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Chemical Engineering
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Process Control and Instrumentation
Comments
Question
__________ is the static characteristics of an instrument,
Options
A. Response
B. Tine lag
C. Drift
D. dynamic error
Correct Answer
Drift
Process Control and Instrumentation problems
Search Results
1. The open loop transfer function of a control system is
. This represents
Options
A. a first order system.
B. dead time system.
C. a first order time lag.
D. a second order system.
Show Answer
Scratch Pad
Discuss
Correct Answer: a first order system.
2. Presence of a small amount of water in the organic systems can be determined by the __________ method.
Options
A. electrical conductivity
B. polarimetry
C. emission spectroscopy
D. dielectric constant end loss factor
Show Answer
Scratch Pad
Discuss
Correct Answer: dielectric constant end loss factor
3. Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is
Options
A. water
B. carbon tetrachloride
C. paraffin
D. ethylene glycol
Show Answer
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Discuss
Correct Answer: paraffin
4. Thermal conductivity cell is the primary element of a/an __________ analyser.
Options
A. oxygen
B. carbon dioxide
C. carbon monoxide
D. sulphur dioxide
Show Answer
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Discuss
Correct Answer: carbon dioxide
5. Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the
Options
A. mercury in glass thermometer.
B. optical pyrometer.
C. iron-constantan thermocouple.
D. alcohol filled thermometer.
Show Answer
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Discuss
Correct Answer: optical pyrometer.
6. 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.
7. A simple pitot tube measures the
Options
A. average velocity
B. maximum velocity
C. point velocity
D. static pressure
Show Answer
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Discuss
Correct Answer: static pressure
8. 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).
9. 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
10. 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
Scratch Pad
Discuss
Correct Answer: differential pressure manometer
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