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- Question
Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?
Options- A. Smog & ozone
- B. Hydrogen fluoride & nitrogen oxides
- C. Sulphur dioxide & spray of weed killers
- D. Carbon monoxide
- Correct Answer
- Carbon monoxide
- 1. Dew point of a gas-vapour mixture
Options- A. increases with temperature rise.
- B. decreases with temperature rise.
- C. decreases with decrease in pressure.
- D. increases with increase in pressure. Discuss
- 2. 'Six-tenth factor' rule is used for estimating the
Options- A. equipment installation cost.
- B. equipment cost by scaling.
- C. cost of piping.
- D. utilities cost. Discuss
- 3. The payback method for the measurement of return on investment
Options- A. gives a correct picture of profitability.
- B. underemphasises liquidity.
- C. does not measure the discounted rate of return.
- D. takes into account the cash inflows after the recovery of investments. Discuss
- 4. In a manufacturing industry, break even point occurs, when the
Options- A. total annual rate of production equals the assigned value.
- B. total annual product cost equals the total annual sales.
- C. annual profit equals the expected value.
- D. annual sales equals the fixed cost. Discuss
- 5. Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the
Options- A. density separation.
- B. differential wettability.
- C. size.
- D. volatile matter content. Discuss
- 6. Buna-S is a __________ material.
Options- A. fibrous
- B. plastic
- C. resinous
- D. rubbery Discuss
- 7. Compressibility factor for almost all the gases are approximately same at the same
Options- A. pressure and temperature.
- B. reduced pressure and reduced temperature.
- C. critical pressure and critical temperature.
- D. none of these. Discuss
- 8. In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.
Options- A. 1.3 to 2
- B. 1.6 to 2
- C. 2.5
- D. 1.5 to 3 Discuss
- 9. Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to
Options- A. Reynold stresses
- B. shear forces
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 10. Paddle agitator
Options- A. is suitable for mixing low viscosity liquids.
- B. produces axial flow.
- C. moves at very high speed.
- D. none of these. Discuss
More questions
Correct Answer: decreases with decrease in pressure.
Correct Answer: equipment cost by scaling.
Correct Answer: does not measure the discounted rate of return.
Correct Answer: total annual product cost equals the total annual sales.
Correct Answer: density separation.
Correct Answer: rubbery
Correct Answer: reduced pressure and reduced temperature.
Correct Answer: 1.3 to 2
Correct Answer: both (a) & (b)
Correct Answer: is suitable for mixing low viscosity liquids.
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