Heat & Mass Transfer MCQ Questions Answers – Mechanical Engineering
Heat and mass transfer are fundamental processes in various engineering disciplines that involve the movement of energy and matter from one place to another. Understanding these processes is crucial for designing efficient systems and solving real-world engineering problems. In this article, we will explore a series of multiple-choice questions (MCQs) related to heat and mass transfer, along with their answers and explanations.
1) Which of the following material has least thermal conductivity at room temperature ?
a) Human Skin
b) Urethane
c) Wood
d) Brick
2)Heat transfer from one place to another takes place through
a) conduction
b) convection
c) radiation
d) all of above
3) Thermal conductivity of wood depends on
a) moisture
b) density
c) temperature
d) All of these
4)Overall heat transfer coefficient is associated with
(a) Conduction and radiation
(b) Convection and radiation
(c) Radiation, convection and conduction
(d) None
5) The unit of thermal diffusivity is
a) m2/hr0C
b) kJ/m2hr
c) m/hr0C
d) m2/hr
6)Radiation heat flux is
(a) σ A T4
(b) σ A dT
(c) σ T4
(d) None
7) In which of the following material non-isotropic conductivity is exhibited
a) Lead
b) Wood
c) Copper
d) Brass
8)Temperature variation in a pipe is
(a) linear
(b) Parabolic
(c) logarithmic
(d) None
9) Heat transfer by molecular collision in
a) conduction
b) convection
c) radiation
d) scattering
10)The amount of heat required to raise temperature of a substance by …………..
1°C
1°F
10°C
10°F