Discussion
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- Question
A composite slab has two layers of different materials with thermal conductivities k1 and k2. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be
Options- A. k1 k2
- B. k1 + k2
- C.
- D.
- Correct Answer
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- 1. The injection pressure in a diesel engine is about
Options- A. 10 bar
- B. 100 bar
- C. 150 bar
- D. 500 bar Discuss
- 2. The discharge is __________ at critical pressure.
Options- A. zero
- B. minimum
- C. maximum Discuss
- 3. The heating and expanding of a gas is called thermodynamic system.
Options- A. Yes
- B. No Discuss
- 4. The workdone in a free expansion process is zero.
Options- A. True
- B. False Discuss
- 5. The rivets are used for __________ fastenings.
Options- A. permanent
- B. temporary Discuss
- 6. The limit of eccentricity is based upon no tension condition.
Options- A. True
- B. False Discuss
- 7. A file with 50 - 60 teeth in 25 mm is called bastard file.
Options- A. True
- B. False Discuss
- 8. Blast furnace is used to produce
Options- A. pig iron
- B. cast iron
- C. wrought iron
- D. steel Discuss
- 9. In welding aluminium with TIG arc welding, alternating current is used.
Options- A. Correct
- B. Incorrect Discuss
- 10. German silver contains
Options- A. 1% silver
- B. 2% silver
- C. 5% silver
- D. no silver Discuss
More questions
Correct Answer: 100 bar
Correct Answer: maximum
Correct Answer: No
Correct Answer: True
Correct Answer: permanent
Correct Answer: True
Correct Answer: False
Correct Answer: pig iron
Correct Answer: Correct
Correct Answer: no silver
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