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Process Control and Instrumentation

Process Control and Instrumentation
A system with transfer function (2S/4S) + 1 is of __________ order.

3rd
Zero
1st
2nd

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Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a functioning element.

None of these
Pointer
Bourdon tube
Bulb

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Process Control and Instrumentation
The term analogous to voltage in a single tank system is the

Heat content of the system
Level of liquid
Liquid volume in the tank
Flow rate

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Process Control and Instrumentation
In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is

H(1 + G)
G/H
G/(1 + H)
H/G

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Process Control and Instrumentation
On-off controllers are normally used for

None of these
Temperature changes
Low loads
Flow rate changes

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Process Control and Instrumentation
Dead zone is the

None of these
Maximum change in the variable that does not change the reading of the instrument
Same as transportation lag
Same as time constant

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