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Process Control and Instrumentation

Process Control and Instrumentation
Meleoid gauge measures the __________ pressure.

Atmospheric
Positive
Very high
Sub-atmospheric

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Process Control and Instrumentation
Gain margin is equal to the

Gain in P-I controller
Amplitude ratio
Gain in P controller
Reciprocal of amplitude ratio

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Process Control and Instrumentation
The pressure sensing element of elastic type pressure gauge is never made in the form of a

Bellow
Strip
Bourdon tube
Diaphragm

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Process Control and Instrumentation
Humidity of air can be determined by a

Polarimeter
Sling psychrometer
Mass spectrometer
Chromatograph

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Process Control and Instrumentation
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.

> 800
< 0
> 0
< 100

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Process Control and Instrumentation
A first order system with unity gain and time constant τ is subjected to a sinusoidal input of frequency w = 1/τ. The amplitude ratio for this system is

0.25
1/√2
0.5
1

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