Process Control and Instrumentation problems
- 1. Humidity of air can be determined by a
Options- A. chromatograph
- B. sling psychrometer
- C. mass spectrometer
- D. polarimeter Discuss
Correct Answer: sling psychrometer
- 2. Concentration of sugar solution can be determined by the
Options- A. polarimetry
- B. flame photometry
- C. emission spectroscopy
- D. oscillometry Discuss
Correct Answer: polarimetry
- 3. Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.
Options- A. 0-100
- B. < 0
- C. > 100.
- D. > 50 Discuss
Correct Answer: > 100.
- 4. Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.
Options- A. no change
- B. decrease
- C. increase
- D. exponential decrease Discuss
Correct Answer: increase
- 5. Specific gravity of a liquid can not be measured by a/an
Options- A. anemometer
- B. specific gravity bottle
- C. pycnometer
- D. hydrometer Discuss
Correct Answer: anemometer
- 6. The frequency response of a first order system, has a phase shift with lower and upper bounds given by
Options- A. - ?, ?/2
- B. -?/2, ?/2
- C. -?/2, 0
- D. 0, ?/2 Discuss
Correct Answer: 0, ?/2
- 7. Which of the following can not measure a temperature of 1600°C?
Options- A. Platinum resistance thermometer
- B. Thermocouple
- C. Photo-electric pyrometer
- D. Radiation pyrometer Discuss
Correct Answer: Platinum resistance thermometer
- 8. Degree to which an instrument indicates the changes in measured variable without dynamic error is called its
Options- A. speed of response
- B. reproducibility
- C. fidielity
- D. static characteristics Discuss
Correct Answer: fidielity
- 9. The transfer function for a P-D controller is
Options- A. Kc(1+?D s)
- B. Kc(1 +1/?D s)
- C. Kc ?D s
- D. Kc/?D s Discuss
Correct Answer: Kc(1+?D s)
- 10. Flow rate of a river is measured by a/an
Options- A. pitot tube
- B. vane meter
- C. kennison nozzle
- D. open weir Discuss
Correct Answer: vane meter
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