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Mechanical Engineering Exam  >  Mechanical Engineering Test  >  Heat Transfer  >  Test: Modes of Heat Transfer - Mechanical Engineering MCQ

Modes of Heat Transfer - GATE ME Free MCQ Test with solutions


MCQ Practice Test & Solutions: Test: Modes of Heat Transfer (10 Questions)

You can prepare effectively for Mechanical Engineering Heat Transfer with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Modes of Heat Transfer". These 10 questions have been designed by the experts with the latest curriculum of Mechanical Engineering 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 20 minutes
  • - Number of Questions: 10

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Test: Modes of Heat Transfer - Question 1
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The literature of heat transfer generally recognizes distinct modes of heat transfer. How many modes are there?

Detailed Solution: Question 1

There are three modes of heat transfer i.e. radiation, convection and conduction.

Test: Modes of Heat Transfer - Question 2
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Consider system A at uniform temperature t and system B at another uniform temperature T (t > T). Let the two systems be brought into contact and be thermally insulated from their surroundings but not from each other. Energy will flow from system A to system B because of

Detailed Solution: Question 2

Greater the temperature imbalance the higher would be the rate of energy transfer.

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Test: Modes of Heat Transfer - Question 3
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An oil cooler in a high performance engine has an outside surface area 0.12 m2 and a surface temperature of 65 degree Celsius. At any intermediate time air moves over the surface of the cooler at a temperature of 30 degree Celsius and gives rise to a surface coefficient equal to 45.4 W/ m 2 K. Find out the heat transfer rate?

Detailed Solution: Question 3

: Q = (T2 – T1) A h = 0.12 (65-30) 45.4 = 190.68 W.

Test: Modes of Heat Transfer - Question 4
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Unit of rate of heat transfer is

Detailed Solution: Question 4

Unit of heat transfer is Joule but rate of heat transfer is joule per second i.e. watt.

Test: Modes of Heat Transfer - Question 5
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Convective heat transfer coefficient doesn’t depend on

Detailed Solution: Question 5

It is denoted by h and is dependent on space, time, geometry, orientation of solid surface.

Test: Modes of Heat Transfer - Question 6
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The rate equation used to describe the mechanism of convection is called Newton’s law of cooling. So rate of heat flow by convection doesn’t depend on

Detailed Solution: Question 6

It is directly proportional to all of above except time.

Test: Modes of Heat Transfer - Question 7
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How many types of convection process are there?

Detailed Solution: Question 7

Forced, natural and mixed convection.

Test: Modes of Heat Transfer - Question 8
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Thermal conductivity is maximum for which substance

Detailed Solution: Question 8

Thermal conductivity of diamond is 2300 W/m K.

Test: Modes of Heat Transfer - Question 9
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A radiator in a domestic heating system operates at a surface temperature of 60 °C. Calculate the heat flux at the surface of the radiator if it behaves as a black body.

Detailed Solution: Question 9

Answer: A

The heat flux for a black body is given by the Stefan-Boltzmann law, q = σT4, where σ = 5.67 × 10-8 W m-2 K-4.

Convert the surface temperature to kelvin: T = 60 °C = 60 + 273.15 = 333.15 K.

Compute the fourth power: T4 ≈ (333.15)4 ≈ 1.2318 × 1010 K4.

Now calculate the heat flux: q = 5.67 × 10-8 × 1.2318 × 1010 ≈ 698 W m-2.

Rounded to the values given in the options, q ≈ 697.2 W m-2, so option A is the correct choice.

Test: Modes of Heat Transfer - Question 10
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Which of the following is an example of forced convection?

Detailed Solution: Question 10

In forced convection the flow of fluid is caused by a pump, fan or by atmospheric winds.

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About this Mechanical Engineering Practice Test

This test contains 10 MCQs on Modes of Heat Transfer with detailed solutions for each question. It is part of the Heat Transfer course on EduRev, designed to align with the current Mechanical Engineering syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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