Heat Transfer MCQs with answers Page - 4

Here, you will find a collection of MCQ questions on Heat Transfer. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

Admin • 802.91K Points
Coach

Q. In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid

  • (A) Is inversely proportional to the resistance across which the drop occurs
  • (B) And the wall are proportional to individual resistances
  • (C) And the wall is not related
  • (D) None of these

A

Admin • 802.91K Points
Coach

Q. Three material A, B and C of equal thick-nes and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of __________ °C.

  • (A) 40
  • (B) 50
  • (C) 70
  • (D) 95

A

Admin • 802.91K Points
Coach

Q. The main function of baffles provided in a shell and tube heat exchanger is to

  • (A) Facilitate the cleaning of outer tube surface
  • (B) Enhance turbulence
  • (C) Hold the tubes in position
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. The maximum heat transfer co-efficient from steam heating will be attained when the steam is

  • (A) Supersaturated
  • (B) Saturated
  • (C) Wet
  • (D) None of these

A

Admin • 802.91K Points
Coach

Q. The rate of emission of radiation by a body does not depend upon the

  • (A) Wavelength of radiation
  • (B) Surface temperature of the body
  • (C) Nature of the surface
  • (D) Shape and porosity of the body

A

Admin • 802.91K Points
Coach

Q. In a multiple effect evaporator, the effect of boiling point elevation is to

  • (A) Reduce the capacity
  • (B) Reduce the economy
  • (C) Increase the economy
  • (D) None of these

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Admin • 802.91K Points
Coach

Q. Which of the following is concerned with both heat and mass transfer?

  • (A) Kutateladze number
  • (B) Froude number
  • (C) Lewis relationship
  • (D) Nusselt number

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Admin • 802.91K Points
Coach

Q. Pick out the wrong statement.

  • (A) Superheated steam is preferably not used for process heating because of its low heat transfer film co-efficient
  • (B) S.I. unit of fouling factor is Watt/m2.°K
  • (C) In a shell and tube heat exchanger, the shell pressure drop is maximum for orifice baffles
  • (D) Longitudinal fins are used in extended surface heat exchangers, when the direction of fluid flow is parallel to the axis of the tube

A

Admin • 802.91K Points
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Q. The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is __________ compared to the same size pipes without fins.

  • (A) More
  • (B) Less
  • (C) Same
  • (D) Unpredictable

A

Admin • 802.91K Points
Coach

Q. Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is

  • (A) Vertical heat exchanger with steam on tube side
  • (B) Vertical heat exchanger with steam on shell side
  • (C) Horizontal heat exchanger with steam on tube side
  • (D) Horizontal heat exchanger with steam on shell side

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