Process Control and Instrumentation problems
- 1. Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an
Options- A. venturimeter
- B. orificemeter
- C. magnetic flow meter
- D. hot wire anemometer Discuss
Correct Answer: magnetic flow meter
- 2. The level of a liquid under pressure can be determined using
Options- A. bubbler system
- B. differential pressure manometer
- C. diaphragm box system
- D. air-trap system Discuss
Correct Answer: differential pressure manometer
- 3. Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing
Options- A. helium
- B. nitrogen
- C. hydrogen
- D. none of these Discuss
Correct Answer: helium
- 4. The term analogous to voltage in a single tank system is the
Options- A. heat content of the system.
- B. liquid volume in the tank.
- C. flow rate.
- D. level of liquid. Discuss
Correct Answer: level of liquid.
- 5. Which is the symbol for "pneumatic control valve"?
Options- A.
- B.
- C.
- D. none of these Discuss
Correct Answer:
- 6. When the damping co-efficient (?) is unity, the system is
Options- A. Overdamped.
- B. Critically damped.
- C. Underdamped.
- D. Highly fluctuating. Discuss
Correct Answer: Critically damped.
- 7. Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an
Options- A. orsat apparatus
- B. thermal conductivity cell
- C. zirconia probe
- D. chromatograph Discuss
Correct Answer: thermal conductivity cell
- 8. Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called
Options- A. dielectrics
- B. insulators
- C. semi conductors
- D. conductors Discuss
Correct Answer: semi conductors
- 9. Which of the following is never used as an element of industrial resistance thermometer?
Options- A. Lead
- B. Nickel
- C. Copper
- D. 30% iron + 70% nickel Discuss
Correct Answer: Lead
- 10. __________ is an example of distributed parameter system
Options- A. Tubular reactor
- B. CSTR
- C. On-off controller
- D. none of these Discuss
Correct Answer: Tubular reactor
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