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- Question
The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is
Options- A. natural draft cooling tower
- B. induced draft cooling tower
- C. spray chamber
- D. none of these
- Correct Answer
- spray chamber
- 1. __________ determination is not a very significant and important test for gasoline.
Options- A. Gum & sulphur content
- B. Viscosity
- C. Octane number
- D. Reid vapor pressure Discuss
- 2. Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes
Options- A. paralysis of muscles & loss of appetite.
- B. nervous depression.
- C. gastritis & diarrhea.
- D. all (a), (b) and (c). Discuss
- 3. Flow rate of sludge is not measured by a/an
Options- A. orificemeter
- B. open weir
- C. kennison nozzle
- D. both(b)&(c) Discuss
- 4. In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes
Options- A. are easier to clean.
- B. are less prone to fouling.
- C. can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less.
- D. none of these. Discuss
- 5. According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.
Options- A. No component is concentrated at the surface of the solution.
- B. The component molecules are non polar and are of almost equal size.
- C. In the formation of solution, chemical combination/molecular association between unlike molecules takes place.
- D. The attractive forces between like and unlike molecules are almost equal. Discuss
- 6. A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is
Options- A. 13728 J
- B. 19206 J
- C. 4576 J
- D. 12712 J Discuss
- 7. In case of 1.5" heat exchanger tubes, the inside flow area __________ with decrease in BWG.
Options- A. increases
- B. decreases
- C. remains same
- D. none of these Discuss
- 8. 'Heavy water' is termed as 'heavy' because it is
Options- A. denser than water.
- B. an oxide of deuterium.
- C. a heavy liquid.
- D. an oxide of heavier isotope of oxygen. Discuss
- 9. The chemical nature of an element is independent of
Options- A. its atomic number.
- B. the number of protons or electrons present in it.
- C. the number of neutrons present in it.
- D. none of these. Discuss
- 10. Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is
Options- A. more
- B. same
- C. less
- D. twice Discuss
More questions
Correct Answer: Viscosity
Correct Answer: all (a), (b) and (c).
Correct Answer: both(b)&(c)
Correct Answer: can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less.
Correct Answer: In the formation of solution, chemical combination/molecular association between unlike molecules takes place.
Correct Answer: 19206 J
Correct Answer: decreases
Correct Answer: an oxide of deuterium.
Correct Answer: the number of neutrons present in it.
Correct Answer: less
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