The absorptivity of a grey body at a given temperature __________ with – McqOptions

MCQOPTIONS

1.	The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation.
A.	Increases
B.	Decreases
C.	Remain constant
D.	May increase or decrease; depends on the material
Answer» E.

Discussion

No Comment Found

Related MCQs

Thermal conductivity of non-metallic amorphous solids with decrease in temperature
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by
When heat is transferred form hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by
When heat is Transferred by molecular collision, it is referred to as heat transfer by
Pick up the wrong case. Heat flowing from one side to other depends directly on
Thermal conductivity of air at room temperature in kcal/m hr C is of the order of
Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is
For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are
In case of surface condensers, a straight line is obtained on plotting 1/U vs. __________ on an ordinary graph paper.
When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids?