Essentials Of Indicating Instrument - 1 - MCQs with answers

Essentials Of Indicating Instrument - 1 - MCQs with answers

Q1. The electromagnetic effect is generally utilized for

A. Ammeters
B. Voltmeters
C. Wattmeters and watt-hour meters
D. All of these

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Q2. The electrostatic effect is utilized for

A. Ammeters
B. Voltmeters
C. D.C. ampere-hour meters
D. Wattmeters

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Q3. Integrating instruments is the subdivision of the secondary instruments. The example for integrating instruments is

A. Ampere-hour meters
B. Watt-hour meters
C. Wattmeters
D. Ampere-hour and watt-hour meters

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Q4. The moving system in the indicating instruments is subjected to

A. Deflecting torque
B. Controlling torque
C. Damping torque
D. All the above

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Q5. If the deflection torques on moving system increases then the controlling torque

A. Increases
B. Decreases
C. Remains same
D. None of these

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Q6. In the absence of the restoring torque, the pointer

A. Will not deflect from its initial position

B. Will deflect but would not return to its zero position on removing current

C. Will deflect and return to its zero position on removing current

D. Will swing from minimum to maximum position

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Q7. In indicating instruments, the controlling and restoring torque can be obtained by using

A. Spring
B. Gravity
C. Either by spring or by gravity
D. Neither by spring nor by gravity

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Q8. The restoring torque in a spring controlled indicating instrument is

A. Directly proportional to the angle of deflection of moving system

B. Directly proportional to the sine of angle of deflection of moving system

C. Inversely proportional to the angle of deflection of moving system

D. Directly proportional to the square of the angle of deflection of moving system

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Q9. The deflecting torque in a permanent magnet moving coil type instrument is

A. Directly proportional to the angle of deflection of moving system
B. Directly proportional to the current flowing through it
C. Directly proportional to the current flowing through it
D. Inversely proportional to the current flowing through it

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Q10. The spring which is used for producing controlling torque in indicating instruments are made up of materials which is/are

A. Non-magnetic
B. Not subjected to much fatigue
C. Low specific resistance and low temperature resistance coefficient
D. All of these

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