Conduction With Heat Generation MCQs

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

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Conduction With Heat Generation MCQs | Page 3 of 3

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Q21.
The temperature distribution profile for a solid cylinder is

a.

Parabolic

b.

Linear

c.

Ellipse

d.

Hyperbolic

Discuss
Answer: (a).Parabolic
Q22.
A slab of 12 cm thickness and generating heat uniformly at 10⁶ W/m³ has thermal conductivity of 200 W/m degree. Both surfaces of the slab are maintained at 150 degree Celsius. Determine the heat flow rate at the quarter planes

a.

30000 W/m²

b.

40000 W/m²

c.

50000 W/m²

d.

60000 W/m²

Discuss
Answer: (a).30000 W/m²
Q23.
Consider a convective heat flow to water at 75 degree Celsius from a cylindrical nuclear reactor fuel rod of 50 mm diameter. The rate of heat generation is 50000000 W/m³ and convective heat transfer coefficient is I kW/m² K. The outer surface temperature of the fuel element would be

a.

625 degree Celsius

b.

700 degree Celsius

c.

550 degree Celsius

d.

400 degree Celsius

Discuss
Answer: (b).700 degree Celsius
Q24.
For a cylindrical rod with uniformly distributed heat sources, the thermal gradient at half the radius location will be

a.

Four times

b.

Twice

c.

One fourth

d.

One half

Discuss
Answer: (d).One half
Q25.
Consider heat conduction through a solid sphere of radius R. There are certain assumptions

(i) Unsteady state conditions
(ii) One-dimensional radial conduction
(iii) Constant thermal conductivity

Identify the correct statements

a.

i and iii

b.

ii and iii

c.

i, ii and iii

d.

i and ii

Discuss
Answer: (b).ii and iii
Q26.
An 8 cm diameter orange, approximately spherical in shape, undergoes ripening process and generates 18000 k J/m³ hr of energy. If external surface of the orange is at 6.5 degree Celsius, find out the temperature at the center of the orange. Take thermal conductivity = 0.8 k J/ m hr degree for the orange material

a.

13.5 degree Celsius

b.

12.5 degree Celsius

c.

11.5 degree Celsius

d.

10.5 degree Celsius

Discuss
Answer: (b).12.5 degree Celsius
Q27.
A solid sphere of 8 cm radius has a uniform heat generation of 4000000 W/m³. The outside surface is exposed to a fluid at 150 degree Celsius with convective heat transfer coefficient of 750 W/m² K. If thermal conductivity of the solid material is 30 W/m K, determine maximum temperature

a.

444.45 degree Celsius

b.

434.45 degree Celsius

c.

424.45 degree Celsius

d.

414.45 degree Celsius

Discuss
Answer: (b).434.45 degree Celsius
Q28.
Identify the correct boundary condition for a hollow sphere with inside surface insulated.

a.

At r = r 1, the conduction region is perfectly insulated

b.

At r = r 1, the conduction region is partially insulated

c.

Heat flow is infinity

d.

Heat flow is negative

Discuss
Answer: (a).At r = r 1, the conduction region is perfectly insulated
Q29.
A hollow sphere (k = 30 W/m K) of inner radius 6 cm and outside radius 8 cm has a heat generation rate of 4000000 W/m³. The inside surface is insulated and heat is removed by convection over the outside surface by a fluid at 100 degree Celsius with surface conductance 300 W/m² K. Make calculations for the temperature at the outside surfaces of the sphere

a.

105.6 degree Celsius

b.

205.6 degree Celsius

c.

305.6 degree Celsius

d.

405.6 degree Celsius

Discuss
Answer: (c).305.6 degree Celsius
Q30.
A composite slab consists of 5 cm thick layer of steel (k = 146 kJ/m hr degree) on the left side and a 6 cm thick layer of brass (k = 276 kJ/m hr degree) on the right hand side. The outer surfaces of the steel and brass are maintained at 100 degree Celsius and 50 degree Celsius. The contact between the two slabs is perfect and heat is generated at the rate of 4.2 * 10⁵ k J/m² hr at the plane of contact. The heat thus generated is dissipated from both sides of composite slab for steady state conditions. Calculate the temperature at the interface

a.

115.26 degree celsius

b.

125.26 degree celsius

c.

135.26 degree celsius

d.

145.26 degree celsius

Discuss
Answer: (b).125.26 degree celsius
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