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Process Control and Instrumentation

Process Control and Instrumentation
The second order system with the transfer function 4/(S² + 2S + 4) has a damping ratio of

0.5
2.0
4.0
1.0

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Process Control and Instrumentation
A mercury barometer measures the __________ pressure.

Absolute
Gauge
Vacuum
Atmospheric

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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 - et
1 + e-t

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Process Control and Instrumentation
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is

36
68
54
12

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Process Control and Instrumentation
Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

Reistance thermometer
Thermocouple
Mercury in glass thermometer
Vapor pressure thermometer

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Process Control and Instrumentation
__________ is undesirable in thermocouples used in industries,

Oxidation resistance
Corrosion resistance
Non-linear relation of emf to temperature
Linear relation of emf to temperature

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