Discussion
Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning See What Others Are Saying!
- Question
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about
Options- A. 1
- B. 1.25
- C. 2.15
- D. 5.12
- Correct Answer
- 1.25
- 1. The ability of a material to absorb energy in the plastic range is called
Options- A. resilience
- B. creep
- C. fatigue strength
- D. toughness Discuss
- 2. Structural sections such as rails, angles, I-beams are made by
Options- A. hot rolling
- B. hot drawing
- C. hot piercing
- D. hot extrusion Discuss
- 3. The absolute pressure is equal to
Options- A. gauge pressure + atmospheric pressure
- B. gauge pressure - atmospheric pressure
- C. atmospheric pressure - gauge pressure
- D. gauge pressure - vacuum pressure Discuss
- 4. A compound steam engine requires a heavier flywheel than simple steam engines.
Options- A. True
- B. False Discuss
- 5. The discharge through a nozzle is maximum for a certain value of exit pressure. This pressure is known as critical pressure.
Options- A. Agree
- B. Disagree Discuss
- 6. The mechanical advantage of a lifting machine is the ratio of
Options- A. distance moved by effort to the distance moved by load
- B. load lifted to the effort applied
- C. output to the input
- D. all of the above Discuss
- 7. The advantage of the fuel injection system over the carburetor system is
Options- A. improved fuel efficiency
- B. improved emission
- C. improved power output
- D. all of these Discuss
- 8. A maintenance free battery
Options- A. has lead-antimony plate grid
- B. has lead-calcium plate grid
- C. does not contain acid
- D. does not contain water Discuss
- 9. Drilling is an example of
Options- A. orthogonal cutting
- B. oblique cutting
- C. simple cutting
- D. uniform cutting Discuss
- 10. Reactors for propulsion applications are designed for
Options- A. any form of uranium
- B. natura uranium
- C. enriched uranium
- D. plutonium Discuss
More questions
Correct Answer: resilience
Correct Answer: hot rolling
Correct Answer: gauge pressure + atmospheric pressure
Correct Answer: False
Correct Answer: Agree
Correct Answer: load lifted to the effort applied
Correct Answer: all of these
Correct Answer: has lead-calcium plate grid
Correct Answer: oblique cutting
Correct Answer: enriched uranium
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