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Process Control and Instrumentation
Comments
Question
Thermal conductivity cell is the primary element of a/an __________ analyser.
Options
A. oxygen
B. carbon dioxide
C. carbon monoxide
D. sulphur dioxide
Correct Answer
carbon dioxide
Process Control and Instrumentation problems
Search Results
1. 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
Scratch Pad
Discuss
Correct Answer: optical pyrometer.
2. Which of the following flow-metering instru-ments is an areameter?
Options
A. Venturimeter
B. Rotameter
C. Pitot tube
D. Hot wire anemometer
Show Answer
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Discuss
Correct Answer: Rotameter
3. E.m.f. generated by thermocouples is of the order of
Options
A. millivolts
B. microvolts
C. volts
D. kilo volts
Show Answer
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Discuss
Correct Answer: millivolts
4. The root locus method, a pole of a transfer function
G
(
s
) is the value of s for which
G
(
s
) approaches
Options
A. -1
B. 0
C. 1
D. ?
Show Answer
Scratch Pad
Discuss
Correct Answer: ?
5. Polarograph is meant for the analysis of
Options
A. gaseous mixture
B. miscible liquids
C. solids
D. isotopes
Show Answer
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Discuss
Correct Answer: solids
6. 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
7. 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
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Discuss
Correct Answer: dielectric constant end loss factor
8. 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
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Discuss
Correct Answer: a first order system.
9. __________ is the static characteristics of an instrument,
Options
A. Response
B. Tine lag
C. Drift
D. dynamic error
Show Answer
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Discuss
Correct Answer: Drift
10. 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.
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