Thermal diffusivity of a substance is __________________?

Related Mcqs:

Thermal conductivity of solid metals with rise in temperature normally___________________?

A. increases B. decreases C. remains constant D. may increase or decrease depending on temperature E. unpredictable...

The time constant of a thermocouple is_______________?

A. the time taken to attain the final temperature to be measured B. the time taken to attain 50% of the value of initial temperature difference C. the time taken to attain 63.2% of the value of initial temperature difference D. determined by the time taken to reach 100°C from 0°C E. none of the … The time constant of a thermocouple is_______________?Read More...

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...

Log mean temperature difference in case of counter flow compared to parallel flow will be________________?

A. same B. more C. less D. depends on other factors E. none of the above...

Depending on the radiating properties, a body will be white when_________________?

A. p = 0, x = 0 and a = 1 B. p=l,T = 0anda = 0 C. p = 0, x = 1 and a = 0 D. x = 0, a + p = 1 E. a = 0, x + p = 1. where a = absorptivity, p = reflectivity, x = … Depending on the radiating properties, a body will be white when_________________?Read More...