Heat Transfer
For a perfectly transparent surface (like gases), the

Absorptivity = 0
Transmissivity = 1
Reflectivity = 0
All of these

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
A dilute aqueous solution is to be concentrated in an evaporator system. High pressure steam is available. Multiple effect evaporator system is employed, because

Boiling point elevation in a single effect system is much higher than that in any effect in a multieffect system
Total heat transfer area of all the effects is -less than that in a single effect evaporator system
Heat transfer co-efficient in a single effect is much lower than that in any effect in a multieffect system
Total amount of vapor produced per Kg of feed steam in a multiple effect system is much higher than in a single effect

ANSWER DOWNLOAD EXAMIANS APP