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Process Control and Instrumentation

Process Control and Instrumentation
The term analogous to the electrical current in a thermal system is the

Heat content in the system
None of these
Heat flow rate
Temperature difference

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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
A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same

Speed of response
All of these
Accuracy (± 1% of span)
Temperature measuring range (- 40°C to 450°C)

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Process Control and Instrumentation
Instrumentation in a plant offers the advantage of

Greater operation economy
Greater safety of operation
Better quality of product
All of these

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Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a primary element.

None of these
Bourdon tube
Bulb
Pointer

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Millivolts
Microvolts
Volts
Kilo volts

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