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Process Control and Instrumentation

Process Control and Instrumentation
The level of a liquid under pressure can be determined using

Bubbler system
Differential pressure manometer
Diaphragm box system
Air-trap system

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Process Control and Instrumentation
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Nichrome
Vycor (a glass)
Inconel
Steel

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Process Control and Instrumentation
Stability of a control system containing a transportation lag can be best analysed by

Root locus methods
Frequency response methods
Routh test
None of these

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Process Control and Instrumentation
An amplitude ratio of 0.1 corresponds to __________ decibels.

-10
-20
20
10

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Process Control and Instrumentation
Dead zone in an instrument must be less than __________ percent of the scale.

4
8
0.2
1.5

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Process Control and Instrumentation
Bourdon tube is never made of

Phosphor bronze
Monel metal
Stainless steel
Cast iron

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