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Process Control and Instrumentation

Process Control and Instrumentation
Range of hydrogen gas constant volume themometer is __________ °C.

400 - 1000
0 to 100
-10 to 20
100 - 500

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Process Control and Instrumentation
A bolometer is

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

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Process Control and Instrumentation
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

Either A, B or C
Iron-constantan
Platinum-platinum+rhodium
Chromel-alumel

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Process Control and Instrumentation
Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?

Radiation/infrared pyrometer
Mercury in glass thermometer
Filled system thermometer
Thermo electric pyrometer

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Process Control and Instrumentation
Which of the following does not figure in the list of seven substances selected for international temperature scale?

Oxygen and sulphur (B.P)
Ice (F.P) and steam (B.P)
Antimony and silver (F.P)
Zinc (B.P) and mercury (F.P)

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Process Control and Instrumentation
Which of the following flow-metering instru-ments is an areameter?

Rotameter
Pitot tube
Hot wire anemometer
Venturimeter

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