Heat Transfer MCQs with answers Page - 85

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.

To check the correct answer, simply click the View Answer button provided for each question.

Have your own questions to contribute? Click the button below to share your MCQs with others!

+ Add Question

A

Admin • 802.91K Points
Coach

Q. Thermal diffusivity is

  • (A) A function of temperature
  • (B) A mathematical formula only
  • (C) A dimensionless parameter
  • (D) A physical property of the material

A

Admin • 802.91K Points
Coach

Q. In a thermal power plant, cooling towers are used to cool

  • (A) steam
  • (B) condensed wate
  • (C) circulating
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. A steam pipe is to be insulated by two insulating materials put over each other. For best results

  • (A) Better matt. Over pipe and inferior over it
  • (B) Inferior matt. Over pipe and better over it
  • (C) Can be in any order
  • (D) None of the above

A

Admin • 802.91K Points
Coach

Q. The rate of heat flow from a 50 mm thick wall of material having thermal conductivity of 40 W/m?C for a temperature difference of 10?C will be

  • (A) 800 W/m2 - hr
  • (B) 200 W/m2 - hr
  • (C) 2000 W/m2 - hr
  • (D) 8000 W/m2 - hr

A

Admin • 802.91K Points
Coach

Q. All temperatures above the freezing point of gold are usually determined by

  • (A) Thermo couple
  • (B) Gas thermometer
  • (C) Optical pyrometer
  • (D) Resistance bridge

A

Admin • 802.91K Points
Coach

Q. Two large closely spaced concentric spheres (both of which are perfect black body radiators) are maintained at temperatures of 127?C and 27?C respectively. The space in between the two spheres is evacuated. Taking Stefan Boltzmann constant as 5.67 x 108 watt m2K the rate of radiation in watts per sq. m between the two spheres is approximately

  • (A) 992
  • (B) 762
  • (C) 37,500 kg
  • (D) 852

A

Admin • 802.91K Points
Coach

Q. A body cools from 90?C to 80?C in 5 minutes. Under the same external conditions to cool from 80?C to 70?C the body will take

  • (A) 2.5 minutes
  • (B) Cannot be predicted
  • (C) 5 minutes
  • (D) More than 5 minutes

A

Admin • 802.91K Points
Coach

Q. Maximum heat transfer rate can be expected in case of

  • (A) Turbulent flow
  • (B) Co-current flow
  • (C) Laminar flow
  • (D) Counter current flow

A

Admin • 802.91K Points
Coach

Q. Which of the following material has highest value of thermal diffusivity?

  • (A) Steel
  • (B) Concrete
  • (C) Lead
  • (D) Mineral wool

A

Admin • 802.91K Points
Coach

Q. The quantity of heat required to change the temperature of 1 gm of ice from -6?C to -5?C is known as

  • (A) Freezing heat
  • (B) Cold heat
  • (C) Latent heat of freezing
  • (D) Specific heat

Add MCQ in this Category

If you want to share an MCQ question in this category, it's a great idea! It will be helpful for many other students using this website.

Share Your MCQ

Browse Categories

Click on category to learn MCQs of that category.