Thermal conductivity of glass-wool varies from sample to sample because of variation in
* composition
* density
* porosity
31) Thermal conductivity of glass-wool varies from sample to sample because of variation in
Answer is:
all of the above.
Explanation:
Related Heat transfer MCQ with Answers
Answer is:
all of the above
Explanation:
Thermal conductivity of a material may be defined as the
* quantity of heat flowing in one second through a slab of the material of area 1 cm2 and thickness 1 cm when its faces differ in temperature by 1 Degree Centigrade
* quantity of heat flowing in one second through one cm of material when opposite faces are maintained at a temperature difference of 1 Degree Centigrade
* heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces
Answer is: