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Process Control and Instrumentation

Process Control and Instrumentation
Cascade control means

Feed forward control
On-off control
One feed-back loop
More than one feed-back loop

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Process Control and Instrumentation
A manometer measures the __________ pressure.

None of these
Absolute
Atmospheric
Gauge

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

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

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Process Control and Instrumentation
Dome temperature of blast furnace stove is most accurately measured by a

Radiation pyrometer
Platinum-platinum/rhodium ther-mocuple
Platinum resistance thermometer
Iron-constantan thermocouple

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Process Control and Instrumentation
Thermistors are used in __________ devices.

Both B & C
Voltage measuring
Temperature compensating
Temperature measuring

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Process Control and Instrumentation
Out of the following themocouple wire insulating material, the highest temperature rating is for

Fibre glass
Teflon
Ceramic fibre
Asbestos

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