Heat and Mass Transfer
Sensible heat is the heat required to

Change vapour into liquid
Change liquid into vapour
Convert water into steam and superheat it
Increase the temperature of a liquid of vapour

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Film coefficient is defined as the ratio of

Thickness of film of fluid to the thermal conductivity
Thickness of film of fluid to the temperature drop through the films of fluids
Thermal conductivity to the equivalent thickness of the film of fluid
Temperature drop through the films of fluids to the thickness of film of fluids

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer,

One could place either insulation on either side
One should take into account the steam temperature before deciding as to which insulation is put where
The better insulation must be put inside
The better insulation must be put outside

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Thermal conductivity of a material may be defined as the

Heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces
All of these
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
Quantity of heat flowing in one second through one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Heat and Mass Transfer