MEASUREMENT AND INSTRUMENTATION QUIZ

Which of following voltmeters would you use for measuring voltage across 20KΩ resistance

Voltmeter having a resistance of 5 ΩK.

Voltmeter having sensitivity of 10 KW/V.

Voltmeter having sensitivity of 1 KW/V.

None of above.

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A Lissajous pattern on an oscilloscope has 5 horinzontal tangencies and 2 vertical tangencies. The frequency of horizontal input is 100 Hz. The frequency of the vertical will be

400 Hz.

250 Hz.

625 Hz.

500 Hz.

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Electrostatic instruments are normally used for

High voltage measurements

High current measurements

Low voltage measurements

Low current measurements

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Which of following is a vector quantity?

Magnetic potential.

Magnetic field intensity.

Relative permeability.

Flux density.

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Induction wattmeter can measure

Ac power only

Dc power only

Both AC and DC

None of the listed here

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Resolution of an instrument is

the maximum quantity it can measure.

ability to distinguish polarity.

the maximum non linearity.

the minimum quantity it can measure.

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Dynamic errors are caused by

instrument not responding fast

environmental error

observational error

human error

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The core flux in the CT of above question no.6, under the given operating conditions is

1000 mWb.

225 mWb.

0.

450 mWb.

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Which of the following are integrating instruments?

Voltmeters

Ammeters

Ampere hour and watt hour meters

Wattmeters

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The chemical effect of current is used in

C. ammeter hour meter

None of these

C. ammeter

C. energy meter

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