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Process Control and Instrumentation

Process Control and Instrumentation
The temperature range for which copper resistance thermometer can be used is __________ °C

0 to 150
350 to 750
-200 to 150
500 to 900

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Process Control and Instrumentation
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an

Either B or C
Optical pyrometer
Chromel-alumel thermocouple
Radiation pyrometer

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Process Control and Instrumentation
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?

Vapor pressure thermometer
Mercury in glass thermometer
Radiation pyrometer
Platinum resistance thermometer

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Process Control and Instrumentation
For two non-interacting first order systems connected in series, the overall transfer function is the __________ of the individual transfer functions.

Product
Ratio
Sum
Difference

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Process Control and Instrumentation
The open loop transfer function of a control system is KR/(1 + TS) . This represents

A first order time lag
A first order system
A second order system
Dead time system

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Process Control and Instrumentation
Characteristic equation is the denominator of __________ loop transfer function.

Closed
Open
Both A & B Here
Neither A Nor B Here

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