Convective Heat Transfer MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Convective Heat Transfer, 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 Convective Heat Transfer 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 Convective Heat Transfer mcq questions that explore various aspects of Convective Heat Transfer problems. Each MCQ is crafted to challenge your understanding of Convective Heat Transfer 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 Convective Heat Transfer 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 Convective Heat Transfer. 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 Convective Heat Transfer knowledge to the test? Let's get started with our carefully curated MCQs!

Convective Heat Transfer MCQs | Page 5 of 7

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Q41.
For laminar flow, Prandtl number must be more than
Discuss
Answer: (c).0.6
Q42.
Air at atmospheric pressure and 20 degree Celsius flows with 6 m/s velocity through main trunck duct of air conditioning system. The duct is rectangular in cross-section and measures 40 cm by 80 cm. Determine heat loss per meter length of duct corresponding to unit temperature difference. The relevant thermos-physical properties of air are
v = 15 * 10¯โถ m²/s

ฮฑ = 7.7 * 10¯² m²/hr

k = 0.026 W/m degree
Discuss
Answer: (b).42.768 W
Q43.
The local film coefficient for laminar flow past a flat plate may be obtained from the correlation
Discuss
Answer: (a).Nu = 0.332 (Re)^0.5 (Pr)^0.33
Q44.
For a plate of length l, an average value of Nusselt number is given by
Discuss
Answer: (d).Nu = 0.664 (Re)^0.5 (Pr)^0.33
Q45.
The correlation for liquid metal is given by
Discuss
Answer: (b).Nu = 0.565 (Re) (Pr)
Q46.
Which of the following is true for turbulent flow?
Discuss
Answer: (b).GrPr > 10โน
Discuss
Answer: (a).Nu = 0.023 (Re)^0.8 (Pr)^0.4
Q48.
Investigate the effect of following condition on the average value of heat transfer coefficient in flow through a tube

Two fold increases in flow velocity by varying mass flow rate

It may be presumed that there is no change in the temperature of the liquid and the tube wall, and that the flow through the tube is turbulent in character
Discuss
Answer: (d).74.1% increases
Q49.
Calculate the rate of heat loss from a human body which may be considered as a vertical cylinder 30 cm in diameter, and 175 cm high while standing in a 30 km/hr wind at 15 degree Celsius. Human has a surface temperature of 35 degree Celsius
Discuss
Answer: (b).688.86 W
Q50.
A heat treat steel plate measures 3 m by 1 m and is initially at 30 degree Celsius. It is cooled by blowing air parallel to 1 m edge at 9 km/hr. If the air is at 10 degree Celsius. Estimate the convection heat transfer from both sides of the plate
Discuss
Answer: (d).747.6 W
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