A. Single effect evaporator
B. Single effect evaporator followed by a crystalliser
C. Multiple effect evaporator
D. Multiple effect evaporators followed by a crystalliser
Related Mcqs:
- Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats ?
A. P and Q
B. P and R
C. P and S
D. R and S - The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body)?
A. αT
B. α × 1/T
C. α T4
D. Independent of T - In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?
A. Velocity of circulation
B. Liquor-film co-efficient
C. Both A. and B.
D. Neither A. and B. - In case of a vertical tube evaporator, with increase in the liquor level, the___________________?
A. Capacity of the evaporator is decreased
B. Capacity of the evaporator is increased
C. True temperature drop increases
D. Both B. and 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 - Increasing the liquor level in the evaporator results in the_______________?
A. Decreased capacity
B. Increase in liquor film co-efficient
C. Decreased effect of hydrostatic head
D. Increased true temperature drop - In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient______________?
A. Increases
B. Decreases
C. Is not affected
D. May increase or decrease; depends on the feed - The type of liquor circulation system to be ‘ employed in evaporators (viz. natural or forced circulation) is determined mainly by the ______________ of the liquid?
A. Viscosity
B. Density
C. Thermal conductivity
D. Corrosive nature - Fruit juice (a heat sensitive material) can be concentrated in a ____________ evaporator?
A. Long tube
B. Falling film
C. High 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
multi-effect system
D. Heat transfer co-efficient in a single effect is much lower than that in any effect in a multieffect
system
