Heat and Mass Transfer
Heat flows from one body to other when they have

Different specific heat
Different temperatures
Different heat contents
Different atomic structure

ANSWER DOWNLOAD EXAMIANS APP

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

All of these
Heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces
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