Heat Transfer From Extended Surfaces MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Transfer From Extended Surfaces, 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 Transfer From Extended Surfaces 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 Transfer From Extended Surfaces mcq questions that explore various aspects of Heat Transfer From Extended Surfaces problems. Each MCQ is crafted to challenge your understanding of Heat Transfer From Extended Surfaces 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 Transfer From Extended Surfaces MCQs are your pathway to success in mastering this essential Heat Transfer topic.

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Heat Transfer From Extended Surfaces MCQs | Page 5 of 8

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Q41.
Consider the following statements pertaining to heat transfer through fins

(i) They must be arranged at right angles to the direction of flow of working fluid

(ii) The temperature along the fin is variable and accordingly heat transfer rate varies along the fin elements

(iii) Fins are equally effective irrespective whether they are on the hot side or cold side of the fluid

(iv) Fins are made of materials that have thermal conductivity higher than that of wall

Identify the correct statements
Discuss
Answer: (d).1 and 2
Q42.
An increase in fin effectiveness is caused by high value of

(i) Convective coefficient

(ii) Thermal conductivity

(iii) Circumference

(iv) Area

Identify the correct statement
Discuss
Answer: (c).2 and 4
Discuss
Answer: (c).Fin effectiveness = A FIN/A B (Efficiency of fin)
Q44.
The handle of a saucepan, 30 cm long and 2 cm in diameter, is subjected to 100 degree Celsius temperature during a certain cooking operation. The average unit surface conductance over the handle surface is 7.35 W/m² degree in the kitchen air at 24 degree Celsius. The cook is likely to grasp the last 10 cm of the handle and hence the temperature in this region should not exceed 38 degree Celsius. What should be the thermal conductivity of the handle material to accomplish it? The handle may be treated as a fin insulated at the tip
Discuss
Answer: (b).17.36 W/m degree
Q45.
Let us assume a square section fin split longitudinally and used as two fins. This will result in
Discuss
Answer: (d).Increase in heat transfer
Discuss
Answer: (b).Fin effectiveness is improved if fin is made from a material of low conductivity
Q47.
The convective coefficient in boilers and condenser is
Discuss
Answer: (b).High
Q48.
In thermometer heat is dissipated from which end?
Discuss
Answer: (a).Back side
Discuss
Answer: (c).Finite length
Q50.
Thermometric well apparatus doesn’t consists of
Discuss
Answer: (d).Ammeter
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