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

  • The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as


  • Options
  • A. Wien's law
  • B. Stefan's law
  • C. Kirchhoff's law
  • D. Planck's law

  • Correct Answer
  • Kirchhoff's law 

    • More questions

    • 1. The specific weight is also known as weight density.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 2. Which of the following material has maximum malleability?

    • Options
    • A. Lead
    • B. Soft steel
    • C. Wrought iron
    • D. Copper
      • Discuss
    • 3. A petrol that detonates easily is called

    • Options
    • A. high octane petrol
    • B. low octane petrol
    • C. unleaded petrol
    • D. blended fuel
      • Discuss
    • 4. A tool used to withdraw a drill from the sleeve is called

    • Options
    • A. drill remover
    • B. drill puller
    • C. drift
    • D. drill drawer
      • Discuss
    • 5. The length of hacksaw blade is the distance between the outside edges of the holes which fits over the pins.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 6. Euler's formula holds good only for

    • Options
    • A. short columns
    • B. long columns
    • C. both short and long columns
    • D. weak columns
      • Discuss
    • 7. Surface plate is used to check the trueness of flat surfaces.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. Follow-up prescribes the sequence of operations to be followed.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 9. An over-inflated tyre will wear the tread most near the

    • Options
    • A. edges
    • B. corners
    • C. centre
    • D. none of these
      • Discuss
    • 10. A beam encastered at both the ends is called

    • Options
    • A. simply supported beam
    • B. fixed beam
    • C. cantilever beam
    • D. continuous beam
      • Discuss

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