Discussion
Home ‣ Chemical Engineering ‣ Process Control and Instrumentation See What Others Are Saying!
- Question
In a closed loop system, the process to be controlled is an integrating process with transfer function l/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit
Options- A. overdamped response.
- B. underdamped response.
- C. undamped response.
- D. unstable response.
- Correct Answer
- underdamped response.
- 1. Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of
Options- A. mixing
- B. adsorption
- C. wetting
- D. complete wetting Discuss
- 2. Lug support is meant for supporting __________ vessels.
Options- A. large horizontal cylindrical
- B. tall but empty
- C. small
- D. thick walled tall Discuss
- 3. Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid
Options- A. containing suspended solids flows at low velocity.
- B. containing suspended solids flows at high velocity.
- C. is highly viscous.
- D. is of high specific gravity. Discuss
- 4. Which of the following does not come under the sales expenses for a product of a chemical plant?
Options- A. Advertising
- B. Warehousing
- C. Legal fees
- D. Customer service. Discuss
- 5. __________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.).
Options- A. Hemispherical
- B. Dished
- C. Ellipsoidal
- D. Conical Discuss
- 6. In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for
Options- A. reducing scale deposition.
- B. increasing pressure drop.
- C. fixing the tubes.
- D. creating turbulence. Discuss
- 7. Circulation of gases in furnace is caused by the
Options- A. change in volume during a change of temperature.
- B. difference in density between hot and cold gases.
- C. furnace pressure in conjunction with draft in flues.
- D. all (a), (b) and (c). Discuss
- 8. Pick out the wrong statement.
Options- A. Higher specific gravity of petroleum products means higher C/H ratio.
- B. Aromatics have lower specific gravity than corresponding paraffins.
- C. Hydrocarbons of low specific gravity (e.g, paraffins) possess the maximum thermal energy per unit volume.
- D. Hydrocarbons of high specific gravity (eg, aromatics) possess the maximum thermal energy per unit weight. Discuss
- 9. If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.
Options- A. sidefired
- B. underfired
- C. covered
- D. recirculating Discuss
- 10. The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)
Options- A. 0.5 d
- B. 0.75 d
- C. d
- D. 2 d Discuss
More questions
Correct Answer: complete wetting
Correct Answer: small
Correct Answer: containing suspended solids flows at low velocity.
Correct Answer: Legal fees
Correct Answer: Ellipsoidal
Correct Answer: creating turbulence.
Correct Answer: all (a), (b) and (c).
Correct Answer: Aromatics have lower specific gravity than corresponding paraffins.
Correct Answer: underfired
Correct Answer: d
Comments
There are no comments.More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.