Heat Transfer Basics Mcqs

This set of Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ Heat Transfer ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Chemical Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Heat Transfer comprehensively.

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1.
Select the only wrong statement.

Heat can be converted into work

Heat can be reflected by a mirror

Heat waves cannot pass through vacuum

Heat is a form of energy

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3.
When heats is transferred by a chain of molecules from the hot area of an object to a colder area the process of heat transfer is called

Natural convection

Forced convection

Conduction

Radiation

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4.
Heat transfer by conduction is described to

Fouriers law

Newtons law of cooling

Stefan Boltzmann law

Ficks law

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5.
Heat transfer by conduction is directly proportional to

(thermal potential difference)/(thermal resistance)

(thermal resistance)/(thermal potential difference)

(thermal potential difference)(thermal resistance)

Thermal resistance

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6.
Whenever there is a temperature difference

Heat will be transferred from hotter object to colder object

Heat will be transferred from colder object to hotter object

Heat will not be transferred

None of these answers

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8.
The thermal conductivity of a gas

Decreases with increasing temperature

Increases with increasing temperature

Is independent of temperature and pressure

Is greater than the thermal conductivity of water at the same temperature

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9.
The thermal conductivity of water

Remains unaffected with change in temperature

Decreases with increase in temperature upto about 300?F

Increases with increase in temperature upto about 300?F

Is less than the thermal conductivity of air at the same temperature

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10.
If ks kl and kg are the thermal conductivities of aluminium water and air at the same temperature then

Ks > kl > kg

Kg > kl > ks

Ks > kg > kl

Kl > ks > kg

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13.
Heat transfer by conduction depends upon

Temperature difference and thermal conductivity only

Temperature difference and area only

Temperature difference and thickness only

Temperature difference thermal conductivity area and thickness

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14.
Which one of the four factors would cause heat transfer rate by conduction to decrease if the value of that factor were increased?

Temperature difference

Thermal conductivity

Area

Thickness

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15.
A sphere a cube and a thin circular plate all made of the same material and having the same mass are initially heated to a temperature 300?C. Which of these objects will cool slowest when left in air at room temperature ?

Sphere

Cube

Circular plate

All will cool at the same rate

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