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Measurement and Instrumentation

Measurement and Instrumentation
Which of the following meter is most suitable for measuring radio frequency currents?

  Thermocouple meter.
 Moving - coil meter.
 Moving - iron meter.
 VTVM.

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Measurement and Instrumentation
_______ is used to measure the flow of air around aeroplane.

 Orifice.
 nucleus.
  Anemometer.
 Venturimeter.

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Measurement and Instrumentation
The absolute measurement of resistance is done by

Lorenz method
Bridge Method
Ohm’s law method
Rayleigh method

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Measurement and Instrumentation
Commonly used standard capacitor is

Spherical type
Concentric cylindrical type
Electrostatic type
Multiplate parallel plate type

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Measurement and Instrumentation
Relative error is same as

None of these
 ratio of absolute error and true value.
 absolute error.
 true error.

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Measurement and Instrumentation
A single phase load is connected between R and Y terminals of a 415 V, symmetrical, 3-phase, 4 wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging. The wattmeter will read

 - 795 W.
 + 795 W.
 + 597 W.
  - 597 W.

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