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Process Control and Instrumentation

Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

> 1.7 and < 30°
< 1.7 and > 30°
> 1.7 and > 30°
< 1.7 and < 30°

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Process Control and Instrumentation
Load cells are used for the measurement of

Velocity
Stress
Weight
Strain

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Process Control and Instrumentation
Photoelectric pyrometers are suitable in the temperature range of __________ °C.

400-1000
400-1600
800-2500
800-1600

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Process Control and Instrumentation
Which of the following is not a second order instrument?

Bare mercury in glass thermometer
Mercury in glass thermometer with covering
Pressure gauge with one bellow, two tubes and a tank
None of these

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Process Control and Instrumentation
The initial value (t=0) of the unit step response of the transfer function [(s + 1)/(2s + 1)] is

1
43832
2

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Process Control and Instrumentation
Strain gage pressure transducers are used to measure __________ pressures.

Absolute as well as differential
Gage as well as vacuum
Neither A nor B
Both A & B Here

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