Heat & Mass Transfer MCQ Questions Answers Mechanical Engineering

Heat & Mass Transfer MCQ Questions Answers – Mechanical Engineering


1) Which of the following material has least thermal conductivity at room temperature ?

a) Human Skin

b) Urethane

c) Wood

d) Brick

View Answer
Option – b)

2)Heat transfer from one place to another takes place through

a) conduction

b) convection

c) radiation

d) all of above

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Option – d)

3) Thermal conductivity of wood depends on

a) moisture

b) density

c) temperature

d) All of these

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Option – d)

4)Overall heat transfer coefficient is associated with
(a) Conduction and radiation
(b) Convection and radiation
(c) Radiation, convection and conduction
(d) None

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Option – d)

5) The unit of thermal diffusivity is

a) m2/hr0C

b) kJ/m2hr

c) m/hr0C

d) m2/hr

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Option – d)

6)Radiation heat flux is
(a) σ A T4
(b) σ A dT
(c) σ T4
(d) None

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Option – c)

7) In which of the following material non-isotropic conductivity is exhibited

a) Lead

b) Wood

c) Copper

d) Brass

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Option – b)

8)Temperature variation in a pipe is

(a) linear

(b) Parabolic

(c) logarithmic

(d) None

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Option – c)

9) Heat transfer by molecular collision in

a) conduction

b) convection

c) radiation

d) scattering

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Option – b)

 

10)The amount of heat required to raise temperature of a substance by …………..

1°C

1°F

10°C

10°F

View Answer
Option – a)