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Process Control and Instrumentation

Process Control and Instrumentation
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

Level
Both A & B Here
Neither A nor B Here
Outlet flow rate

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Process Control and Instrumentation
Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1).

W = 1/√14, Kc = 45/7√14
W = 1, Kc = 13
W = √(7/8), Kc = 45/4
W = √(7/6), Kc = 46/3

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

Inclined tube manometer
U-tube manometer
Pirani guage
Bourdon gauge

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Process Control and Instrumentation
Thermal conductivity measurement com-prises the working principle of a

Spectrometer
Chromatograph
Polarimeter
CO₂ analyser

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Process Control and Instrumentation
Dead zone in an instrument must be less than __________ percent of the scale.

0.2
1.5
4
8

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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)

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

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