Discussion
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- Question
For a particle settling in water at its terminal settling velocity, which of the following is true?
Options- A. Buoyancy = weight + drag
- B. Weight = buoyancy + drag
- C. Drag = buoyancy + weight
- D. Drag = weight
- Correct Answer
- Weight = buoyancy + drag
- 1. Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because
Options- A. it is hygroscopic and explosive in nature.
- B. it is highly acidic in nature.
- C. it is a liquid at room temperature.
- D. its nitrogen content is very less. Discuss
- 2. The main industrial source of emission of hydrogen sulphide air pollutant is
Options- A. petroleum refineries.
- B. coal based thermal power plants.
- C. pulp and paper plant.
- D. metallurgical roasting & smelting plant. Discuss
- 3. Phosphoric acid is produced in wet process from phosphate rock and
Options- A. dilute H2SO4
- B. concentrated H2SO4
- C. concentrated NHO3
- D. concentrated HCl Discuss
- 4. Triple superphosphate is chemically represented as
Options- A. CaF2.3Ca3(PO4)2
- B. 3Ca3(PO4)2
- C. Ca(PO3)2
- D. Ca(H2PO4)2 Discuss
- 5. Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.
Options- A. increased biuret formation
- B. high corrosion rate
- C. increased cost of equipment
- D. all (a), (b) & (c) Discuss
- 6. Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent.
Options- A. 5
- B. 20
- C. 50
- D. 65 Discuss
- 7. Potassic fertilisers do not promote the development of
Options- A. stems & leaves during early stage of plant growth.
- B. starches of potatoes & grains.
- C. sugar of fruits & vegetables.
- D. fibrous materials of plants. Discuss
- 8. Dehydration of ammonium carbamate produces
Options- A. urea
- B. biuret
- C. ammonia water
- D. none of these Discuss
- 9. Scale up problem in design based on the similarity concept takes into account __________ similarity.
Options- A. geometrical
- B. kinematic
- C. dynamic
- D. all (a), (b) and (c) Discuss
- 10. The linear thermal expansion of __________ bricks upto 1000 °C is very low of the order of ? 0.5 percent.
Options- A. fireclay
- B. silica
- C. magnesite
- D. corundum Discuss
More questions
Correct Answer: it is hygroscopic and explosive in nature.
Correct Answer: coal based thermal power plants.
Correct Answer: dilute H2SO4
Correct Answer: CaF2.3Ca3(PO4)2
Correct Answer: all (a), (b) & (c)
Correct Answer: 20
Correct Answer: stems & leaves during early stage of plant growth.
Correct Answer: urea
Correct Answer: all (a), (b) and (c)
Correct Answer: fireclay
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