
Ans:- B
55) The force that causes the electrons to move directionally (current) in an electrical circuit is called
A) An magnetic force
B) An electron repulsion force
C) An attraction force
D) An electromotive force
Ans:- D
56) If a 400 Watt lamp is connected across a 250 V source then what will be the circuit current?
A) 4 A
B) 0.8 A
C) 1.6 A
D) 2 A
Ans:- C
57) A 4-pole, 250 W, 115 V, 60 Hz capacitor-start induction motor takes a full-load line current of 5.3 A while running at 1760 r.p.m. The full-load efficiency of the motor is 64%. The slip is
A) 2-pole
B) 4-pole
C) 6-pole
D) 8-pole
Ans:- B
58) A capacitor-start, capacitor-run motor is having
A) Zero starting torque
B) Low power factor
C) High power factor
D) Low efficiency
Ans:- C
59) The frequency of the rotor current(fr) in an induction motor is given by the expression:(S = Slip and F = Supply
frequency)
A) Fr = SxF
B) F = SxFr
C) Fr = S/F
D) S = FxFr
Ans:-A
60) A 50 Hz, 4-pole single phase induction motor, will have synchronous speed of :
A) 1200 rpm
B) 750 rpm
C) 1500 rpm
D) 3000 rpm
Ans:- C
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