QUESTION 1:Select the material that will assist the best in conducting heat from point A topoint B:1.1)A) Aluminium alloyB) BronzeC) QuartzD) Iron1.2)Which of the following options will maximze thermal contact resistance:A) Applying a thermally conducting liquid on the surfaces before they arepressed against each otherB) By inserting a soft metallic foil such as tin, silver, copper, nickel, oraluminum between the two surfacesC) All of the aboveD) None of the above1.3)True/False: Effectiveness of a single fin is the ratio of the total heat transferfrom the finned surface to the heat transfer from the same surface if therewere no fins.1.4) True/False: The heat flux in a circular tube with laminar forced convectionwill be higher near the inlet of the tube and gradually decreases to the fullydeveloped value.1.5)Fill in the blanks: A body whose surface properties are independent ofwavelength is said to be aone for all wavelengths, the emissivity of aThe emissivity of aisis between zero andone.1.6) Fill in the blanks: The thermal resistance of the tube in a heat exchanger isand theusually negligible when the wall thickness of the tube isthermal conductivity of the tube material is1.7) True/False: The heat transfer in a heat exchanger will reach its maximumvalue when the cold fluid is heated to the inlet temperature of the hot fluid.Therefore, the temperature of the cold fluid cannot rise above the inlettemperature of the hot fluid at any location in a heat exchanger.

It is required to choose correct option

1.1) Select the material that will assist the best in conducting heat from point A to point B: A) Aluminium alloy B) Bronze C) Quartz D) Iron 1.2) Which of the following options will maximze thermal contact resistance: A) Applying a thermally conducting liquid on the surfaces before they are pressed against each other B) By inserting a soft metallic foil such as tin, silver, copper, nickel, or aluminum between the two surfaces C) All of the above D) None of the above 1.3) True/False: Effectiveness of a single fin is the ratio of the total heat transfer from the finned surface to the heat transfer from the same surface if there were no fins.

1.1) Select the material that will assist the best in conducting heat from point A to point B: A) Aluminium alloy B) Bronze C) Quartz D) Iron 1.2) Which of the following options will maximze thermal contact resistance: A) Applying a thermally conducting liquid on the surfaces before they are pressed against each other B) By inserting a soft metallic foil such as tin, silver, copper, nickel, or aluminum between the two surfaces C) All of the above D) None of the above 1.3) True/False: Effectiveness of a single fin is the ratio of the total heat transfer from the finned surface to the heat transfer from the same surface if there were no fins.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter42: Heat Gains And Heat Losses In Structures

Section: Chapter Questions

Problem 12RQ

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