Heat Transfer Questions


Q.  Heat conducted througfi unit area and unit thick face per unit time when temperature difference between opposite faces is unity,is called__________________?

a. thermal resistance
b. thermal coefficient
c. temperature gradient
d. thermal conductivity
e. heat-transfer


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  According to Stefan-Boltzmann law, ideal radiators emit radiant energy at a rate proportional to___________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Log mean temperature difference in case of counter flow compared to parallel flow will be________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  The unit of Stefan Boltzmann constant is ____________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Stefan Boltzmann law is applicable for heat transfer by __________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Thermal diffusivity of a substance is __________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  The thermal diffusivities for gases are generally_____________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  A grey body is one whose absorptivity _________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Planck’s law holds good for________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  A perfect black body is one which_______________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of___________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  In regenerator type heat exchanger, heat transfer takes place by___________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by ___________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Depending on the radiating properties, body will be transparent when________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Absorptivity of a body will be equal to its emissivity___________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  The amount of radiation mainly depends on___________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  The ratio of the energy absorbed by the body to total energy falling on it is called_________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  The emissive power of a body depends upon its___________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is____________________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit_______________?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Depending on the radiating properties, a body will be black when_________________?
Category: Mechanical Engineering Questions,   Published by: teswesm