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Process Control and Instrumentation
Comments
Question
Which of the following is not a speed measuring instrument?
Options
A. Psychrometer
B. Stroboscope
C. Tachometer
D. All (a), (b) and (c)
Correct Answer
Psychrometer
Process Control and Instrumentation problems
Search Results
1. An amplitude ratio of 0.1 corresponds to __________ decibels.
Options
A. 20
B. -20
C. 10
D. -10
Show Answer
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Discuss
Correct Answer: -20
2. The response of two tanks of same size and resistance in series is
Options
A. under damped
B. critically damped
C. over damped
D. none of the above
Show Answer
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Discuss
Correct Answer: critically damped
3. The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature.
Options
A. pressure
B. volume
C. viscosity
D. all (a), (b) and (c)
Show Answer
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Correct Answer: all (a), (b) and (c)
4. Continuous measurement of moisture in paper is done by
Options
A. sling psychrometer.
B. hair-hygrometer.
C. weighing.
D. high resistance Wheatstone's bridge circuit.
Show Answer
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Discuss
Correct Answer: high resistance Wheatstone's bridge circuit.
5. An ideal PID controller has the transfer function
. The frequency at which the magnitude ratio of the controller is 1, is
Options
A. 0.5/0.2
B. 0.2/0.5
C. 0.2 x 0.5
D. 1/
0.2 x 0.5
Show Answer
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Discuss
Correct Answer: 1/
0.2 x 0.5
6. The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly
Options
A. linear
B. non-linear
C. parabolic
D. hyperbolic
Show Answer
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Correct Answer: linear
7. The term analogous to the electrical current in a thermal system is the
Options
A. temperature difference
B. heat flow rate
C. heat content in the system
D. none of these
Show Answer
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Discuss
Correct Answer: heat flow rate
8. The unit step response of the transfer function
reaches its final steady state assymptotically after
Options
A. a monotonic increase.
B. a monotonic decrease.
C. initially increasing and then decreasing.
D. increasing decreasing and then increasing.
Show Answer
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Discuss
Correct Answer: a monotonic increase.
9. Positioning controllers are used for
Options
A. low loads
B. temperature changes
C. high loads
D. flow rate changes
Show Answer
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Discuss
Correct Answer: high loads
10. Which of the following judges the accuracy of an instrument?
Options
A. Dead zone
B. Drift
C. Static error
D. None of these
Show Answer
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Discuss
Correct Answer: Static error
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