Discussion
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- Question
The transfer function of a process is
. If a step change is introduced into the system, then the response will be
Options- A. under damped
- B. critically damped
- C. over damped
- D. none of these
- Correct Answer
- under damped
- 1. Bode diagram are generated from output response of the system subjected to which of the following input?
Options- A. Impulse
- B. Step
- C. Ramp
- D. Sinusoidal Discuss
- 2. A bolometer is
Options- A. used for the measurement of thermal radiation.
- B. an element which senses optical input and delivers thermal output.
- C. both (a) & (b).
- D. neither (a) nor (b). Discuss
- 3. Which of the following is not a differential pressure flow meter?
Options- A. Rotameter
- B. Flow nozzle
- C. Orificemeter
- D. Venturimeter Discuss
- 4. A typical example of a physical system with under damped characteristic is a
Options- A. U-tube manometer.
- B. spring loaded diaphragm valve.
- C. CSTR with first order reaction.
- D. thermocouple kept immersed in a liquid filled thermowell. Discuss
- 5. Mass spectrometer is used for the composition analysis of
Options- A. alloys
- B. solids
- C. isotopes
- D. none of these Discuss
- 6. Stability of a control system containing a transportation lag can be best analysed by
Options- A. Routh test
- B. root locus methods
- C. frequency response methods
- D. none of these Discuss
- 7. When a bare thermocouple is covered by a protective sheath, the response becomes
Options- A. faster and oscillatory.
- B. faster and non-oscillatory.
- C. slower and oscillatory.
- D. slower and non-oscillatory. Discuss
- 8. Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by
Options- A. making the volume of thermometer bulb as large as conveniently possible.
- B. reducing the volume of the capillary to a minimum.
- C. reducing the volume of the receiving element to a minimum.
- D. all 'a', 'b' & 'c'. Discuss
- 9. Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.
Options- A. antimony
- B. gold
- C. silver
- D. nickel Discuss
- 10. Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.
Options- A. 63.2
- B. 87.5
- C. 95
- D. 100 Discuss
Process Control and Instrumentation problems
Search Results
Correct Answer: Sinusoidal
Correct Answer: both (a) & (b).
Correct Answer: Rotameter
Correct Answer: spring loaded diaphragm valve.
Correct Answer: isotopes
Correct Answer: frequency response methods
Correct Answer: slower and non-oscillatory.
Correct Answer: all 'a', 'b' & 'c'.
Correct Answer: gold
Correct Answer: 95
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