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Process Control and Instrumentation

Process Control and Instrumentation
Thermistors are made of

Metal oxides
Ultra pure metals
Iron-copper alloys
Nickel-chromium alloys

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Process Control and Instrumentation
The fluid used in hydraulic controller is

Steam
Air
Oil
Water

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Process Control and Instrumentation
Which of the following thermocouples has the least temperature measurement range?

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

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

Asbestos
Teflon
Fibre glass
Ceramic fibre

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Process Control and Instrumentation
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)The initial value of the corresponding time function is

1
-1
44020
43838

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Process Control and Instrumentation
Pick out the first order system from among the following.

Mercury in glass thermometer kept in boiling water
Interacting system of two tanks in series
Damped vibrator
Non-interacting system of two tanks in series

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