Process Control and Instrumentation problems
- 1. 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 Discuss
Correct Answer: critically damped
- 2. An amplitude ratio of 0.1 corresponds to __________ decibels.
Options- A. 20
- B. -20
- C. 10
- D. -10 Discuss
Correct Answer: -20
- 3. Which of the following is not a speed measuring instrument?
Options- A. Psychrometer
- B. Stroboscope
- C. Tachometer
- D. All (a), (b) and (c) Discuss
Correct Answer: Psychrometer
- 4. 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 Discuss
Correct Answer: linear
- 5. 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 Discuss
Correct Answer: heat flow rate
- 6. 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. Discuss
Correct Answer: a monotonic increase.
- 7. Positioning controllers are used for
Options- A. low loads
- B. temperature changes
- C. high loads
- D. flow rate changes Discuss
Correct Answer: high loads
- 8. Which of the following judges the accuracy of an instrument?
Options- A. Dead zone
- B. Drift
- C. Static error
- D. None of these Discuss
Correct Answer: Static error
- 9. The amplitude ratio for the sinusoidal response of a __________ is 1.
Options- A. first order system
- B. second order system
- C. transportation lag
- D. none of these Discuss
Correct Answer: transportation lag
- 10. Paramagnetism method is not used for the composition determination of __________ in gases.
Options- A. oxygen
- B. oxides of nitrogen
- C. carbon dioxide
- D. any of these Discuss
Correct Answer: carbon dioxide
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