Q.66 Two identical SCRs are connected back to back in series with a load. If each SCR is fired at 90 degree, a PMMC voltmeter across the load would read:Ans 1. 12. maximum voltage3. zero4.             √2 ...

Q.12 Which of the following is correct about an ideal transformer?Ans 1. Primary and secondary winding have some resistance.2. The core has low permeability.3. The core has high reluctance.4. Eddy current and hysteresis losses are zero.Correct Ans Provided: ...

Q.23 De-Sauty’s bridge is used to measure:Ans 1. capacitance2. frequency3. resistance4. inductanceCorrect Ans Provided: 1

Q.1 Consider the following statements about an indoor substation and select the most appropriate option. a. The construction of an indoor substation is complicated.b. These substations install beyond the 66 KV voltage level.c. Cannot easily expand the ...

Q.37 A bridge-type cycloconverter consists of:Ans 1. 6 thyristors2. 8 thyristors3. 4 thyristors4. 2 thyristorsCorrect Ans Provided: 2

Q.19 Select the correct match from the following options.Ans 1. Controlled rectifier – solar cell2. Cycloconverter – high power AC drive3. Inverter – ceiling fan drive4. Voltage controller – magnet power supplyCorrect Ans Provided: 2

Q.48 Which of the following is NOT an advantage of autotransformer?Ans 1. Less copper loss than the equivalent two winding transformer.2. The short circuit current is lesser than that for the two winding transformer.3. Provides better regulation.4. Less ...

Q.5 The node which has only incoming branch is called:Ans 1. chain node2. input node3. sink node4. source nodeCorrect Ans Provided: 3

Q.63 Which of the following is NOT true about IGBT?Ans 1. It is a voltage controlled device.2. It has positive temperature coefficient.3. It is a three-terminal power semiconductor device.4. It is a majority-carrier device.Correct Ans Provided: 4

Q.14 The PIV of each diode in a bridge circuit is ______ that of the equivalent centre tap circuit.Ans 1. thrice2. six times3. one-half4. five timesCorrect Ans Provided: 3