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- Question
Aniline point is a property of the
Options- A. diesel
- B. LPG
- C. naphtha
- D. gasoline
- Correct Answer
- naphtha
- 1. Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?
Options- A. Cresylic acid
- B. Copper sulphate
- C. Calcium carbonate
- D. Sodium carbonate Discuss
- 2. Final product of uranium extraction plant at Jadugoda (Bihar) is
Options- A. uranium
- B. uranium oxide
- C. uranium carbide
- D. magnesium diuranate Discuss
- 3. The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the
Options- A. bacterial stability factor.
- B. relative stability.
- C. biological oxygen demand (BOD).
- D. oxygen ion concentration. Discuss
- 4. Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
Options- A. by chemical coagulation.
- B. in sedimentation tanks equipped with mechanical scrapper.
- C. in vacuum filter.
- D. in clarifiers. Discuss
- 5. Ordinary water is not used as a moderator because, it
Options- A. has a low absorption cross-section.
- B. has a low scattering cross-section.
- C. absorbs neutrons.
- D. does not absorb neutrons. Discuss
- 6. Scale formation in boiler is controlled by
Options- A. preheating of feed water.
- B. reduction in hardness, silica & alumina in feed water.
- C. keeping the pH value of feed water just below 7.
- D. eliminating H2S in feed water. Discuss
- 7. Pick out the correct statement
Options- A. Centre to centre distance between two consecutives rivets in a row is called the pitch.
- B. A rivetted joint made in overlapping plates is called butt joint.
- C. Hole size drilled in rivetted plates is less than the actual size of the rivet.
- D. none of these. Discuss
- 8. Aerobic biological oxidation ponds used for the purification of polluted water
Options- A. destroys/removes pathogen from the sewage.
- B. is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents.
- C. destroys/removes pathogen much more effectively if the sewage is chlorinated.
- D. all (a), (b) & (c). Discuss
- 9. Sudden fall of atmospheric pressure by a large amount is an indication of the
Options- A. rain
- B. cold wave
- C. storm
- D. fair weather Discuss
- 10. The energy consumed by a ball mill depends on
Options- A. its speed.
- B. its ball load.
- C. the density of the material being ground.
- D. all (a), (b) and (c). Discuss
More questions
Correct Answer: Copper sulphate
Correct Answer: magnesium diuranate
Correct Answer: relative stability.
Correct Answer: in sedimentation tanks equipped with mechanical scrapper.
Correct Answer: absorbs neutrons.
Correct Answer: reduction in hardness, silica & alumina in feed water.
Correct Answer: Centre to centre distance between two consecutives rivets in a row is called the pitch.
Correct Answer: all (a), (b) & (c).
Correct Answer: storm
Correct Answer: all (a), (b) and (c).
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