BSNL TTA Practice Questions

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Q1:- The cheapest motor in the fractional horse power motors is 

1. split phase motor
2. capacitor start motor
3. shaded pole motor
4. none of the above

ANSWER:- 3

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Q2:- The motor generally used in house hold food mixer is 

1. shaded pole motor
2. universal motor
3. capacitor start motor
4. none of the above

ANSWER:- 2

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Q3:- The direction of rotation of 1-phase capacitor motor (fan) can be reversed in interchanging connection of 

1. main winding and starting winding 
2. starting winding only 
3. main winding only 
4. any one of the starting or main winding 

ANSWER:- 4

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Q4:- The D.O.R. of shaded pole type motor can be reversed by 

1. interchanging the supply terminals 
2. interchanging the main winding terminals 
3. reversing the position of the rotor
4. none of the above

ANSWER:- 3

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Q5:- When a single phase motor picks up predetermined speed its starting winding is disconnected but still it continue to run on

1. compensating winding 
2. main winding 
3. starting winding 
4. rotor winding

ANSWER:- 2

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