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Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning See What Others Are Saying!
  • Question

  • The boiling point of R-12 is about - 30°C.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • More questions

    • 1. A good fuel should have __________ ignition point.

    • Options
    • A. high
    • B. low
      • Discuss
    • 2. The kinetic energy of molecules of a gas becomes zero at absolute zero temperature.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 3. The rear teeth of a broach

    • Options
    • A. perform burnishing operation
    • B. remove minimum metal
    • C. remove maximum metal
    • D. remove no metal
      • Discuss
    • 4. The compressor capacity is defined as the

    • Options
    • A. actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
    • B. volume of air delivered by the compressor
    • C. volume of air sucked by the compressor during its suction stroke
    • D. none of the above
      • Discuss
    • 5. The limit of eccentricity for no tensile conditions for a column of circular section of diameter (d) is

    • Options
    • A. d/4
    • B. d/8
    • C. d/12
    • D. d/16
      • Discuss
    • 6. The bending stress in abeam is __________ bending moment.

    • Options
    • A. equal to
    • B. less than
    • C. more than
    • D. directly proportional to
      • Discuss
    • 7. In petrol engines, advancing of the spark timing will __________ the knocking tendency.

    • Options
    • A. not effect
    • B. decrease
    • C. increase
      • Discuss
    • 8. The petrol engines are also known as __________ engines.

    • Options
    • A. compression ignition
    • B. spark ignition
      • Discuss
    • 9. The operation of reproduction of an outline of a template on a workpiece is called face milling.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 10. The moment of inertia of a solid cone of mass m and base radius r about its vertical axis is

    • Options
    • A. 3mr2/5
    • B. 3mr2/10
    • C. 2mr2/5
    • D. 4mr2/5
      • Discuss

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