Measuring Systems And Instrumentation

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Q1:-In a moving coil instrument the deflecting torque is proportional to 

1. current 
2. square of the current 
3. square root of the current 
4. sine of the measurand

 ANSWER:-1

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Q2:-Electrostatic instruments are normally used for 

1. low current measurements
2. high current measurements
3. low voltage measurements
4. high voltage measurements

ANSWER:-4

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Q3:-No eddy current and hysteresis losses occur in 

1. Electro static instruments
2. PMMC type instruments
3. moving iron instruments
4. none of these

ANSWER:-1

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Q4:-Creeping is observed in

1. watt hour meter
2. power factor meters
3. wattmeter
4. ammeter

ANSWER:-1

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Q5:-A C.T. is overload when 

1. the load connected to it is less than its burden
2. its terminals are short circuited
3. when its terminals are open circuited 
4. when the primary current is 110 % of its rated value

ANSWER:-3

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