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Process Control and Instrumentation
Comments
Question
Nichol's chart deals with
Options
A. A.R.
vs
. phase lag of first order.
B. A.R.
vs
. phase lag of second order.
C. closed loop values
vs
. open loop values.
D. frequency response values of controllers.
Correct Answer
closed loop values
vs
. open loop values.
Process Control and Instrumentation problems
Search Results
1. Volumetric expansion is the working principle of the __________ thermometers.
Options
A. mercury in glass
B. constant volume gas
C. vapor pressure
D. bimetallic
Show Answer
Scratch Pad
Discuss
Correct Answer: mercury in glass
2. In a single tank system, the transfer function of level to inlet flow rate is
Options
A.
R
/
TS
B.
R
/(
TS
+ 1)
C. l(
TS
+ l)
D. 1/
TS
Show Answer
Scratch Pad
Discuss
Correct Answer:
R
/(
TS
+ 1)
3. A magnetic flowmeter is
Options
A. based on the principle of Faraday's law.
B. capable of measuring the flow rate of slurries and electrolytes.
C. based on the linear relationship between the fluid flow rate and the induced voltage.
D. all (a), (b) and (c).
Show Answer
Scratch Pad
Discuss
Correct Answer: all (a), (b) and (c).
4. Working principle of radiation pyrometer is based on the
Options
A. Wien's law
B. Kirchoffs law
C. Stafan-Boltzman law
D. Seebeck effect
Show Answer
Scratch Pad
Discuss
Correct Answer: Stafan-Boltzman law
5. The closed loop pole of a stable second order system could be
Options
A. both real and positive.
B. complex conjugate with positive real parts.
C. both real and negative.
D. one real positive and the other real negative.
Show Answer
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Discuss
Correct Answer: both real and negative.
6. Compositional analysis of __________ is done using mass spectrometer.
Options
A. an isotope
B. natural gas
C. a solid
D. an alloy
Show Answer
Scratch Pad
Discuss
Correct Answer: an isotope
7. The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.
Options
A. 250
B. 500
C. 750
D. 1000
Show Answer
Scratch Pad
Discuss
Correct Answer: 500
8. The operation of a rotameter is based on
Options
A. variable flow area.
B. rotation of a turbine.
C. pressure drop across a nozzle.
D. pressure at a stagnation point.
Show Answer
Scratch Pad
Discuss
Correct Answer: variable flow area.
9. Which of the following will give maximum gas conversion?
Options
A. Fixed bed reactor.
B. Fluidised bed reactor.
C. Semi-fluidised bed reactor.
D. Plug-flow catalytic reactor.
Show Answer
Scratch Pad
Discuss
Correct Answer: Semi-fluidised bed reactor.
10. A first order reaction requires two equal sized CSTR. The conversion is
Options
A. less when they are connected in series.
B. more when they are connected in series.
C. more when they are connected in parallel.
D. same whether they are connected in series or in parallel.
Show Answer
Scratch Pad
Discuss
Correct Answer: more when they are connected in series.
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