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- Question
The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels.
Options- A. 60
- B. 90
- C. 105
- D. 120
- Correct Answer
- 90
- 1. H2S present in gaseous stream can be removed by adsorption on
Options- A. silica gel
- B. active carbon
- C. bog iron
- D. limestone powder Discuss
- 2. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature
Options- A. rate of reaction is very low.
- B. very high pressure is required resulting in costly pressure vessel.
- C. space velocity of gas is very low resulting in decreased conversion.
- D. none of these Discuss
- 3. Water hammer in a pipeline results from the
Options- A. bursting of pipelines due to closure by a valve.
- B. rapid pressure change due to a rapid change in the rate of flow.
- C. pressure increase due to closure of a valve resulting in decrease in rate of flow.
- D. none of these. Discuss
- 4. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the
Options- A. osmotic pressure of the soil water becomes less than that of the plant sap.
- B. soil becomes too alkaline.
- C. osmotic pressure of the soil water becomes higher than that of the plant sap.
- D. soil becomes too acidic. Discuss
- 5. Polycaprolactum is
Options- A. nylon-6
- B. nylon-66
- C. dacron
- D. rayon Discuss
- 6. Iron is not used alone as a catalyst in ammonia synthesis, because
Options- A. its activity declines rapidly, if heated to above 520°C.
- B. it decomposes ammonia.
- C. it gets oxidised above 500°C.
- D. none of these. Discuss
- 7. Which of the following pollutants is absent in the emissions from a fertiliser plant?
Options- A. SO2 & SO3
- B. NO2
- C. NH3
- D. CO Discuss
- 8. Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by
Options- A. adsorption on palladium.
- B. cryogenic operations (low temperature cooling).
- C. absorption (using ethanolamine or pyragalloll solution).
- D. none of these. Discuss
- 9. Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil?
Options- A. Modern theory
- B. Carbide theory
- C. Engler theory
- D. all (a), (b) and (c) Discuss
- 10. The composition of fresh feed to the high temperature, high pressure urea autoclave is
Options- A. excess liquid ammonia and liquefied CO2.
- B. excess liquid ammonia and compressed CO2 gas.
- C. liquid ammonia and excess compressed CO2.
- D. compressed ammonia gas and excess compressed CO2. Discuss
More questions
Correct Answer: bog iron
Correct Answer: rate of reaction is very low.
Correct Answer: rapid pressure change due to a rapid change in the rate of flow.
Correct Answer: osmotic pressure of the soil water becomes higher than that of the plant sap.
Correct Answer: nylon-6
Correct Answer: its activity declines rapidly, if heated to above 520°C.
Correct Answer: CO
Correct Answer: cryogenic operations (low temperature cooling).
Correct Answer: Carbide theory
Correct Answer: excess liquid ammonia and compressed CO2 gas.
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