Heat Transfer
In a forward feed multiple effect evaporator, the pressure is

Lowest in last effect
Dependent on the number of effects
Highest in last effect
Same in all effects

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Heat Transfer
Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer can not take place

Between two bodies in physical contact with each other
Both B & C
Between two bodies not in physical contact with each other
From one part of a body to the another part of the same body

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

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

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Heat Transfer
A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case,

Both the spheres will emit equal amount of radiation per unit time in the beginning
The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant
Both B & C
Both will absorb equal amount of radiation from the surrounding in the beginning

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Heat Transfer
Steam trap is used to

Condense the steam flowing in the pipeline
Remove water resulting from partial condensation of steam
Stop the supply of steam
None of these

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