Heat Transfer
Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.

1 to 100
100 to 1000
0.5 to 50
10 to 100

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat sensitive material can be handled
Equal heat transfer co-efficients exist in various effects
Most concentrated liquid is at highest temperature
There is no additional cost of pumping

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 amount of vapor produced per Kg of feed steam in a multiple effect system is much higher than in a single effect
Heat transfer co-efficient in a single effect is much lower 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

ANSWER DOWNLOAD EXAMIANS APP