1. Alternator generates
a) dc
b) ac
c) both ac and dc
d) pulsating dc
ans. b
2. Alternator works on the principle of
a) mutual induction
b) Faraday's laws of electro-magnetic induction
c) self induction
d) self and mutual induction
ans. b
3. The rotor of the alternator requires
a) dc
b) ac
c) pulsating dc
d) none of these
ans. d
4. In large size alternators, flux is kept
a) stationary
b) rotating
c) either a or b is correct
d) none of these
ans. b
5. The rotor of an alternator has
a) 4 slip rings
b) 3 slip rings
c) 2 slip rings
d) no slip rings
ans. c
6. The generator which gives dc supply to the rotor is called
a) converter
b) exciter
c) inverter
d) rectifier
ans. b
7. The different types of rotor of an alternator are
a) salient pole type
b) cylindrical pole type
c) both a and b
d) none of these
ans. c
8. Salient pole type rotors are generally used with prime movers of
a) high speed
b) low speed
c) medium speed
d) low and high speed
ans. b
9. Cylindrical pole type rotors are generally used with prime movers of
a) high speed
b) low speed
c) medium speed
d) low and high speed
ans. a
10. The frequency of emf generated depends upon
a) speed of the alternator
b) number of poles of the alternator
c) type of alternator
d) both a and b are correct
ans. d
a) dc
b) ac
c) both ac and dc
d) pulsating dc
ans. b
2. Alternator works on the principle of
a) mutual induction
b) Faraday's laws of electro-magnetic induction
c) self induction
d) self and mutual induction
ans. b
3. The rotor of the alternator requires
a) dc
b) ac
c) pulsating dc
d) none of these
ans. d
4. In large size alternators, flux is kept
a) stationary
b) rotating
c) either a or b is correct
d) none of these
ans. b
5. The rotor of an alternator has
a) 4 slip rings
b) 3 slip rings
c) 2 slip rings
d) no slip rings
ans. c
6. The generator which gives dc supply to the rotor is called
a) converter
b) exciter
c) inverter
d) rectifier
ans. b
7. The different types of rotor of an alternator are
a) salient pole type
b) cylindrical pole type
c) both a and b
d) none of these
ans. c
8. Salient pole type rotors are generally used with prime movers of
a) high speed
b) low speed
c) medium speed
d) low and high speed
ans. b
9. Cylindrical pole type rotors are generally used with prime movers of
a) high speed
b) low speed
c) medium speed
d) low and high speed
ans. a
10. The frequency of emf generated depends upon
a) speed of the alternator
b) number of poles of the alternator
c) type of alternator
d) both a and b are correct
ans. d
