Lucknow Metro Questins

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Q1:- O.C. test is performed on the transformer to determine 

1. core loss and non- load primary current 
2. total loss in the transformer
3. efficiency of the transformer
4. copper loss in the winding 

ANSWER:- 1

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Q2:- The direction of force on a current carrying conductor placed in a magnetic field can be found by using 

1. fleming's right hand rule 
2. cork screw rule 
3. fleming's left hand rule 
4. right hand thumb rule

ANSWER:-3

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Q3:- In extra high voltage line which of the following circuit breaker are most suitable 

1. air circuit breakers 
2. vaccum circuit breakers 
3. oil circuit breakers 
4. SF6 breakers 

ANSWER:-4

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Q4:- Resistance welding can not be used for 

1. dielectrics
2. non ferrous materials 
3. any metal 
4. ferrous materials 

ANSWER:-1

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Q5:- Transformer is static device which transfer

1. frequency from primary to secndary 
2. current from primary to secondary
3. voltage from primary to secondary 
4. power from pRimary to secodary

ANSWER:-4

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