Discussion
Home ‣ Mechanical Engineering ‣ Thermodynamics Comments
- Question
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
Options- A. cracking
- B. carbonisation
- C. fractional distillation
- D. full distillation
- Correct Answer
- fractional distillation
- 1. The specific heat of water is
Options- A. 1.817
- B. 2512
- C. 4.187
- D. none of these Discuss
- 2. The absolute zero temperature is taken as
Options- A. -273°C
- B. 273°C
- C. 237°F
- D. -237°F Discuss
- 3. Which of the following gas is mostly used in town for street and domestic lighting and heating?
Options- A. Producer gas
- B. Coal gas
- C. Mond gas
- D. Coke oven gas Discuss
- 4. The value of gas constant (R) in S. I. units is
Options- A. 0.287 J/kgK
- B. 2.87 J/kgK
- C. 28.7 J/kgK
- D. 287 J/kgK Discuss
- 5. Water gas is obtained by passing air and a large amount of steam over waste coal at about 650°C.
Options- A. Correct
- B. Incorrect Discuss
- 6. Which of the following statement is incorrect?
Options- A. The liquid fuels consist of hydrocarbons.
- B. The liquid fuels have higher calorific value than solid fuels.
- C. The solid fuels have higher calorific value than liquid fuels.
- D. A good fuel should have low ignition point. Discuss
- 7. Which of the following is correct?
Options- A. Absolute pressure = Gauge pressure + Atmospheric pressure
- B. Gauge pressure = Absolute pressure + Atmospheric pressure
- C. Atmospheric pressure = Absolute pressure + Gauge pressure
- D. Absolute pressure = Gauge pressure - Atmospheric pressure Discuss
- 8. Workdone in a free expansion process is
Options- A. zero
- B. minimum
- C. maximum
- D. positive Discuss
- 9. The constant pressure, constant volume and constant pvn processes are regarded as irreversible process.
Options- A. True
- B. False Discuss
- 10. When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.
Options- A. atomisation
- B. carbonisation Discuss
Thermodynamics problems
Search Results
Correct Answer: 4.187
Correct Answer: -273°C
Correct Answer: Coal gas
Correct Answer: 287 J/kgK
Correct Answer: Incorrect
Correct Answer: The solid fuels have higher calorific value than liquid fuels.
Correct Answer: Absolute pressure = Gauge pressure + Atmospheric pressure
Correct Answer: zero
Correct Answer: True
Correct Answer: carbonisation
Comments
There are no comments.More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.