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Test: Heat Transfer By Forced Convection - 2


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

Test: Heat Transfer By Forced Convection - 2 for Chemical Engineering 2022 is part of Topicwise Question Bank for Mechanical Engineering preparation. The Test: Heat Transfer By Forced Convection - 2 questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Heat Transfer By Forced 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 Forced Convection - 2 below.
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Test: Heat Transfer By Forced Convection - 2 - Question 1

The non-dimensional parameter known as Stanton number (St) is used in

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

Nusselt number in case of forced convection is the function of

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

For forced convection
Nu - f(Re, Pr)

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

For laminar flow in a tube for constant heat flux condition Nusselt number is approximately equal to

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

For laminar flow in a tube for constant wall temperature Nusselt number is approximately equal to

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

If Nusselt number is 400, Stanton number is 0.5 and Reynold’s number is 40, then Prandtl number will be

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

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

The velocity and temperature distribution in a pipe flow are given by U(r) and T(r). If um is the mean velocity at any section of the pipe, the mean temperature at that section is

Detailed Solution for Test: Heat Transfer By Forced Convection - 2 - Question 6

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

A fluid flowing over aflat plate has the following properties:
Dynamic viscosity = 25 x 10-6 kg/ms
Specific heat = 2 kJ/kgK
Thermal conductivity = 0.05 W/mK

The hydrodynamic boundary layer thickness found to be 0.5 mm. The thickness of thermal boundary layer would be

Detailed Solution for Test: Heat Transfer By Forced Convection - 2 - Question 7



Hence 

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

For a laminar flow of air (Pr = 0.71) over a flat plate at zero incidence, the thickness of the velocity boundary layer δ and the hydrodynamic boundary layer δt are such that

Detailed Solution for Test: Heat Transfer By Forced Convection - 2 - Question 8


Since, 

Test: Heat Transfer By Forced Convection - 2 - Question 9

Heat is lost from a 100 mm diameter steam pipe placed horizontally in ambient at 30°C. If the Nusseit number is 25 and thermal conductivity of air is 0.03 W/mK then the heat transfer coefficient will be

Detailed Solution for Test: Heat Transfer By Forced Convection - 2 - Question 9


or  

Test: Heat Transfer By Forced Convection - 2 - Question 10

Heat transfer coefficients for free convection in gases, forced convection in gases and vapours and for boiling water lie respectively in the range of

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