Heat Transfer MCQs with answers Page - 90

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Q. Which method can be used for heating wood?

  • (A) Flame heating
  • (B) Resistance heating
  • (C) Dielectric heating
  • (D) Radiation heating

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Q. A correction of LMTD is necessary in case of

  • (A) Parallel flow heat exchanger
  • (B) Counter current heat exchanger
  • (C) Cross flow heat exchanger
  • (D) All of the above

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Q. The dimensions of thermal conductivity are

  • (A) MLT-3 ?-1
  • (B) MLT?3
  • (C) ML-1T2 ?
  • (D) MLT2 ?2

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Q. In which of the following heat exchange process, the value of overall heat transfer coefficient will be highest?

  • (A) Air to carbondioxide
  • (B) Air to heavy tars
  • (C) 37,500 kg
  • (D) Steam condensers

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Q. A thin circulr disc has a concentric hole in it. On heating the diameter of hole will

  • (A) decrease
  • (B) remain constant
  • (C) 37,500 kg
  • (D) increase

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