Discussion
Home ‣ Chemical Engineering ‣ Process Control and Instrumentation See What Others Are Saying!
- Question
"A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency." This is __________ criterion.
Options- A. Bode stability
- B. Nyquist
- C. Routh stability
- D. none of these
- Correct Answer
- Bode stability
- 1. Fuel economy in furnaces can be achieved by
Options- A. using oxygen enriched combustion air.
- B. preheating the combustion air.
- C. reducing the heat loss through furnace openings & doors.
- D. all (a), (b) and (c). Discuss
- 2. Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.
Options- A. <120
- B. >120
- C. <90
- D. 90-110 Discuss
- 3. Which of the following is not a raw material used for the manufacture of ordinary glass?
Options- A. Iron oxide
- B. Soda ash
- C. Limestone
- D. Silica Discuss
- 4. Diameter of the seive tray column is determined by the
Options- A. lower limit of vapour velocity.
- B. upper limit of the vapour velocity.
- C. hole diameter of the seive tray.
- D. height of the plate spacing. Discuss
- 5. Platinum resistance thermometer is the international standard for temperature measurement between
Options- A. triple point of hydrogen and freezing point of antimony
- B. 13.81°K to 903.9°K
- C. both (a) and (b)
- D. neither (a) nor (b) Discuss
- 6. When vaporisation takes place directly at the heating surface, it is called
Options- A. film boiling
- B. nucleate boiling
- C. vapour binding
- D. none of these Discuss
- 7. Screen capacity is not a function of
Options- A. its openings size.
- B. screening mechanism.
- C. screening surface.
- D. atmospheric humidity. Discuss
- 8. Presence of __________ in water stream are deleterious to aquatic life.
Options- A. soluble and toxic organics.
- B. suspended solids.
- C. heavy metals and cynides.
- D. all (a), (b) & (c). Discuss
- 9. The main type of sludge gas evolved during sewage treatment in Imhoff tank is
Options- A. CO2
- B. CH4
- C. CO
- D. H2 Discuss
- 10. World's worst radioactive pollution was caused by nuclear reactor disaster which occured in
Options- A. Arizona (U.S.A.)
- B. Chernobyl (undivided U.S.S.R.)
- C. Pensylvania (U.S.A.)
- D. Moscow (U.S.S.R.) Discuss
More questions
Correct Answer: all (a), (b) and (c).
Correct Answer: >120
Correct Answer: Iron oxide
Correct Answer: upper limit of the vapour velocity.
Correct Answer: both (a) and (b)
Correct Answer: nucleate boiling
Correct Answer: atmospheric humidity.
Correct Answer: all (a), (b) & (c).
Correct Answer: CH4
Correct Answer: Chernobyl (undivided U.S.S.R.)
Comments
There are no comments.More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.