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Process Control and Instrumentation

Process Control and Instrumentation
An amplitude ratio of 0.1 corresponds to __________ decibels.

-20
10
20
-10

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

1000
750
250
500

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Process Control and Instrumentation
Which of the following is not a differential pressure flow meter?

Rotameter
Flow nozzle
Venturimeter
Orificemeter

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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
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

Level
Outlet flow rate
Neither A nor B Here
Both A & B Here

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Process Control and Instrumentation
Nichol's chart deals with

Frequency response values of controllers
R. vs. phase lag of first order
R. vs. phase lag of second order
Closed loop values vs. open loop values

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