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Test: Modes of Heat Transfer


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10 Questions MCQ Test Heat Transfer | Test: Modes of Heat Transfer

Test: Modes of Heat Transfer for Chemical Engineering 2022 is part of Heat Transfer preparation. The Test: Modes of Heat Transfer questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Modes of Heat Transfer MCQs are made for Chemical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Modes of Heat Transfer below.
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Test: Modes of Heat Transfer - Question 1

The literature of heat transfer generally recognizes distinct modes of heat transfer. How many modes are there?

Detailed Solution for Test: Modes of Heat Transfer - Question 1

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

Test: Modes of Heat Transfer - Question 2

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 for Test: Modes of Heat Transfer - Question 2

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

Test: Modes of Heat Transfer - Question 3

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 for Test: Modes of Heat Transfer - Question 3

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

Test: Modes of Heat Transfer - Question 4

Unit of rate of heat transfer is

Detailed Solution for Test: Modes of Heat Transfer - 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

Convective heat transfer coefficient doesn’t depend on

Detailed Solution for Test: Modes of Heat Transfer - 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

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 for Test: Modes of Heat Transfer - Question 6

It is directly proportional to all of above except time.

Test: Modes of Heat Transfer - Question 7

How many types of convection process are there?

Detailed Solution for Test: Modes of Heat Transfer - Question 7

Forced, natural and mixed convection.

Test: Modes of Heat Transfer - Question 8

Thermal conductivity is maximum for which substance

Detailed Solution for Test: Modes of Heat Transfer - Question 8

Thermal conductivity of diamond is 2300 W/m K.

Test: Modes of Heat Transfer - Question 9

A radiator in a domestic heating system operates at a surface temperature of 60 degree Celsius. Calculate the heat flux at the surface of the radiator if it behaves as a black body

Detailed Solution for Test: Modes of Heat Transfer - Question 9

As, q = Q/A

= 5.67 * 10-8 (273+60)4 = 697.2.

Test: Modes of Heat Transfer - Question 10

Which of the following is an example of forced convection?

Detailed Solution for Test: Modes of Heat Transfer - Question 10

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

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