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Mechanical Engineering Exam  >  Mechanical Engineering Test  >  Heat Transfer  >  Test: General Heat Conduction Equation - Mechanical Engineering MCQ

General Heat Conduction Equation - Free MCQ Practice Test with solutions,


MCQ Practice Test & Solutions: Test: General Heat Conduction Equation (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: General Heat Conduction Equation". 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: General Heat Conduction Equation - Question 1
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From the concept of kinetic theory, mean travel velocity of the gas molecules is prescribed by the relation

Where,
G = Universal gas constant
M = Molecular weight of the gas
T = Absolute temperature

Detailed Solution: Question 1

Heat transfer by conduction in gases occurs through transport of the kinetic energy of molecular motion resulting from the random movement and collisions of the molecules.

Test: General Heat Conduction Equation - Question 2
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Low temperature insulation are used when the enclosure is at a temperature lower than the ambient temperature. Which one of the following is not a low temperature insulation?

Detailed Solution: Question 2

Asbestos is a high temperature insulation which are used when it is desired to prevent an enclosure at a temperature higher than the ambient from losing heat to its surroundings.

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Test: General Heat Conduction Equation - Question 3
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The value of Lorenz number in 10-8 W ohms/K2 is

Detailed Solution: Question 3

Lorenz no. = k/α T

Test: General Heat Conduction Equation - Question 4
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For liquids, thermal conductivity is governed by the relation

Where,
CP = Specific heat at constant pressure
M = Molecular weight of the liquid
p = Mass density
A = Area

Detailed Solution: Question 4

Area doesn’t depends on the nature of liquid but on the quantity (Ac p) is nearly constant for all liquids.

Test: General Heat Conduction Equation - Question 5
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Consider the following parameters
(i) Composition
(ii) Density
(iii) Porosity
(iv) Structure
Then, thermal conductivity of glass wool varies from sample to sample because of variation is

Detailed Solution: Question 5

There is a variation due to all above options.

Test: General Heat Conduction Equation - Question 6
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The thermal conductivity and the electrical conductivity of a metal at absolute temperature are related as

Detailed Solution: Question 6

It is defined as the ratio of thermal conductivity to the product of electrical conductivity and temperature.

Test: General Heat Conduction Equation - Question 7
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The relation Ϫ2 t =0 is referred to as

Detailed Solution: Question 7

In the absence of internal heat generation or release of energy within the body, equation reduces to Laplace equation.

Test: General Heat Conduction Equation - Question 8
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The unit of thermal diffusivity is

Detailed Solution: Question 8

The quantity α = k/pc is called thermal diffusivity.

Test: General Heat Conduction Equation - Question 9
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To effect a bond between two metal plates, 2.5 cm and 15 cm thick, heat is uniformly applied through the thinner plate by a radiant heat source. The bonding must be held at 320 K for a short time. When the heat source is adjusted to have a steady value of 43.5 k W/m2, a thermocouple installed on the side of the thinner plate next to source indicates a temperature of 345 K. Calculate the temperature gradient for heat conduction through thinner plate. In the diagram, the upper plate is 2.5 cm thick while the lower is 15 cm thick.

Detailed Solution: Question 9

Temperature gradient = d t/d x = – 1000 degree Celsius/m. Also, q/A = – k (t2– t 1)/δ.

Test: General Heat Conduction Equation - Question 10
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The diffusion equations
Ɏ2t + q g = (1/α) (d t/d r)
Governs the temperature distribution under unsteady heat flow through a homogenous and isotropic material. The Fourier equation follows from this expression when

Detailed Solution: Question 10

In unsteady state condition, there is no internal heat generation.

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About this Mechanical Engineering Practice Test

This test contains 10 MCQs on General Heat Conduction Equation 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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