Measuring Systems And Instrumentation

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Q1:-The VA rating of instrument transformers is normally near

1. 0.1 VA
2. 10 VA
3. 100 VA
4. none of these

ANSWER:-2

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Q2:-The main error in a dynamometer type watt meter is due to 

1. pressure coil inductances
2. pressure coil capacitances
3. mutual inductionces
4. none of these

ANSWER:-1

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Q3:-Induction type watt meter operation is based on 

1. electro static forces
2. thermo electric effect
3. hall effect
4. eddy current effect

ANSWER:-1

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Q4:-The error in C.T. are mainly due to 

1. leakage flux
2. excitation emf required
3. core losses
4. copper losses

ANSWER:-3

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Q5:-Schering bridge is used to measure

1. dielectric loss
2. the inductance
3. low resistance 
4. mutual inductance

ANSWER:-1

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