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Process Control and Instrumentation

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

20
30
40
50

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

Bourdon gauge
Inclined tube manometer
Pirani guage
U-tube manometer

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Process Control and Instrumentation
For two non-interacting first order systems connected in series, the overall transfer function is the __________ of the individual transfer functions.

Product
Ratio
Sum
Difference

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Process Control and Instrumentation
Which of the following is not a variable area flow meter?

Magnetic flow meter
Orifice and tapered plug meter
Rotameter
Piston type meter

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Process Control and Instrumentation
__________ thermometer can not measure sub-zero (< 0° C) temperature,

Vapor pressure
Bimetallic
Resistance
Mercury in glass

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Process Control and Instrumentation
Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)

p/nRT
nRT/V
V/nRT
nRT/P

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