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Process Control and Instrumentation

Process Control and Instrumentation
Number of poles in a system with transfer function 1/(s² + 2s² + 1) is

2
5
1
3

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Process Control and Instrumentation
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?

Iron-constantan
Copper-constantan
Platinum-platinum + rhodium
Chromel-alumel

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Process Control and Instrumentation
Characteristic equation is the denominator of __________ loop transfer function.

Both A & B Here
Open
Neither A Nor B Here
Closed

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Process Control and Instrumentation
A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.

-60.9
-11.9
-38.9
-80.9

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

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

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Process Control and Instrumentation
Liquid column manometers are used for measuring the pressure __________ kgf/cm² .

< 10 (gage)
> 2(gage)
< atmospheric
< 3 (gage)

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