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- Question
In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.
Options- A. secondary
- B. fine
- C. primary
- D. ultrafine
- Correct Answer
- primary
- 1. Rock phosphate used for the production of phosphatic fertiliser is mined at
Options- A. Amjhor (Jharkhand)
- B. Talchar (Orissa)
- C. Bailladella (M.P.)
- D. Kiriburu (Bihar) Discuss
- 2. In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.
Options- A. outlet flow rate
- B. level
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 3. 'If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the
Options- A. pressure
- B. temperature
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 4. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.
Options- A. 5
- B. 15
- C. 7.5
- D. 50 Discuss
- 5. Reaction of nitric acid and sulphuric acid with phosphate rock produces
Options- A. nitrophosphate
- B. diammonium phosphate
- C. tricresyl phosphate
- D. tributyl phosphate Discuss
- 6. Polarograph is meant for the analysis of
Options- A. gaseous mixture
- B. miscible liquids
- C. solids
- D. isotopes Discuss
- 7. Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of
Options- A. comparatively higher pressure drop.
- B. high cost of the high pressure vessel used for the reactor.
- C. higher pumping cost.
- D. chances of entrainment and disturbance of catalyst bed. Discuss
- 8. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher
Options- A. densities
- B. melting point
- C. tensile strength
- D. hardness, rigidity & brittleness Discuss
- 9. Reaction of anhydrous liquid ammonia with orthophosphoric acid produces
Options- A. ammonium phosphate
- B. superphosphate
- C. triple superphosphate
- D. none of these Discuss
- 10. Raw materials for nitric acid manufacture are
Options- A. hydrogen peroxide, air and water.
- B. anhydrous ammonia and air.
- C. anhydrous ammonia, air and water.
- D. wet ammonia, air and water. Discuss
More questions
Correct Answer: Amjhor (Jharkhand)
Correct Answer: outlet flow rate
Correct Answer: temperature
Correct Answer: 15
Correct Answer: nitrophosphate
Correct Answer: solids
Correct Answer: high cost of the high pressure vessel used for the reactor.
Correct Answer: hardness, rigidity & brittleness
Correct Answer: ammonium phosphate
Correct Answer: anhydrous ammonia, air and water.
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