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Process Control and Instrumentation

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

43832
1
2

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Process Control and Instrumentation
Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.

1261.93
1064.43
961.93
630.74

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

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

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Process Control and Instrumentation
Measurement of pressure in ammonia reactor is done by

U-tube manometer
Bourdon gauge
Pirani guage
Inclined tube manometer

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Process Control and Instrumentation
The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

1
-1
∞

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

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

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