Discussion
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- Question
If radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the
Options- A. linear speed of the basket is doubled.
- B. linear speed of the basket is halved.
- C. centrifugal force is doubled.
- D. capacity of centrifuge is increased.
- Correct Answer
- centrifugal force is doubled.
- 1. Mixer used for rubber compounding is
Options- A. mixer-extruder
- B. banbury internal mixer
- C. muller mixer
- D. pug mill Discuss
- 2. Vertical transportation of materials can be done by a/an
Options- A. apron conveyor
- B. pneumatic conveyor
- C. bucket elevator
- D. both(b)&(c) Discuss
- 3. Which of the following is not a cutting machine?
Options- A. Dicers
- B. Knife cutters
- C. Slitters
- D. Tube mills Discuss
- 4. Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid.
Options- A. viscosity
- B. thermal conductivity
- C. surface tension
- D. density Discuss
- 5. The equivalent diameter of channel of a constant non-circular cross-section of 3 cm by 6 cm will be __________ cms.
Options- A. 20
- B. 12
- C. 8
- D. 2 Discuss
- 6. The ratio of the area of openings in one screen (Taylor series) to that of the openings in the next smaller screen is
Options- A. 1.5
- B. 1
- C. 2
- D. none of these Discuss
- 7. Which of the following is not accomplished by agitation of liquids in agitators?
Options- A. Dispersing gas in liquid.
- B. Blending of immiscible liquids.
- C. Dispersing immiscible liquid in form of emulsion.
- D. Suspending solid particles. Discuss
- 8. A compressible cake has the
Options- A. maximum porosity at the upstream side.
- B. maximum porosity at the filter medium.
- C. same porosity throughout the cake thickness.
- D. none of these. Discuss
- 9. Filter medium resistance is important during the __________ of filtration.
Options- A. early stages.
- B. final stages.
- C. entire process.
- D. none of these. Discuss
- 10. For spheres, the specific surface shape factor is given by
Options- A. AD/V
- B. D/V
- C. A/V
- D. AD/V Discuss
Mechanical Operations problems
Search Results
Correct Answer: banbury internal mixer
Correct Answer: both(b)&(c)
Correct Answer: Tube mills
Correct Answer: density
Correct Answer: 2
Correct Answer: none of these
Correct Answer: Blending of immiscible liquids.
Correct Answer: maximum porosity at the upstream side.
Correct Answer: early stages.
Correct Answer: AD/V
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