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MCQs 1: Induction wattmeters can be used with

Only AC supply Only DC supply Both AC and DC supply None of these
Answer Explanation

MCQs 2: The frequency and supply voltage of induction wattmeters are

Constant, constant Constant, variable Variable, constant Variable, variable
Answer Explanation

MCQs 3: In induction type wattmeter both current and pressure coils are required. For obtaining the required phase difference

Shaded pole principle is used Two separate ac magnets are used Only one ac magnets are used All of these
Answer Explanation

MCQs 4: The scale of induction wattmeter extends over

70 degree 120 degree 180 degree 300 degree
Answer Explanation

MCQs 5: In induction watt - hour meter, due to shunt magnet the torque is not zero power factor. It can be compensated by using

Shading ring Power factor compensator Drilling holes in the disc on a diameter Both (a) and (b)
Answer Explanation

MCQs 6: For friction compensation in an induction watt-hour meter is done by making

The ratio of the shunt magnet flux and series magnet flux large with the help of two shading bands The ratio of the series magnet flux and shunt magnet flux large with the help of two shading bands The ratio of the shunt magnet flux and series magnet flux large with the help of three shading bands The ratio of the series magnet flux and shunt magnet flux large with the help of three shading bands
Answer Explanation

MCQs 7: Function of transducer is to convert

Electrical signal into non electrical quantity Non electrical quantity into electrical signal Electrical signal into mechanical quantity All of these
Answer Explanation

MCQs 8: Potentiometric transducers are used for the measurement of

Pressure Displacement Humidity Both (a) and (b)
Answer Explanation

MCQs 9: The most common application of float system is

To monitor the fuel tank level in motor vehicle To monitor the flow of solid To monitor the flow of liquid All of these
Answer Explanation

MCQs 10: Capacitive devices are used for the level measurement of

Only liquid Solid in powdered form Both (a) and (b) None of these
Answer Explanation

MCQs 11: In ultrasonic level gauge, the ultrasonic source is placed at the

Bottom of the vessel containing the liquid Top of the vessel containing the liquid Middle of the vessel containing the liquid Far from the vessel containing the liquid
Answer Explanation

MCQs 12: In the beginning, all the outputs of the successive approximation type register is at

Logic zero Logic one Toggling None of these
Answer Explanation

MCQs 13: Q meter is used to measure the properties of

Inductive coils Non inductive coils Capacitive coils Both (a) and (c)
Answer Explanation

MCQs 14: Can an instrument suffer both zero drift and sensitivity drift at the same time?

Yes No It depends on the supply voltage None of these
Answer Explanation

MCQs 15: The non coincidence between loading and unloading curves is known as

Zero drift characteristics Sensitivity drift characteristics Hysteresis Zero drift plus sensitivity drift characteristics
Answer Explanation

MCQs 16: Hysteresis most commonly occurs in instruments that contains

Springs Electrical windings formed round on iron core Both (a) and (b) None of these
Answer Explanation

MCQs 17: In a measuring instrument, dead space is defined as the

Range of different input values over which there is no change in output values Range of different output values for the same input values Either (a) or (b) None of these
Answer Explanation

MCQs 18: If an instruments exhibits hysteresis then

It also displays dead space It will not display any dead space Either (a) or (b) None of these
Answer Explanation

MCQs 19: Backlash is commonly experienced in gear sets used to convert between translational and rotational motion. Backlash is a typical cause of

Hysteresis Dead space Zero drift Sensitivity drift
Answer Explanation

MCQs 20: A zero order system is the one in which output changes instantaneously as the input changes. The example of zero order system is

Potentiometer Liquid - in - glass thermometer Accelerometer Transducer
Answer Explanation

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