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Measurement and Instrumentation

Measurement and Instrumentation
In which of the transformer is the secondary nearly short circuited under normal operating condition?

 Power transformer.
 CT.
 Distribution transformer.
 PT.

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Measurement and Instrumentation
Piezoelectronic accelerometer

 Should be used for low frequency.
 Should use a monitoring source at low input impedance.
 Should be used for high frequencies above 100 Hz.
 Has a low natural frequency.

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Measurement and Instrumentation
The controlling torque of an indicating instrument ______ as the deflection of the moving system increases.

Remains same
None of the listed here
Increases
Decreases

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Measurement and Instrumentation
Basically potential meter is a device for

Comparing two currents
Measuring a voltage
Comparing two voltages
Measuring a current

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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%
 1%
 3%
 2%

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Measurement and Instrumentation
A thermo couple ammeter gives full scale deflection of 10 A, when it reads one fifth of the scale, the current will be

  4.47 A.
 4 A.
 5.78 A.
 2 A.

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