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Test: Heat Transfer By Natural Convection - 2


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8 Questions MCQ Test Topicwise Question Bank for Mechanical Engineering | Test: Heat Transfer By Natural Convection - 2

Test: Heat Transfer By Natural Convection - 2 for Chemical Engineering 2022 is part of Topicwise Question Bank for Mechanical Engineering preparation. The Test: Heat Transfer By Natural Convection - 2 questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Heat Transfer By Natural Convection - 2 MCQs are made for Chemical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Heat Transfer By Natural Convection - 2 below.
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Test: Heat Transfer By Natural Convection - 2 - Question 1

The convective heat transfer coefficient from a hot cylindrical surface exposed to still air varies in accordance with 
Where ΔT is the temperature difference between the hot surface and surrounding ambient air.

Detailed Solution for Test: Heat Transfer By Natural Convection - 2 - Question 1

Test: Heat Transfer By Natural Convection - 2 - Question 2

The nusselt number of convective heat transfer between a horizontal tube and water surrounding it is prescribed by the relation Nu = 0.52 (Gr Pr)0.25 for a 5 cm diameter tube, the heat transfer coefficient is 6000 W/m2-K. Subsequently, the tube is replaced by one with 20 cm diameter tube. If the temperature and surface of the fluid remain same, the heat transfer coefficient will change to

Detailed Solution for Test: Heat Transfer By Natural Convection - 2 - Question 2


∴ 
∴ 
= 4242W/m2-K

Test: Heat Transfer By Natural Convection - 2 - Question 3

In convection heat transfer one of the significant dimensionless number is

Test: Heat Transfer By Natural Convection - 2 - Question 4

Nusselt number in case of free convection is the function of

Detailed Solution for Test: Heat Transfer By Natural Convection - 2 - Question 4

For free convection
Nu = f(Gr, Pr)
Rayleigh number = Gr x Pr.

Test: Heat Transfer By Natural Convection - 2 - Question 5

When there is flow of fluid over a flat plate of length L the average heat transfer coefficient is given by (Nux = Local nusselt number)

Detailed Solution for Test: Heat Transfer By Natural Convection - 2 - Question 5

Test: Heat Transfer By Natural Convection - 2 - Question 6

The Grashoff number is

Test: Heat Transfer By Natural Convection - 2 - Question 7

The temperature profile for heat transfer from one fluid to another separated by a solid wall is

Test: Heat Transfer By Natural Convection - 2 - Question 8

Match List-I with List-II and select the correct 

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