Test: Steady & Unsteady Heat Transfer - Mechanical Engineering MCQ

Steady- f (y, z), Unsteady- f (y

Steady- f (x, t), Unsteady- f (x)

Steady- f (x, y, t), Unsteady- f (x)

Steady- f (x), Unsteady- f (x, t)

There is a variation in temperature in the course of time

Heat exchange is constant

It is a function of space and time coordinates

Internal energy of the system changes

Boilers and turbines

Cooling of I.C engine

Chilling effect of cold wind on a warm body

Electric bulb cools down by the surrounding atmosphere

Axial only

Unpredictable

Radial only

No heat transfer takes place

Newton’s law of cooling

Second law of thermodynamics

Newton’s second law of motion

First law of thermodynamics

Radiation

Conduction

Convection

Conduction as well as convection

Newton’s first law

Wein’s displacement law

Kirchhoff’s law

Newton’s law of cooling

The process of heat transfer is an irreversible process

For heat exchange, a temperature gradient must exist

A material medium is not necessary for heat transmission

Heat flow doesn’t depends on temperature

Conduction from the fire

If it is near the fire, convection sounds good

Convection and radiation together

Radiation will provide quick warmth

Through the walls of the refrigerator

During annealing of castings

Through the walls of the furnace

Through lagged pipe carrying steam