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Question: In case of __________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface.
[A].

nucleate

[B].

local

[C].

pool

[D].

saturated

Answer: Option B

Explanation:

No answer description available for this question.

Question: Evaporation of 1kg of water from a solution in a single effect evaporator requires about __________ kg of steam.
[A].

0.4 – 0.6

[B].

1-1.3

[C].

1.8-2

[D].

2 – 2.4

Answer: Option B

Explanation:

No answer description available for this question.

Question: Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?
[A].

Long vertical evaporator

[B].

Horizontal tube evaporator

[C].

Agitated film evaporator

[D].

Calenderia vertical tube evaporator

Answer: Option C

Explanation:

No answer description available for this question.

Question: Black liquor generated during paper manufacture is concentrated in a
[A].

single effect evaporator.

[B].

single effect evaporator followed by a crystalliser.

[C].

multiple effect evaporator.

[D].

multiple effect evaporators followed by a crystalliser.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Forced circulation evaporators are normally used for concentrating liquids having
[A].

scaling characteristics

[B].

high viscosity

[C].

both(a) & (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: A __________ evaporator employs an annular downtake.
[A].

basket type

[B].

horizontal

[C].

long tube vertical

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case,
[A].

the cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant.

[B].

both the spheres will emit equal amount of radiation per unit time in the beginning.

[C].

both will absorb equal amount of radiation from the surrounding in the beginning.

[D].

both(b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: A black body does not __________ radiation.
[A].

absorb or emit

[B].

refract

[C].

reflect

[D].

both(b) & (c)

Answer: Option D

Explanation:

No answer description available for this question.