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Chemical Engineering
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Process Control and Instrumentation
Comments
Question
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
Correct Answer
differential pressure manometer
Process Control and Instrumentation problems
Search Results
1. 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
Scratch Pad
Discuss
Correct Answer: magnetic flow meter
2. Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature
Options
A. emf produced is very low of the order of microvolt.
B. embrittlement of iron occurs.
C. rusting of iron takes place.
D. both (b) and (c).
Show Answer
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Discuss
Correct Answer: both (b) and (c).
3. A simple pitot tube measures the
Options
A. average velocity
B. maximum velocity
C. point velocity
D. static pressure
Show Answer
Scratch Pad
Discuss
Correct Answer: static pressure
4. A pyrheliometer is an instrument used for measuring the
Options
A. bright sunshine period.
B. beam radiation.
C. diffuse radiation.
D. none of these.
Show Answer
Scratch Pad
Discuss
Correct Answer: beam radiation.
5. __________ is the static characteristics of an instrument,
Options
A. Response
B. Tine lag
C. Drift
D. dynamic error
Show Answer
Scratch Pad
Discuss
Correct Answer: Drift
6. 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
Scratch Pad
Discuss
Correct Answer: helium
7. 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
Scratch Pad
Discuss
Correct Answer: level of liquid.
8. Which is the symbol for "pneumatic control valve"?
Options
A.
B.
C.
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer:
9. When the damping co-efficient (?) is unity, the system is
Options
A. Overdamped.
B. Critically damped.
C. Underdamped.
D. Highly fluctuating.
Show Answer
Scratch Pad
Discuss
Correct Answer: Critically damped.
10. 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
Scratch Pad
Discuss
Correct Answer: thermal conductivity cell
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