For evaporation of viscous solution in a multiple effect evaporator, the prefered feeding scheme is

Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation

A

Increases capacity

B

Increases economy

C

Does not affect the capacity

D

Both B & C

For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in

A

Increased economy

B

Decreased economy

C

Lower capacity

D

No effect on economy

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

A

Total heat transfer area of all the effects is -less than that in a single effect evaporator system

B

Total amount of vapor produced per Kg of feed steam in a multiple effect system is much higher than in a single effect

C

Boiling point elevation in a single effect system is much higher than that in any effect in a multieffect system

D

Heat transfer co-efficient in a single effect is much lower than that in any effect in a multieffect system

A multiple effect evaporator as compared to a single effect evaporator of the same capacity has

A

Lower heat transfer area

B

Lower steam economy

C

Higher steam economy

D

Higher solute concentration in the product

For the same heat transfer area and the terminal conditions, the ratio of the capacities of a single effect evaporator to a triple effect evaporator is

A

3

B

0.33

C

1

D

1.33

Eclusive breast feeding কথাটি কতদিন breast feeding করার কথা বুঝায়?

A

১ বছর

B

২ বছর

C

৬ মাস

D

১০ মাস

For hot feed, forward feeding as compared to backward feeding results in __________ economy.

A

Increased

B

Decreased

C

No effect on

D

None of these

In a multiple effect evaporator, the effect of boiling point elevation is to

A

Reduce the capacity

B

Reduce the economy

C

Increase the economy

D

None of these

In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.

A

n^th

B

$${\left( {\frac{1}{{\text{n}}}} \right)^{{\text{th}}}}$$

C

0.5 n^th

D

1.5 n^th

Solution X contains 7% (by weight) of liquid M and solution Y contains 14.5% (by weight) of liquid M. If 3 grams of solution X is mixed with 2 grams of solution Y, then liquid M accounts for what percent of the weight of the resulting solution?

A

6.09%

B

10%

C

10.75%

D

21.5%

For evaporation of viscous solution in a multiple effect evaporator, the prefered feeding scheme is

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