Discussion
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- Question
Which of the following is not used as a binder in coal briquetting?
Options- A. Tar
- B. Molasses
- C. Pitch
- D. Line
- Correct Answer
- Line
- 1. During Joule-Thomson expansion of gases
Options- A. enthalpy remains constant.
- B. entropy remains constant.
- C. temperature remains constant.
- D. none of these. Discuss
- 2. Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.
Options- A. isothermal
- B. adiabatic
- C. isentropic
- D. none of these Discuss
- 3. Out of the following refrigeration cycles, which one has maximum COP?
Options- A. Air cycle
- B. Carnot cycle
- C. Ordinary vapor compression cycle
- D. Vapor compression with a reversible expansion engine Discuss
- 4. No work is done by the system, when a reaction occurs at constant
Options- A. volume
- B. temperature
- C. pressure
- D. none of these Discuss
- 5. Measurement of thermodynamic property of temperature is facilitated by __________ law of thermodynamics.
Options- A. 1st
- B. zeroth
- C. 3rd
- D. none of these Discuss
- 6. Gross & net calorific value is the same for
Options- A. blast furnace gas
- B. coke oven gas
- C. L.D. converter gas
- D. none of these Discuss
- 7. Stack heat losses can be minimised by
Options- A. controlling the excess air.
- B. oxygen enrichment of combustion air.
- C. using low c.v. fuels.
- D. maintaining proper draft in the furnace. Discuss
- 8. Adiabatic flame temperature of a fuel is dependent on the initial temperature of
Options- A. fuel
- B. air
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 9. Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.
Options- A. <120
- B. >120
- C. <90
- D. 90-110 Discuss
- 10. In high temperature carbonisation of coal compared to low temperature carbonisation
Options- A. yield of ammonia is less.
- B. aromatic content of tar is low.
- C. H2 content in the coke oven gas is more.
- D. calorific value of the coke oven gas is lower. Discuss
Fuels and Combustion problems
Search Results
Correct Answer: enthalpy remains constant.
Correct Answer: isothermal
Correct Answer: Carnot cycle
Correct Answer: volume
Correct Answer: zeroth
Correct Answer: L.D. converter gas
Correct Answer: controlling the excess air.
Correct Answer: both (a) & (b)
Correct Answer: >120
Correct Answer: H2 content in the coke oven gas is more.
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