Q1:- in which of the following Transformers is the secondary winding always kept closed
1. Current transformer
2. Potential transformer
3. Power Transformers
4. Distribution transformer
Q3:- which of the following instruments has the highest torque/ weight ratio among the given instrument
1. Attraction type MI instrument
2. Repulsion type MI instrument
3. Permanent magnet moving coil instrument
4. Electrodynamometer instrument
ANSWER:-3
ANSWER:-3
1. Current transformer
2. Potential transformer
3. Power Transformers
4. Distribution transformer
ANSWER:-1
Q2:- two holes are drilled in the disc on a diameter of energy metre to
1. Increase ventilation
2. Reduce the weight of disc
3. Eliminate creeping on no load
4.Increase deflecting torque
ANSWER:-3
Q3:- which of the following instruments has the highest torque/ weight ratio among the given instrument
1. Attraction type MI instrument
2. Repulsion type MI instrument
3. Permanent magnet moving coil instrument
4. Electrodynamometer instrument
ANSWER:-3
Q4:- if current through the operating coil of moving iron instrument is doubled the operating force becomes
1. One and a half Times
2. 2times
3. 3 times
4. 4 times
1. One and a half Times
2. 2times
3. 3 times
4. 4 times
ANSWER:-4
Q5:- in moving iron instruments the iron moves in a direction to cause
1. Coil inductance to be constant
2. Mutual inductance to be minimum
3. Minimum reluctance path
4. Decrease in the flux passing through it
1. Coil inductance to be constant
2. Mutual inductance to be minimum
3. Minimum reluctance path
4. Decrease in the flux passing through it
ANSWER:-3
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