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Process Control and Instrumentation
Comments
Question
When the damping co-efficient (?) is unity, the system is
Options
A. Overdamped.
B. Critically damped.
C. Underdamped.
D. Highly fluctuating.
Correct Answer
Critically damped.
Process Control and Instrumentation problems
Search Results
1. Which is the symbol for "pneumatic control valve"?
Options
A.
B.
C.
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer:
2. The term analogous to voltage in a single tank system is the
Options
A. heat content of the system.
B. liquid volume in the tank.
C. flow rate.
D. level of liquid.
Show Answer
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Discuss
Correct Answer: level of liquid.
3. Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing
Options
A. helium
B. nitrogen
C. hydrogen
D. none of these
Show Answer
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Discuss
Correct Answer: helium
4. The level of a liquid under pressure can be determined using
Options
A. bubbler system
B. differential pressure manometer
C. diaphragm box system
D. air-trap system
Show Answer
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Discuss
Correct Answer: differential pressure manometer
5. Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an
Options
A. venturimeter
B. orificemeter
C. magnetic flow meter
D. hot wire anemometer
Show Answer
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Discuss
Correct Answer: magnetic flow meter
6. Compositional analysis of flue gas coming out of a furnace in respect of O
2
and CO
2
% can be continuously done by a/an
Options
A. orsat apparatus
B. thermal conductivity cell
C. zirconia probe
D. chromatograph
Show Answer
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Discuss
Correct Answer: thermal conductivity cell
7. Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called
Options
A. dielectrics
B. insulators
C. semi conductors
D. conductors
Show Answer
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Discuss
Correct Answer: semi conductors
8. Which of the following is never used as an element of industrial resistance thermometer?
Options
A. Lead
B. Nickel
C. Copper
D. 30% iron + 70% nickel
Show Answer
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Discuss
Correct Answer: Lead
9. __________ is an example of distributed parameter system
Options
A. Tubular reactor
B. CSTR
C. On-off controller
D. none of these
Show Answer
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Discuss
Correct Answer: Tubular reactor
10. "An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall". This is the working principle of a
Options
A. pH meter
B. polarimeter
C. chromatograph
D. polarograph
Show Answer
Scratch Pad
Discuss
Correct Answer: pH meter
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