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Process Control and Instrumentation

Process Control and Instrumentation
Response of a system to a sinusoidal input is called __________ response.

Impluse
None of these
Frequency
Unit step

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Process Control and Instrumentation
Which of the following is not a second order instrument?

None of these
Bare mercury in glass thermometer
Mercury in glass thermometer with covering
Pressure gauge with one bellow, two tubes and a tank

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Process Control and Instrumentation
A bolometer is

Both A & B Here
An element which senses optical input and delivers thermal output
Neither A nor B Here
Used for the measurement of thermal radiation

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Process Control and Instrumentation
Which thermocouple can be used to measure a temperature of around 1400°C ?

Platinum-platinum+rhodium
Copper-constantan
None of these
Aluminium-chromel

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

250
500
1000
750

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Process Control and Instrumentation
A typical example of a physical system with under damped characteristic is a

Thermocouple kept immersed in a liquid filled thermowell
CSTR with first order reaction
Spring loaded diaphragm valve
U-tube manometer

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