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Process Control and Instrumentation

Process Control and Instrumentation
Which is the most suitable instrument for measuring pressure below 3 microns?

Ionisation gauge
Alphatron
Bourdon guage
Mcleoid gauge

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

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Process Control and Instrumentation
The amplitude ratio for the sinusoidal response of a __________ is 1.

None of these
Transportation lag
First order system
Second order system

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Process Control and Instrumentation
Liquid discharge from a tank or reservoir can not be measured by

Notches
Weirs
Mouthpieces
Orificemeters

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Process Control and Instrumentation
Mercury manometer (U-tube type) exemplifies a __________ order system.

Third
First
Zero
Second

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Process Control and Instrumentation
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

None of these
Thomson
Peltier
Seebeck

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