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Process Control and Instrumentation

Process Control and Instrumentation
Dead zone in an instrument must be less than __________ percent of the scale.

1.5
8
4
0.2

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Process Control and Instrumentation
Strain gage pressure transducers are used to measure __________ pressures.

Absolute as well as differential
Gage as well as vacuum
Neither A nor B
Both A & B Here

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Process Control and Instrumentation
Which of the following controllers has maximum offset?

P-controller
P-I-D controller
P-I controller
P-D controller

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Process Control and Instrumentation
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Nichrome
Inconel
Steel
Vycor (a glass)

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Process Control and Instrumentation
Out of the following themocouple wire insulating material, the highest temperature rating is for

Asbestos
Teflon
Ceramic fibre
Fibre glass

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Process Control and Instrumentation
A system with a double pole at the origin is unstable since the corresponding term in the time domain

Grows linearly with time
Decays linearly with time
Is a constant
Grows exponentially with time

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