Transient Heat MCQs

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

Transient Heat MCQs | Page 3 of 8

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Q21.
Which is true regarding lumped system analysis?
(i) Conductive resistance = 0

(ii) Convective resistance = 0

(iii) Thermal conductivity = 0

(iv) Thermal conductivity = infinity

Identify the correct statements
Discuss
Answer: (c).1 and 4
Discuss
Answer: (a).Heating or cooling of fine thermocouple wire due to change in ambient temperature
Q23.
What is the criterion for the applicability of lump system analysis?
Discuss
Answer: (c).Characteristics length
Q24.
What is the value of characteristics length for cylinder?
Discuss
Answer: (d).R/2
Q25.
During heat treatment, cylindrical pieces of 25 mm diameter, 30 mm height and at 30 degree Celsius are placed in a furnace at 750 degree Celsius with convective coefficient 80 W/m² degree. Find the value of biot number if thermal conductivity is 40 W/m degree
Discuss
Answer: (a).0.0082
Q26.
What is the value of characteristics length for sphere?
Discuss
Answer: (b).R/3
Q27.
What is the value of characteristics length for cube?
Discuss
Answer: (d).L/6
Q28.
β€œAn infinite solid is one which extends itself infinitely in all directions of space”. Identify the correct option
Discuss
Answer: (a).True
Q29.
The boundary conditions in case of transient heat conduction in infinite thick solids are

(i) t (x = 0) = t i
(ii) t (0, T) = t a for T greater than zero
(iii) t (infinity, T) = t i for T greater than zero
Identify the correct statements
Discuss
Answer: (d).1, 2 and 3
Q30.
A thermocouple junction of spherical form is to be used to measure the temperature of the gas stream. The junction is at 20 degree Celsius and is placed in a gas stream which is at 200 degree Celsius. Make calculations for junction diameter needed for the thermocouple to have thermal time constant of one second. Assume the thermos-physical properties as given below
k = 20 W/ m K
h = 350 W/m² K
c = 0.4 k J/kg K
p = 8000 kg/m³
Discuss
Answer: (c).0.656 mm
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