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Test: Solar Radiations


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10 Questions MCQ Test Heat Transfer | Test: Solar Radiations

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

The heat energy absorbed by a known area in a fixed time is determined with the help of an instrument called

Detailed Solution for Test: Solar Radiations - Question 1

The effects of absorption by the atmosphere are eliminated by finding the value of the solar constant at various altitudes of the sun on the same day.

Test: Solar Radiations - Question 2

The observed solar constant S0, the true solar constant S and the angular elevation Z of the sun are related by the expression

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From the straight line graph between log S0 along y-axis and sec Z along x-axis, the intercept log S on the y-axis is found.

Test: Solar Radiations - Question 3

The value of solar constant varies between

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When the sun lies at a mean distance from the earth, the heat flux from the sun to the outer edge of the atmosphere has been found to be 1350 W/m2.

Test: Solar Radiations - Question 4

The total amount of heat energy received by the sphere of radius r is

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Area of sphere is 4 π R2.

Test: Solar Radiations - Question 5

Amount of heat energy radiated by unit surface of the sun in the same time workout as Take, R = mean distance of earth from the sun and r = radius of sun

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It is the ratio of 4 π R2 S to 4 π R2.

Test: Solar Radiations - Question 6

Temperature of sun can be workout from

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(Wavelength) MAX T = 2-89 * 10 -3 m K.

Test: Solar Radiations - Question 7

The temperature of the photosphere, referred to as the effective temperature of the sun, is usually taken as

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The sun consists of a central hot portion surrounded by the photosphere.

Test: Solar Radiations - Question 8

The approximate distribution of the flow of sun’s energy to the earth’s surface is

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33% is reflected back to space, 15% is absorbed in the atmosphere and 43% is transmitted to the earth.

Test: Solar Radiations - Question 9

The solar radiation that is felt at the earth’s surface includes
(i) Direct radiation that has passed through the atmosphere
(ii) Diffuse radiation from the sky
(iii) Absorbed radiation from the water
Identify the correct statement

Detailed Solution for Test: Solar Radiations - Question 9

Option (iii) must be reflected radiation from water.

Test: Solar Radiations - Question 10

When the sun lies at a mean distance from the earth, the heat flux from the sun to the outer edge of the atmosphere has been found to be

Detailed Solution for Test: Solar Radiations - Question 10

47% of this would reach the earth’s surface.

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