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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
1
5
3

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Process Control and Instrumentation
The amplitude ratio for the sinusoidal response of __________ is < 1.

Transportation lag
None of these
First order system
Second order system

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Process Control and Instrumentation
Which of the following controllers has the least maximum deviation?

P-I controller
P-D controller
P-I-D controller
P-controller

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Process Control and Instrumentation
The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.

1000
500
250
750

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Process Control and Instrumentation
Bourdon gauges are used for measuring pressure (kg/cm² )

< atmospheric
< 2 (gauge)
> 10 (absolute)
> 2 (gauge)

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Process Control and Instrumentation
The unit of 'time constant' of a system is the same as that of

Time
None of these
(time)⁻¹
Velocity

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