Heat Transfer Basics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Transfer Basics, a fundamental topic in the field of Basic Chemical Engineering. 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 Basics 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 Basics mcq questions that explore various aspects of Heat Transfer Basics problems. Each MCQ is crafted to challenge your understanding of Heat Transfer Basics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Heat Transfer Basics MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Heat Transfer Basics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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Heat Transfer Basics MCQs | Page 14 of 53

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Q131.
With increase in temperature, the thermal conductivity of steel

a.

increases

b.

decreases

c.

remains unchanged

d.

increases exponentially

Discuss
Answer: (b).decreases
Q132.
Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids ?

a.

Dittus-Boeltier equation

b.

Sieder-Tate equation

c.

Nusselt equation

d.

None of these

Discuss
Answer: (b).Sieder-Tate equation
Q133.
The main function of baffles provided in a shell and tube heat exchanger is to

a.

facilitate the cleaning of outer tube surface.

b.

enhance turbulence.

c.

hold the tubes in position.

d.

all 'a', 'b' & 'c'.

Discuss
Answer: (b).enhance turbulence.
Q134.
'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a

a.

non-dimensional factor.

b.

factor of safety.

c.

conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient.

d.

none of these.

Discuss
Answer: (b).factor of safety.
Q135.
A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter 'd'. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to

a.

d^(0.8)

b.

d^(-0.2)

c.

d⁻¹

d.

d^(-1.8)

Discuss
Answer: (b).d^(-0.2)
Q136.
Prandtl and Reynolds analogy are same, when Prandtl number is

a.

0.5

b.

1

c.

> 2

d.

1.5

Discuss
Answer: (b).1
Q137.
Heat transfer occurs by natural convection because change in temperature causes difference in

a.

viscosity

b.

density

c.

thermal conductivity

d.

heat capacity

Discuss
Answer: (b).density
Q138.
The ratio of kinematic viscosity to thermal diffusivity is called the __________ number.

a.

Peclet

b.

Prandtl

c.

Stanton

d.

Nusselt

Discuss
Answer: (b).Prandtl
Q139.
Baffles are provided in heat exchangers to increase the

a.

fouling factor

b.

heat transfer area

c.

heat transfer co-efficient

d.

heat transfer rate

Discuss
Answer: (c).heat transfer co-efficient
Q140.
200 kg of solids (on dry basis) is subjected to a drying process for a period of 5000 seconds. The drying occurs in the constant rate period with the drying rate as, Nc = 0.5 x 10⁻³ kg/m².s. The initial moisture content of the solid is 0.2 kg moisture/kg dry solid. The interfacial area available for drying is 4 m²/1000 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid)

a.

0.5

b.

0.05

c.

0.1

d.

0.15

Discuss
Answer: (c).0.1
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