Discussion
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- Question
What is the reduction ratio in a fine crushing operation having following feed and product sizes?
Options- A. 0.5
- B. 2
- C. 5
- D. 10
- Correct Answer
- 2
- 1. Limestone is normally crushed in a
Options- A. roll crusher
- B. hammer crusher
- C. ball mill
- D. tube mill Discuss
- 2. Carbon black is pulverised in a
Options- A. hammer crusher
- B. ball mill
- C. roll crusher
- D. gyratory crusher Discuss
- 3. Which of the following is a fine crusher?
Options- A. Blake jaw crusher
- B. Gyratory crusher
- C. Toothed roll crusher
- D. Dodge jaw crusher Discuss
- 4. Which of the following is not used as filter aid?
Options- A. Asbestos
- B. Diatomaceous earth
- C. Purified wood cellulose
- D. Rice husk Discuss
- 5. Which of the following is not used as a surface active agent in a flocculation operation?
Options- A. Sodium silicate
- B. Quartz
- C. Lime
- D. Alumina Discuss
- 6. Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ? = density of material to be crushed, kg/m3 here, V =?N.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)
Options- A. 3.6 V.W.Dr.?
- B. 3.6 V.W. ?
- C. 3.6 W.Dr.?
- D. 3.6 V.W.Dr/? Discuss
- 7. 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
- 8. __________ mill is not a revolving mill.
Options- A. Pebble
- B. Compartment
- C. Cage
- D. Tube Discuss
- 9. 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
- 10. 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
Mechanical Operations problems
Search Results
Correct Answer: hammer crusher
Correct Answer: ball mill
Correct Answer: Toothed roll crusher
Correct Answer: Rice husk
Correct Answer: Quartz
Correct Answer: 3.6 V.W.Dr.?
Correct Answer: 1/?
Correct Answer: Cage
Correct Answer: 2
Correct Answer: laminar
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