a) 6 A
b) 6.15 A
c) 8.7 A
d) 5 A

Ans: (b)

a) Induction motor
b) Synchronous motor
c) D.c. series motor
d) D.c. compound motor

Ans: (a)

a) Amplifier
b) Rectifier
c) Transformer
d) Diode

Ans: (a)

a) A rotary convertor can be called a Synchronous invertor.
b) A rotary convertor can be called a Synchronous convertor.
c) A rotary convertor can be called a Synchronous divertor.
d) A rotary convertor can be called a Synchronous capacitor.

Ans: (b)

a) Single phase rotary convertor.
b) Three phase rotary convertor.
c) Six phase rotary convertor.
d) Twelve phase rotary convertor.

Ans: (c)

a) True
b) False

Ans: (a)

a) By using tap changing transformer.
b) Series reactance control method.
c) Induction regular.
d) Synchronous booster control method.

Ans: ()

a) Convertor only
b) Inventor only
c) (a) and (b) both
d) Transducer

Ans: (c)

a) When anode is as positive potential with respect to cathode
b) When anode is at negative potential with respect to cathode
c) When anode will repel the electrons
d) When anode is at very low temperature

Ans: (a)

a) To limit the rate of change of flux in the circuit
b) To limit the voltage of the circuit
c) To limit the rate of change of the current in the circuit
d) To limit the current in the circuit

Ans: (d)

a) They are easily available
b) They work noiselessly
c) They are very cheap
d) Their output is much smoother

Ans: (d)

a) (actual power)/(full load rating)
b) (wattless power component)/(full load rating)
c) (actual power)/(half load rating)
d) (total a.c. input)/(total d.c. output)
e) (total d.c output)/(total d.c. input)

Ans: (a)

a) Diode rectifier
b) Silicon controlled rectifier
c) Mercury-arc rectifier
d) Metal rectifier

Ans: (c)

a) Reactance drop
b) Mean resistance drop
c) Arc voltage drop

Ans: ()

a) True
b) False

Ans: (b)

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