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 2 of 3

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Q11.
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
Q12.
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
Q13.
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
Q14.
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
Q15.
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
Q16.
The temperature drop in a plane wall with uniformly distributed heat generation can be decreased by reducing

a.

Wall thickness

b.

Heat generation rate

c.

Thermal conductivity

d.

Surface area

Discuss
Answer: (a).Wall thickness
Q17.
Consider a slab of thickness ฮด with one side (x = 0) insulated and other side (x = ฮด) maintained at constant temperature. The rate of uniform heat generation within the slab is q g W/m³. Presuming that the heat conduction is in steady state and one dimensional along x direction, the maximum temperature in the slab would occur at x equal

a.

ฮด/2

b.

Zero

c.

ฮด/4

d.

ฮด

Discuss
Answer: (b).Zero
Q18.
There occurs heat conduction and internal heat generation at uniform rate within the conduction medium itself in the following cases
(i) Drying of concrete

(ii) Chemical processes

(iii) Fuel elements in a nuclear reaction

Choose the correct option

a.

1 only

b.

2 only

c.

1 and 3

d.

1, 2 and 3

Discuss
Answer: (d).1, 2 and 3
Q19.
Suppose heat is conducted due to electrons
Where, i = I/A and p is the resistivity, then

a.

q g = 2i² p

b.

q g = 3i² p

c.

q g = i² p

d.

q g = 4i² p

Discuss
Answer: (c).q g = i² p
Q20.
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
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