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Process Control and Instrumentation

Process Control and Instrumentation
Thermistors are made of

Iron-copper alloys
Nickel-chromium alloys
Metal oxides
Ultra pure metals

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Process Control and Instrumentation
Bimetal strips are not used in

Relays for opening & closing of electrical circuits
Thermostats
Bimetallic thermometers
Thermocouples

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Process Control and Instrumentation
Gas chromatography is used for the measurement of

Concentration
Pressure
Temperature
Flow rate

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Process Control and Instrumentation
Range of hydrogen gas constant volume themometer is __________ °C.

-10 to 20
100 - 500
400 - 1000
0 to 100

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Process Control and Instrumentation
Liquid flow rate in an open channel can not be measured by a/an

V-notch
Orifice meter
Rectangular weir
Cipolletti weir

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

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