The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by__________________?

Related Mcqs:

With increase in temperature, the total emissivity of conductors____________________?

A. Increases B. Decreases C. Remain same D. Decreases linearly...

When warm and cold liquids are mixed, the heat transfer is mainly by_______________?

A. Conduction B. Convection C. Radiation D. Both A. & C....

Multipass heat exchangers are used______________________?

A. Because of simplicity of fabrication B. For low heat load C. To obtain higher heat transfer co-efficient and shorter tube D. To reduce the pressure drop...

Prandtl number is the reciprocal of____________________?

A. Thermal diffusivity/Momentum diffusivity B. Thermal diffusivity × Momentum C. Thermal diffusivity × Mass diffusivity D. Mass diffusivity × Momentum diffusivity...

In a 1-1 concurrent heat exchanger, if the tube side fluid outlet temperature is equal to the shell side fluid outlet temperature, then the LMTD is_________________?

A. ∞ B. 0 C. Equal to the difference between hot and cold fluids inlet temperature D. Equal to the difference between hot fluid inlet temperature and cold fluid outlet temperature...