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

  • When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be


  • Options
  • A. positive
  • B. negative
  • C. zero
  • D. none of these

  • Correct Answer
  • negative 

    • More questions

    • 1. The amplitude is always __________ radius of the circle.

    • Options
    • A. equal to
    • B. less than
    • C. greater than
      • Discuss
    • 2. The spark ignition engines are governed by

    • Options
    • A. hit and miss governing
    • B. qualitative governing
    • C. quantitative governing
    • D. combination of (b) and (c)
      • Discuss
    • 3. Slick is used for repairing and finishing the mould.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 4. The metal patterns as compared to wooden patterns require less

    • Options
    • A. shrinkage allowance
    • B. machining allowance
    • C. draft allowance
    • D. distortion allowance
      • Discuss
    • 5. In iron, the presence of carbon in free form is called graphite.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 6. A pattern is used to make the mould cavity for pouring the molten metal for casting.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 7. A safety valve usually employed with stationary boilers is

    • Options
    • A. lever safety valve
    • B. dead weight safety valve
    • C. high steam and low water safety valve
    • D. all of these
      • Discuss
    • 8. Which of the following statement is correct regarding normal cetaine?

    • Options
    • A. It is a standard fuel used for knock rating of diesel engines.
    • B. Its chemical name is normal-hexadecane.
    • C. It has long carbon chain structure.
    • D. all ofthe above
      • Discuss
    • 9. A molecule consisting of one atom is known as

    • Options
    • A. monoatomic
    • B. diatomic
    • C. triatomic
    • D. polyatomic
      • Discuss
    • 10. The consumable electrode is used in

    • Options
    • A. carbon arc welding
    • B. submerged arc welding
    • C. TIG arc welding
    • D. MIG arc welding
      • Discuss

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