Mechanical Operations problems
- 1. Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to __________ and the cycle time (where, ? = filtrate viscosity Rm = filter medium resistance Rc = cake resistance ).
Options- A. ?
- B. 1/?
- C. 1/?
- D. 1/?2 Discuss
Correct Answer: 1/?
- 2. __________ mill is not a revolving mill.
Options- A. Pebble
- B. Compartment
- C. Cage
- D. Tube Discuss
Correct Answer: Cage
- 3. The ratio of the actual mesh dimension of Taylor series to that of the next smaller screen is
Options- A. 2
- B. 2
- C. 1.5
- D. 3 Discuss
Correct Answer: 2
- 4. In case of a plate and frame filter press, filtrate flow through the cake follows __________ flow.
Options- A. plug
- B. turbulent
- C. laminar
- D. none of these Discuss
Correct Answer: laminar
- 5. Dispersion of a gas through liquid is done by using a
Options- A. sparger
- B. kneader
- C. masticator
- D. none of these Discuss
Correct Answer: sparger
- 6. __________ is a cohesive solid.
Options- A. Wheat
- B. Sand
- C. Wet clay
- D. none of these Discuss
Correct Answer: Wet clay
- 7. Screen capacity is proportional to (where, S = screen aperture)
Options- A. S
- B. 1/S
- C. S2
- D. S Discuss
Correct Answer: S
- 8. For the transportation of ultrafine particles, the equipment used is a........conveyor.
Options- A. belt
- B. pneumatic
- C. screw
- D. none of these Discuss
Correct Answer: pneumatic
- 9. The most suitable equipment for the transportation of 200 mesh size particles is a
Options- A. bucket elevator
- B. pneumatic conveyor
- C. screw conveyor
- D. belt conveyor Discuss
Correct Answer: pneumatic conveyor
- 10. For benefication of iron ore, the most commonly used method is
Options- A. flocculation.
- B. froth floatation.
- C. jigging & tabling.
- D. none of these. Discuss
Correct Answer: jigging & tabling.
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