GATE ME concept:view-factors PYQs & Answers

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concept:view-factors

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–6 of 6. Imported answers require independent review unless marked reviewed.

Topic practice 6 questionsPage 1 of 1

Consider a cylindrical furnace of 5 m diameter and 5 m length with bottom, top and curved surfaces maintained at uniform temperatures of 800 K, 1500 K and 500 K, respectively. The view factor between the bottom and top surfaces,

is 0.2. The magnitude of net radiation heat transfer rate between the bottom surface and the curved surface is __________ kW (rounded off to 1 decimal place). All surfaces of the furnace can be assumed as black. The Stefan-Boltzmann constant,

Diagram for Mechanical Engineering question 48

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A cylindrical rod of length

and diameter

is placed inside a cubic enclosure of side length

denotes the inner surface of the cube. The view-factor

Your answerChoose one option.

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A solid sphere of radius 10 mm is placed at the centroid of a hollow cubic enclosure of side length 30 mm. The outer surface of the sphere is denoted by 1 and the inner surface of the cube is denoted by 2. The view factor

for radiation heat transfer is ______ (round off to two decimal places).

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Sphere 1 with a diameter of 0.1 m is completely enclosed by another sphere 2 of diameter 0.4 m. The view factor

Your answerChoose one option.

0.0625

0.25

0.5

1.0

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Three sets of parallel plates LM, NR and PQ are given in Figures 1, 2 and 3. The view factor F_ is defined as the fraction of radiation leaving plate I that is intercepted by plate J. Assume that the values of F_ and F_ are 0.8 and 0.4, respectively. The value of F_ (round off to one decimal place) is ______.

Diagram for Mechanical Engineering question 45

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Two black surfaces, AB and BC, of lengths 5 m and 6 m, respectively, are oriented as shown. Both surfaces extend infinitely into the third dimension. Given that view factor

and Stefan Boltzmann constant,

W/(m

), the heat transfer rate from Surface 2 to the surrounding environment is ________ kW.

Diagram for Mechanical Engineering question 37

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GATE ME concept:view-factors PYQs

How to practice concept:view-factors

Question 48

Question 43

Question 44

Question 10

Question 45

Question 37