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Chemical Engineering
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Process Control and Instrumentation
Comments
Question
Response of a system to a sinusoidal input is called __________ response.
Options
A. impluse
B. unit step
C. frequency
D. none of these
Correct Answer
frequency
Process Control and Instrumentation problems
Search Results
1. The second order system with the transfer function
has a damping ratio of
Options
A. 2.0
B. 0.5
C. 1.0
D. 4.0
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.5
2. Which of the following is the dynamic characteristics of an instrument?
Options
A. Reproducibility
B. Sensitivity
C. Dead zone
D. Fidelity
Show Answer
Scratch Pad
Discuss
Correct Answer: Fidelity
3. Thermal conductivity measurement com-prises the working principle of a
Options
A. CO
2
analyser
B. polarimeter
C. spectrometer
D. chromatograph
Show Answer
Scratch Pad
Discuss
Correct Answer: CO
2
analyser
4. Esterification reaction
Options
A. produces soap.
B. is reversible.
C. is a reaction between an alcohol and an organic acid.
D. all (a), (b) and (c).
Show Answer
Scratch Pad
Discuss
Correct Answer: all (a), (b) and (c).
5. Pasteurisation of milk means
Options
A. removal of fatty and albuminous substance from it.
B. killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
C. inhibiting the growth of micro-organisms without killing them.
D. none of these.
Show Answer
Scratch Pad
Discuss
Correct Answer: killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
6. Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a
Options
A. thermocouple
B. reistance thermometer
C. mercury in glass thermometer
D. vapor pressure thermometer
Show Answer
Scratch Pad
Discuss
Correct Answer: thermocouple
7. Strain gage pressure transducers are used to measure __________ pressures.
Options
A. gage as well as vacuum
B. absolute as well as differential
C. both (a) and (b)
D. neither (a) nor (b)
Show Answer
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Discuss
Correct Answer: both (a) and (b)
8. Transfer function of transportation lag is
Options
A.
e
TS
B.
e
-TS
C.
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer:
e
-TS
9. Flapper nozzle is used in a/an __________ controller.
Options
A. electronic
B. hydraulic
C. pneumatic
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer: pneumatic
10. Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?
Options
A. Radiation/infrared pyrometer
B. Filled system thermometer
C. Mercury in glass thermometer
D. Thermo electric pyrometer
Show Answer
Scratch Pad
Discuss
Correct Answer: Radiation/infrared pyrometer
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Stoichiometry
has a damping ratio of