Process Control and Instrumentation problems
- 1. Which of following error integral is considered as the best criterion in controller settings?
Options- A.
- B.
- C.
- D. none of these Discuss
Correct Answer:
- 2. Thermistors are used in __________ devices.
Options- A. voltage measuring
- B. temperature measuring
- C. temperature compensating
- D. both(b)&(c) Discuss
Correct Answer: both(b)&(c)
- 3. 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 Discuss
Correct Answer: d4
- 4. Stalagmometer is used for the measurement of
Options- A. kinematic viscosity
- B. surface tension
- C. refractive index
- D. optical activity Discuss
Correct Answer: surface tension
- 5. 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
Correct Answer: approaches 180° asymptotically
- 6. 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
Correct Answer: % O2 in flue gas.
- 7. 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
Correct Answer: Weir
- 8. Polarograph is meant for the analysis of
Options- A. gaseous mixture
- B. miscible liquids
- C. solids
- D. isotopes Discuss
Correct Answer: solids
- 9. The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches
Options- A. -1
- B. 0
- C. 1
- D. ? Discuss
Correct Answer: ?
- 10. E.m.f. generated by thermocouples is of the order of
Options- A. millivolts
- B. microvolts
- C. volts
- D. kilo volts Discuss
Correct Answer: millivolts
More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.