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Process Control and Instrumentation

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

43838
-1
44020
1

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Process Control and Instrumentation
0n-off control which is a special case of proportional control, has a band width of about __________ percent.

75
100
25

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Process Control and Instrumentation
Flapper nozzle is used in a/an __________ controller.

Pneumatic
Electronic
Hydraulic
None of these

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Process Control and Instrumentation
A non-linear chemical system is exemplified by a/an

None of these
Non-isothermal CSTR
Mixer
Isothermal CSTR

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Process Control and Instrumentation
Thermocouple in a thermal well behaves as a true

First order system
Multiple first order system
Second order system (underdamped)
Second order system (overdamped)

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Process Control and Instrumentation
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the

Alcohol filled thermometer
Mercury in glass thermometer
Optical pyrometer
Iron-constantan thermocouple

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