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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. __________ of depreciation calculation does not take into account the interest on investments.
Options- A. Present worth method
- B. Sinking fund method
- C. Sum of the years-digits method
- D. all (a), (b) and (c) Discuss
- 2. Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
Options- A. coal ash
- B. potassium cyanide
- C. ortho-xylene
- D. none of these Discuss
- 3. Pick out the wrong statement.
Options- A. Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water.
- B. Apatite is the principal material present in phosphate rock which is chemically Ca10 (PO4)6 (F, Cl, OH).
- C. Urea is more hygroscopic than ammonium nitrate.
- D. Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form. Discuss
- 4. The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.
Options- A. rate
- B. pressure
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 5. Main pollutant present in automobile exhaust is
Options- A. CO
- B. CO2
- C. NO
- D. hydrocarbons Discuss
- 6. Out of the following refrigeration cycles, which one has maximum COP?
Options- A. Air cycle
- B. Carnot cycle
- C. Ordinary vapor compression cycle
- D. Vapor compression with a reversible expansion engine Discuss
- 7. 95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ °C.
Options- A. 2
- B. -40
- C. 30
- D. 55 Discuss
- 8. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body.
Options- A. grey
- B. black
- C. opaque
- D. white Discuss
- 9. In a single tank system, the transfer function of level to inlet flow rate is
Options- A. R/TS
- B. R/(TS + 1)
- C. l(TS + l)
- D. 1/TS Discuss
- 10. Nichol's chart deals with
Options- A. A.R. vs. phase lag of first order.
- B. A.R. vs. phase lag of second order.
- C. closed loop values vs. open loop values.
- D. frequency response values of controllers. Discuss
More questions
Correct Answer: Sum of the years-digits method
Correct Answer: potassium cyanide
Correct Answer: Urea is more hygroscopic than ammonium nitrate.
Correct Answer: both (a) & (b)
Correct Answer: CO
Correct Answer: Carnot cycle
Correct Answer: 2
Correct Answer: grey
Correct Answer: R/(TS + 1)
Correct Answer: closed loop values vs. open loop values.
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