Related Questions

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
The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the
A Solution has an elevation of boiling point
B Evaporators operate under vacuum
C Evaporators opreate at atmospheric pressure
D None of these
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
The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is
A Same
B More
C Less
D More or less depending on ambient conditions
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 nth
B $${\left( {\frac{1}{{\text{n}}}} \right)^{{\text{th}}}}$$
C 0.5 nth
D 1.5 nth
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
A Is economical in operation
B Employs high velocity, high heat transfer rate and less heating surface requirement
C Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle
D Both B & C
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
The capacity of computer memory is increasing exponentially . At the same time increased capacity is becoming available at cheaper rate. Two years ago 1GB RAM cost TK. 5,000. Now 4GB Ram is available at the same price. If this trend continues what capacity of RAM will you get for TK. 5,000 after 3 years time ?
A 32GB
B 80GB
C 60.72GB
D 76GB
In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator.
A Increases
B Decreases
C Remains constant
D May increase or decrease, depends on the vacuum
Each of the following problem has a question and two statements which are labeled 1. and. Use the data given in 1. and 2. to decide whether the statements are sufficient to answer the question.Select one of the following . a.Statements (1) ALONE is sufficient,but (2) ALONE is not sufficient. b.Statements (2) ALONE is sufficient,but (1) ALONE is not sufficient. c. Both statement TOGETHER are sufficient but statement alone is sufficient . Is K a multiple of 6? (1)K is a multiple of 3. (2) K is a multiple of 12.
A A
B B
C C
D D

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