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- Question
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
Options- A. is economical in operation.
- B. employs high velocity, high heat transfer rate and less heating surface requirement.
- C. employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle.
- D. both (b) & (c).
- Correct Answer
- both (b) & (c).
- 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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