1. Which type of wire joint is commonly used to connect two wires of the same diameter in a straight line? A. Tee Joint B. Western Union Joint C. Straight Joint D. Britannia Joint Ans:- B 2. The outer layers of a PNP transistor are made of which type of semiconductor material? A. N-type semiconductor sandwiched between P-type material B. P-type material only C. N-type material only D. N-type and P-type material only Ans:- B 3. Which of the following will increase the induced EMF in an alternator? A. Reduce the magnetic flux density in the rotor B. Reduce the air gap between the stator and rotor C. Increase the reluctance of the magnetic path D. Use fractional pitch winding in the stator Ans:- B 4. What does a red safety sign typically indicate in an electrical environment? A. Warning B. Danger C. Notice D. Caution Ans:- B 5. Which factor should be considered first when selecting a site for installing an earth electrode to achieve low earth resistance? A. Soil resistivity at the locati...

ONE LINER ELECTRICAL QUESTION ANS ANSWER   1. A T-T connection has higher ratio of utilization than a V-V connection only when ? ans- non identical transformer are used . 2. For 3 to 3 phase converson , which polyphase connection would you select ? ans- Delta / Inter connected star . 3. Five limb core construction of a transformer has advantage  over three limb core construction that ? ans- magnetic reluctance of the three phase can be balance . 4. Transformer winding are tapped in the middle  because ? ans- It eliminates axial force on the winding. 5. For large power transformer , it is preferred to use ? ans- Tank with separated cooler. 6. In a transformer with close magnetic cooling between primary and secondary winding ? ans- Regulation will be good . 7. For getting minimum weight of a transformer the weight of iron should be ? ans- Equal to the weight of copper. 8. A constant current transformer should not have ? ans- high value of resistance. 9. scott connection ...

 1. In a Power Plant a reserve generating capacity which is in operation but not in service, is known as: A) Hot reserve   B) Cold reserve C) Spinning reserve   D) Firm power Ans:- A 2. Which Lightening stroke is most dangerous: A) Direct stroke on tower top B)Direct stroke on ground wire C)Direct stroke on line conductor D)Indirect stroke on conductor Ans:- C 3. Transmission efficiency increases as: A)Voltage and Power factor both increase B)Voltage and Power factor both decrease C)Voltage increase but power factor decrease D)Voltage decrease but power factor increase Ans:- A 4.When Alternating Current passes through a conductor: A) It remains uniformly distributed throughout the section of conductor B) Portion of conductor near the surface carries more current as compared to the core C) Portion of conductor near the surface carries less current as compared to the core D)Entire current passes through the core of the conductor Ans:- B 5. The effective resistanc...

 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 B) Mercury vapour lamp C) Sodium vapour lamp D) Fluorescent 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 mot...