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Process Control and Instrumentation

Process Control and Instrumentation
Composition of natural gas is determined by the

Haldane apparatus
Both B and C
Chromatograph
Mass spectrometer

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Process Control and Instrumentation
Number of poles in a system with transfer function 1/(s² + 2s² + 1) is

2
5
3
1

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Process Control and Instrumentation
Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 - 1600°C?

Photoelectric pyrometer
Radiation pyrometer
Optical pyrometer
Thermocouples

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Process Control and Instrumentation
Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.

Radiation pyrometer
Bimetallic thermometer
None of these
Mercury thermometer

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

Transient response
Servo problem
Regulator problem
Frequency response

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Process Control and Instrumentation
Which of the following is an undesirable dynamic characteristic of an instrument?

Reproducibility
Static error
Dead zone
Time lag

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