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Process Control and Instrumentation

Process Control and Instrumentation
Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.

1261.93
630.74
961.93
1064.43

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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?

Optical pyrometer
Thermocouples
Photoelectric pyrometer
Radiation pyrometer

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Process Control and Instrumentation
Temperature of __________ can not be measured by an optical or radiation pyrometer.

Hot blast (air) from stoves
Molten slag flowing out of blast furnace
Combustion space in boilers
Rotary limestone calcination kiln

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Process Control and Instrumentation
A non-linear system will have __________ steady state values.

Three
One
More than one
Two

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Process Control and Instrumentation
Temperature measuring instruments are standardised mostly with __________ points of pure substances.

Melting
Neither A nor B Here
Boiling
Both A & B Here

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Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

E-τds
Eτds
Τds + 1
1/(τds + 1)

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