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Measurement and Instrumentation

Measurement and Instrumentation
Purely mechanical instrument cannot be used for dynamic measurements because they have

 high inertia.
 large time constant.
All of these
 higher response time.

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Measurement and Instrumentation
The range of a moving iron ac ammeter is extended by

Changing number of turns of operating coil
A shunt
None of the listed here
A multiplier

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Measurement and Instrumentation
A pressure measurement instrument is calibrated between 10 bar and 260 bar. The scale span of the instrument is

 270 bar.
 260 bar.
 10 bar.
  250 bar.

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Measurement and Instrumentation
In a moving coil instrument, the deflecting torque is proportional to

Square of the current
Squareroot of the current
Sine of the measurand
Current

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Measurement and Instrumentation
A moving coil ammeter has a uniform scale with 50 division and gives a full scale reading 10 A. The instrument can read up to (1/5)th of a scale division with a fair degree of certainty. What is the resolution of the instrument in mA?

 25 mA.
 80 mA.
 50 mA.
  40 mA.

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Measurement and Instrumentation
The three resistors R1, R2 and R3 have the following ratings: R1 = 25Ω ± 4%, R2 = 65 Ω ± 4%; R3 =45 Ω ± 4%. If the resistance are connected in series, then limiting error produced in equivalent resistance is

 4%
 2%
 1%
 3%

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MORE MCQ ON Measurement and Instrumentation

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