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- Question
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
Options- A. neutralised by alkali treatment.
- B. left as such without any treatment.
- C. diluted with fresh water to reduce its acidity.
- D. none of these.
- Correct Answer
- neutralised by alkali treatment.
- 1. Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
Options- A. finned tube heat exchanger with air inside and steam outside.
- B. finned tube heat exchanger with air outside and steam inside.
- C. shell and tube heat exchanger with air inside tubes and steam on shell side.
- D. shell and tube heat exchanger with air on shell side and steam inside tubes. Discuss
- 2. Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas.
Options- A. no change
- B. doubling
- C. l/4th reduction
- D. four fold increase Discuss
- 3. The common pollutant generated in chlor-alkali industry and battery manufacture is
Options- A. mercury
- B. brine
- C. phosphate
- D. none of these Discuss
- 4. Kopp's rule is useful for the determination of
Options- A. molal heat capacities of gases.
- B. heat capacities of solids.
- C. activation energy.
- D. heat capacities of gases. Discuss
- 5. No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules
Options- A. collide without loss of energy.
- B. do work equal to loss in kinetic energy.
- C. are above the inversion temperature.
- D. exert no attractive force on each other. Discuss
- 6. Pick out the wrong unit conversion of temperature.
Options- A. °R = 273 + °F
- B. temperature difference of 1°K = 1°C =
°F - C. °C = (F- 32) x 0.555
- D. °F = (°C + 17.778) x 1.8 Discuss
- 7. Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about __________ kcal/hr.m2.°C.
Options- A. 1250
- B. 2500
- C. 7500
- D. 15000 Discuss
- 8. A bypass stream in a chemical process is useful, because it
Options- A. facilitates better control of the process.
- B. improves the conversion.
- C. increases the yield of products.
- D. none of these. Discuss
- 9. __________ shapedroof is the most commonly used roof for cylinderical storage tanks.
Options- A. Conical
- B. Flat
- C. Dome
- D. Umbrella Discuss
- 10. Industrial workers working in leather tanning & manufacturing units are prone to suffer from
Options- A. respirtory ailments (e.g. bronchitis).
- B. skin diseases (e.g. dermatities).
- C. silicosis.
- D. blurred vision. Discuss
More questions
Correct Answer: finned tube heat exchanger with air outside and steam inside.
Correct Answer: doubling
Correct Answer: mercury
Correct Answer: heat capacities of solids.
Correct Answer: are above the inversion temperature.
Correct Answer: °R = 273 + °F
Correct Answer: 7500
Correct Answer: facilitates better control of the process.
Correct Answer: Conical
Correct Answer: skin diseases (e.g. dermatities).
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