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Process Control and Instrumentation

Process Control and Instrumentation
The thermal emf-temperature relationship of most thermocouples is

Exponential
Square root
Linear
Parabolic

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Process Control and Instrumentation
The inverse Laplace transform of the function f(s) = 1/S(1 + S) is

1 - e-t
1 + et
1 + e-t
1 - et

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

Mcleoid gauge
Bourdon guage
Ionisation gauge
Alphatron

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Process Control and Instrumentation
Which of the following is not a second order instrument?

Bare mercury in glass thermometer
None of these
Mercury in glass thermometer with covering
Pressure gauge with one bellow, two tubes and a tank

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is

Pressure rise with temperature
Linear expansion
None of these
Volumetric expansion

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Process Control and Instrumentation
The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.

750
250
1000
500

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