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- Question
Pick out the wrong statement.
Options- A. The controlling resistance in case of heating of air by condensing steam is in the air film.
- B. The log mean temperature difference (LMTD) for counter flow and parallel flow can be theoretically same when any one of the fluids (hot or cold fluid) passes through the heat exchanger at constant temperature.
- C. In case of a 1 - 2 shell and tube heat exchanger, the LMTD correction factor value increases sharply, when a temperature cross occurs.
- D. Phase change in case of a pure fluid at a given pressure from liquid to vapor or vice-versa occurs at saturation temperature.
- Correct Answer
- In case of a 1 - 2 shell and tube heat exchanger, the LMTD correction factor value increases sharply, when a temperature cross occurs.
- 1. Pick out the correct statement.
Options- A. Deforestation helps in controlling the green house effect.
- B. Global warming is detrimental for increase in food productivity and may cause flood and cyclone.
- C. Lightening discharges are natural source of production of SO2 & H2S pollutant.
- D. Sulhur dioxide causes death by asphyxiation. Discuss
- 2. __________ atmosphere is maintained inside an iron blast furnace.
Options- A. Oxidising
- B. Reducing
- C. Inert
- D. Decarburising Discuss
- 3. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfies
Options- A. 0 < Xw < 0.5
- B. Xw = 0.5
- C. 0.5 < Xw < 1.0
- D. Xw = 1.0 Discuss
- 4. Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.
Options- A. polyurathane
- B. polysulphone
- C. polycarbonate
- D. polyester Discuss
- 5. The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.
Options- A. 1.2
- B. 12
- C. 120
- D. 700 Discuss
- 6. Buna-S is also called
Options- A. polyurathane
- B. SBR
- C. teflon
- D. bakelite Discuss
- 7. Dead zone in an instrument must be less than __________ percent of the scale.
Options- A. 0.2
- B. 1.5
- C. 4
- D. 8 Discuss
- 8. Fireclay bricks are used in the
Options- A. furnaces allowed to cool frequently
- B. flues
- C. chimney linings
- D. all (a), (b) and (c) Discuss
- 9. Aniline point of high speed diesel may be about __________ °C.
Options- A. 35
- B. 70
- C. 105
- D. 150 Discuss
- 10. Ebonite is a/an
Options- A. highly vulcanised rubber.
- B. natural rubber.
- C. unvulcanised raw rubber.
- D. adhesive. Discuss
More questions
Correct Answer: Global warming is detrimental for increase in food productivity and may cause flood and cyclone.
Correct Answer: Reducing
Correct Answer: 0.5 < Xw < 1.0
Correct Answer: polycarbonate
Correct Answer: 120
Correct Answer: SBR
Correct Answer: 0.2
Correct Answer: all (a), (b) and (c)
Correct Answer: 70
Correct Answer: highly vulcanised rubber.
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