DC Machine

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Q1:-A dc generator can be termed as 

1. rotating amplifier 
2. promer mover
3. power pump
4. none of these 

ANSWER:- 1

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Q2:-which of the following dc motors is suitable for high starting toque

1. shunt motor
2. commutative compound motor
3. series motor
4. compound motor

ANSWER:-3

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Q3:-The function of compensating winding placed in slots in the pole shoes is 

1. to neutralise the armature reaction effect
2. to avoid unequal distribution of current at brushes
3. to avoid short circuit current
4. none of these

ANSWER:-2

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Q4:-The function of the compensating windings placed in slots in the pole shoes is

1. to neutralise cross magnetising effect
2. to netralise the demagnetiseing effect
3. to neutralise both the effects
4. to avoid flash over around the commutator

ANSWER:-4

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Q5:- For which of the following dc motors is the typical field of application mentioned ?

1. shunt motor : electric trains
2. series motor : machine tools 
3. series motor : belt drive 
4. compound motor : fly wheel drive 

ANSWER:-4

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