Measurements and Instrumentation - Part 1 Online Exam Quiz

Measurements and Instrumentation - Part 1 GK Quiz. Question and Answers related to Measurements and Instrumentation - Part 1. MCQ (Multiple Choice Questions with answers about Measurements and Instrumentation - Part 1

To increase Q factor of a coil, the wire should be

Options

A : long

B : thin

C : thick

D : long and thin

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An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is

Options

A : 2%

B : 2.5%

C : 4%

D : 5%

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The coil of a moving iron instrument has a resistance of 500 ? and an inductance of 1 H. It reads 250 V when a 250 V dc is applied. If series resistance is 2000 ?, its reading when fed by 250 V, 50 Hz ac will be

Options

A : 260 V

B : 252 V

C : 250 V

D : 248 V

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In 3 phase power measurement by two wattmeter method, the reading of one wattmeter is zero. The power factor of load is

Options

A : 1

B : 0.5

C : 0

D : 0.8

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In a CRO which of the following is not a part of electron gun

Options

A : cathode

B : grid

C : accelerating anode

D : X - Y plates

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If reference sound pressure P 0 is 2 x 10 -5 N/m 2 , a sound pressure of 90 dB is equal to

Options

A : 0.632 N/m 2

B : 0.707 N/m 2

C : 0.835 N/m 2

D : 0.925 N/m 2

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Which of the following voltmeters would you use for measuring voltage across 20 k? resistance?

Options

A : Voltmeter having a resistance of 5 k?

B : Voltmeter having a sensitivity of 1 kW/V

C : Voltmeter having sensitivity of 10 kW/V

D : None of the above

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A single phase energy meter has the rating 1200 resolutions/ kWh. If a 500 W electric gadget is used for 4 hours, the energy meter will make

Options

A : 1200 revolutions

B : 1800 revolutions

C : 2100 revolutions

D : 2400 revolutions

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In which of the transformer is the secondary nearly short circuited under normal operating conditions?

Options

A : CT

B : PT

C : Distribution transformer

D : Power transformer

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A moving coil instrument has a resistance of 0.6 ? and full scale deflection at 0.1 A. To convert it into an ammeter of 0-15 A range, the resistance of shunt should be

Options

A : 0.6 ?

B : 0.06 ?

C : 0.1 ?

D : 0.004 ?

View Answer

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