Thermal conductivity of a material may be defined as the________________?

Related Mcqs:

Unit of thermal conductivity in M.K.S. units is ___________________?

A. kcal/kg m2 °C B. kcal-m/hr m2 °C C. kcal/hr m2 °C D. kcal-m/hr °C E. kcal-m/m2 °C...

Metals are good conductors of heat because________________?

A. their atoms collide frequently B. their atoms-are relatively far apart C. they contain free electrons D. they have high density E. all of the above...

Film coefficient is defined as Inside diameter of tube________________?

A. Equivalent thickness of film B. Thermal conductivity Equivalent thickness of film Specific heat x Viscocity C. Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity D. Film coefficient x Inside diameter Thermalconductivity E. none of the above...

A steam pipe is to be insulated by two insulating materials put over each other . For best results__________________?

A. better insulation should be put over pipe and better one over it B. inferior insulation should be put over pipe and better one over it C. both may be put in any order D. whether to put inferior OIL over pipe or the better one would depend on steam temperature E. unpredictable...

The thermal diffusivities for gases are generally_____________________?

A. more than those for liquids B. less than those for liquids C. more than those for solids D. dependent on the viscosity E. same as for the liquids...