MCQ Questions Mechanical Engineering Heat Transfer

Take a look at these MCQ Questions Heat Transfer for engineering interview questions and our tips on how to answer them. If you’re applying for an engineering internship, graduate scheme or entry-level job, you’ll face at least one interview as part of an engineering employer’s recruitment process. You may be interviewed by one or more members of the HR team, senior members of the engineering team you’d be joining or a mixture of both. In this section we will study MCQ Questions Mechanical Engineering Heat Transfer.

As well as questions about your reasons for applying to the role and the employer in question, engineering recruiters will be assessing your potential in the areas that is crucial to any engineering role: technical expertise. Engineers may be asked to perform feats of fantastic technical prowess, but it will be as as part of a Justice League rather than as a solo engineering super hero.

The interviewer is almost as nervous as the candidate in most interviews. You might wonder if you look confident enough, if you will hire the right person, or if you are asking the right engineering interview questions. The last question is arguably the most crucial part to worry about when you’re interviewing candidates.

MCQ Questions Mechanical Engineering Heat Transfer - Set - 3

Question 1:

Unit of thermal diffusivity is
(a) m²/hr
(b) m²/hr°C
(c) kcal/m² hr
(d) kcal/m.hr°C

Check Answer

Correct Answer – (A)

Question 2 :

Thermal diffusivity is
(a) a dimensionless parameter
(b) function of temperature
(c) used as mathematical model
(d) a physical property of the material

Check Answer

Correct Answer – (D)

Question 3 :

The ratio of heat flow Q1/Q2 from two walls of same thickness having their thermal conductivities as ATj – 2K2 will be
(a) I
(b) 0.5
(c) 2
(d) 0.25

Check Answer

Correct Answer – (C)

Question 4 :

Heat is transferred by all three modes of transfer, viz, conduction, convection and radiation in
(a) electric heater
(b) steam condenser
(c) melting of ice
(d) boiler.

Check Answer

Correct Answer – (D)

Question 5 :

Which of the following has maximum value of thermal conductivity
(a) aluminium
(b) steel
(c) brass
(d) copper

Check Answer

Correct Answer – (A)

MCQ Questions Mechanical Engineering Heat Transfer

Question 6:

Thermal diffusivity of a substance is .
(a) proportional of thermal conductivity
(b) inversely proportional to k
(c) proportional to (k)
(d) inversely proportional to k2

Check Answer

Correct Answer – (D)

Question 7:

Heat transfer by radiation mainly depends upon
(a) its temperature
(b) nature of the body
(c) kind and extent of its surface
(d) all of the above

Check Answer

Correct Answer – (D)

Question 8:

According to Prevost theory of heat exchange
(a) it is impossible to transfer heat from low temperature source to t high temperature source
(b) heat transfer by radiation requires no medium
(c) all bodies above absolute zero emit radiation
(d) heat transfer in most of the cases takes place by combination of conduction, convection and radiation

Check Answer

Correct Answer – (C)

Question 9:

Moisture would find its way into insulation by vapour pressure unless it is prevented by
(a) high thickness of insulation
(b) high vapour pressure
(c) less thermal conductivity insulator
(d) a vapour seal

Check Answer

Correct Answer – (D)

Question 10:

Thermal conductivity of a material may be defined as the
(a) quantity of heat flowing in one second through one cm cube of material when opposite faces ^re maintained at a temperature difference of 1°C
(b) quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C
(c) heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces
(d) all of the above

Check Answer

Correct Answer – (D)

MCQ Questions Mechanical Engineering Heat Transfer

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