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BARC ECE 2019 : Measurement Nuclear Quiz 2

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Question 1

In a variable reluctance type transducer, the self-inductance of the coil is largest for which of the following values of the length of the air gap?

Question 2

A copper resistance thermometer has a resistance of 10 Ω at 30 °C. What is the maximum temperature that it can measure if the maximum resistance of the thermometer is 16 Ω? The resistance temperature coefficient of copper is 0.00393 Ω/Ω- °C.

Question 3

A translational potentiometer has the resistance wire wound around a card of length 20 mm. If the number of turns is 40 per mm, find the resolution of the potentiometer.

Question 4

A resistance wire strain gauge of soft iron has a resistance of 100 Ω. When it is subjected to a strain, the length of the wire changed from 45 cm to 47.4 cm. Neglecting the piezo-resistive effect, determine the resistance of the wire after being strained. Poisson’s ratio of soft iron is 1.6.

Question 5

A Maxwell’s capacitance bridge is used to measure an unknown inductance has following data –
R₁= 100 Ω, R₂ = 200 Ω, R₃= 400 Ω, R₄= 1000 Ω and C₄= 2 µF
Then calculate the value of Q factor of coil if frequency is 500 Hz.

Question 6

Which one of the following transducers requires power supply for its operation?

Question 7

To increase the range of a voltmeter

Question 8

Which among the following hydrostatic devices is based on Archimedes principle?
i. Displacers
ii. Bubblers
iii Differential Pressure Transmitters

Question 9

The concern with capacitance-voltage meters is related to:

Question 10

A moving coil instrument has a resistance of 10 Ω and gives a fulls-scale deflection when carrying a current of 50 mA. What external resistance should be connected so that the instrument can be used to measure current up to 50 A?

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ESE & GATE EC Electrical & Electronics Measurements

May 17ESE & GATE EC