Lucknow Metro Questions

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Q1:-In case of separately excited dc generator with constant speed when speed when field current  is increased 

1. the generated emf increased directly 
2. frequency of the generated emf reduces 
3. the generated emf reduces inversely 
4. frequency of the generated emf increases

ANSWER:-1

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Q2:- Iron losses in DC m/c take place in 

1. yoke only 
2. yoke and armature only 
3. armature winding only
4. armature core only

ANSWER:-4

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Q3:- The probability of occurrence is highest for 

1. line to ground fault 
2. three phase short circuit fault 
3. line to line fault 
4. double line to ground fault 

ANSWER:-1

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Q4:- In any electric circuit the flow of electron constitutes 

1. an electric current 
2. magnetic charge 
3. an electromotive force
4. an electric charge

ANSWER:-1

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Q5:- For power factor improvement the amount of capacitance required for star connected capacitor bank is 

1. half of thew delta connected banks 
2. three times less than delta connected banks
3. three times more than delta connected banks 
4. equal to delta connected banks 

ANSWER:-3

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