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Process Control and Instrumentation

Process Control and Instrumentation
Maximum differential pressure in liquid manometer is __________ psi.

20
30
50
40

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Process Control and Instrumentation
Which of the following can measure temperatures in the range of - 20 to 300°C ?

None of these
Mercury in glass thermometer
Resistance thermometer
Vapor pressure thermometer

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Process Control and Instrumentation
Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.

- 79 and 395
- 51 and 439
- 39 and 350
- 10 and 425

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

Static error
Time lag
Reproducibility
Dead zone

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

5
1
2
3

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