Heat Radiation MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Radiation, a fundamental topic in the field of Heat Transfer. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Heat Radiation MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Heat Radiation mcq questions that explore various aspects of Heat Radiation problems. Each MCQ is crafted to challenge your understanding of Heat Radiation principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Heat Transfer tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Heat Radiation MCQs are your pathway to success in mastering this essential Heat Transfer topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Heat Radiation. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Heat Radiation knowledge to the test? Let's get started with our carefully curated MCQs!

Heat Radiation MCQs | Page 5 of 21

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Q41.
β€œSpatial distribution is also known as directional distribution”. Choose the correct option
Discuss
Answer: (a).True
Q42.
Thermal radiation strikes a surface which has a reflectivity of 0.55 and transmissivity of 0.032. A quantity known as flux is found out to be 95 W/m². Determine the rate of incident flux.
Discuss
Answer: (d).227.27 W/m²
Discuss
Answer: (a).3.9 * 10¯¹ to 7.8 * 10¯¹ micron meter
Q44.
Radiant energy with an intensity of 800 W/m² strikes a flat plate normally. The absorptivity is thrice the reflectivity and twice the transmissivity. Determine the rate of absorption
Discuss
Answer: (c).436.40 W/m²
Q45.
A thin metal plate of 4 cm diameter is suspended in atmospheric air whose temperature is 290 K. This plate attains a temperature of 295 K when one of its face receives radiant energy from a heat source at the rate of 2 W. If heat transfer coefficient on both surfaces of the plate is stated to be 87.5 W/m² K, workout the reflectivity of the plate
Discuss
Answer: (b).0.45
Q46.
On clear night there is radiation from earth’s surface to the space. On such a night, the water particles on the plant leaves radiate to the sky whose temperature may be taken as 200 K. The water particles receive heat by convection from the surrounding air, the convection heat transfer coefficient has a value of 30 W/m² K. If the water should not freeze, make calculations for the air temperature
Discuss
Answer: (a).280.474 K
Q47.
β€œIsothermal furnaces, with small apertures, approximate a black body and are frequently used to calibrate heat flux gauges”. Chose the correct answer
Discuss
Answer: (a).True
Q48.
β€œA surface element emits radiation in all directions, the intensity of radiation is however same in different directions. Choose the correct answer
Discuss
Answer: (b).False
Q49.
The energy emitted by a black surface should not vary in accordance with
Discuss
Answer: (d).Time
Q50.
Likewise the amount of emitted radiation is strongly influenced by the wavelength even if temperature of the body is
Discuss
Answer: (a).Constant