The most efficient cooling tower out of the following is_____________________?

Related Mcqs:

1. A natural draft cooling tower is filled with wooden grids, which covers about _________________ percent of the tower height?

   A. 10-15
   B. 30-40
   C. 70-80
   D. 90-100

2. The cooling effect in a cooling tower can be speeded up by _______________________?

   A. Increasing the air velocity and area of exposed wet surface
   B. Reducing the barometric pressure
   C. Reducing the humidity of the air
   D. All A., B. and C.

3. The cooling effect in a cooling tower cannot be increased by_____________________?

   A. Increasing the air velocity over the wet surfaces
   B. Reducing the humidity of entering air
   C. Lowering the barometric pressure
   D. None of these

4. The term “cooling range” in a cooling tower refers to the difference in the temperature of____________________?

   A. Cold water leaving the tower and the wet bulb temperature of the surrounding air
   B. Hot water entering the tower and the wet bulb temperature of the surrounding air
   C. Hot water entering the tower and the cooled water leaving the tower
   D. None of these

5. Pressure drop through plate tower as compared to that through packed tower, for the same duty will be___________________?

   A. Less
   B. More
   C. Equal
   D. Either A. or B.; depends on the packing height

6. At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid _______________ that in dry packed tower ?

   A. Is greater than
   B. Is lower than
   C. Is same as
   D. Cannot be predicted as data are insufficient

7. In a moderately sized packed absorption tower, channelling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter ?

   A. > 4 :1
   B. < 8 : 1
   C. > 8:1
   D. < 6:1

8. A packed tower compared to a plate tower for a particular mass transfer operation__________________?

   A. Incurs smaller pressure drop
   B. Allows installation of cooling coils
   C. Is less costly when built in large sizes/diameters
   D. Is more suitable, if suspended solids are present in fluid streams

9. _______________ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower?

   A. Sherwood
   B. Stanton
   C. Lewis
   D. Peclet

10. Can a cooling tower cool water below the wet bulb temperature of inlet air ?

    A. Yes
    B. No
    C. Yes; but height of cooling tower will be prohibitively high
    D. Yes; but the air flow rate should be excessively high