A grey body is one whose absorptivity does not vary with temperature a – McqOptions

MCQOPTIONS

1.	A grey body is one whose absorptivity does not vary with temperature and wave length of the incident ray.
A.	True
B.	False
Answer» B. False

Discussion

No Comment Found

Related MCQs

A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in higher coefficient of performance.
The expression is used for calculating
The critical thickness of insulation for a sphere is
Planck's law holds good for all coloured bodies.
The condition of refrigerant after passing through the condenser in a vapour compression system is
The difference between dry bulb temperature and dew point temperature, is called
Logarithmic mean temperature difference is the same as the arithmetic mean temperature difference.
If the condenser temperature is kept constant, the coefficient of performance of a refrigeration cycle increases with the increase in evaporator temperature.
When α is absorptivity, ρ is reflectivity and τ is transmittivity, then for a diathermanous body,
When there is an addition of water vapour to the air of enclosed space, a gain in __________ is said to occur.