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Process Control and Instrumentation

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

None of these
Pointer
Bulb
Bourdon tube

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Process Control and Instrumentation
A negative gain margin expressed in decibels means a/an __________ system.

Critically damped
Stable
None of these
Unstable

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Process Control and Instrumentation
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their

High viscosity index
Low electrical conductivity
Low flash point
Low thermal conductivity

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

Electronic
Pneumatic
None of these
Hydraulic

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Process Control and Instrumentation
Response of a linear control system for a change in set point is called

Transient response
Frequency response
Regulator problem
Servo problem

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Process Control and Instrumentation
The unit step response of the transfer function 1/(s² + 2s + 3)

Is overdamped
Is unstable
Has a damped oscillatory characteristics
Has a non-zero slope at the origin

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