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Process Control and Instrumentation

Process Control and Instrumentation
Identify an unbounded input from inputs whose transfer functions are given below

1/S
1/S²
1
1/(S² + 1)

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Process Control and Instrumentation
Phase lag of the sinusoidal response of a first order system is

90°
30°
120°
180°

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Process Control and Instrumentation
Maximum differential pressure in liquid manometer is __________ psi.

50
20
40
30

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Process Control and Instrumentation
Compositional analysis of __________ is done using mass spectrometer.

An isotope
Natural gas
An alloy
A solid

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Process Control and Instrumentation
In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is

H(1 + G)
G/(1 + H)
G/H
H/G

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Process Control and Instrumentation
A bolometer is

Neither A nor B Here
Used for the measurement of thermal radiation
Both A & B Here
An element which senses optical input and delivers thermal output

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