Electrical Instruments and measurements

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Q1:- which of the following advantage the dynamometer wattmeter has

1. uniform scale
2. can work on ac and dc both
3. high accuracy
4. all of the above.

ANSWER:-4

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Q2:- The meter used for measuring electrical energy is called 

1. kWh meter
2. wattmeter
3. multimeter
4. ammeter

ANSWER:-1

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Q3:- At low power factor the dynamometer wattmetr will cause

1. no error
2. serious error
3. minute error
4. none of the above

ANSWER:-2

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Q4:- In dynamometer type of wattmeter, which of the coil is split up into two parts.

1. pressure coil 
2. current coil
3. pressure coil and current coil both
4. none of the above

ANSWER:-2

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Q5:- Which of the following type of damping is most commonly in the dynamometer type wattmeter

1. fluid friction 
2. eddy current
3. air friction
4. air and fluid friction both

ANSWER:-3

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