Discussion
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- Question
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to
Options- A. d
- B. d2
- C. d3
- D. d4
- Correct Answer
- d4
- 1. Thermistors are used in __________ devices.
Options- A. voltage measuring
- B. temperature measuring
- C. temperature compensating
- D. both(b)&(c) Discuss
- 2. Which of following error integral is considered as the best criterion in controller settings?
Options- A.
- B.
- C.
- D. none of these Discuss
- 3. Out of the following themocouple wire insulating material, the highest temperature rating is for
Options- A. teflon
- B. ceramic fibre
- C. asbestos
- D. fibre glass Discuss
- 4. In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the __________ variable.
Options- A. load
- B. manipulated
- C. controlled
- D. none of these Discuss
- 5. Thermal wells used in temperature measurements should have
Options- A. very thick walls.
- B. low emissivity.
- C. polished surface.
- D. high transmissivity of radiation. Discuss
- 6. Stalagmometer is used for the measurement of
Options- A. kinematic viscosity
- B. surface tension
- C. refractive index
- D. optical activity Discuss
- 7. Phase lag of the frequency response of a second order system to a sinusoidal forcing function
Options- A. is 30°
- B. is 90° at the most
- C. approaches 180° asymptotically
- D. is 120° Discuss
- 8. Zirconia probe is used for the measurement of
Options- A. humidity of air.
- B. % CO2 in flue gas.
- C. % O2 in flue gas.
- D. speed of a submarine. Discuss
- 9. Which of the following fluid flow measuring devices can measure the largest flow rate?
Options- A. V-notch
- B. Rotameter
- C. Orificemeter
- D. Weir Discuss
- 10. Polarograph is meant for the analysis of
Options- A. gaseous mixture
- B. miscible liquids
- C. solids
- D. isotopes Discuss
Process Control and Instrumentation problems
Search Results
Correct Answer: both(b)&(c)
Correct Answer:
Correct Answer: ceramic fibre
Correct Answer: load
Correct Answer: high transmissivity of radiation.
Correct Answer: surface tension
Correct Answer: approaches 180° asymptotically
Correct Answer: % O2 in flue gas.
Correct Answer: Weir
Correct Answer: solids
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