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

Related Mcqs:

1. Use of natural draft cooling tower is practised, when the air has low ?

   A. Humidity
   B. Temperature
   C. Both A. & B.
   D. Neither A. nor B.

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. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the________________________?

   A. Range is 15°F
   B. Approach is 10°F
   C. Both A. & B.
   D. Neither A. nor B.

6. When the temperature and humidity of air is low, we usually use _______________ draft cooling tower?

   A. Natural
   B. Forced
   C. Induced
   D. None of these

7. The temperature of water cooled in cooling tower is always _________________ temperature of entering air?

   A. More than the wet bulb
   B. Less than the wet bulb
   C. Equal to the wet bulb
   D. Equal to the dry bulb

8. H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?

   A. 2.0
   B. 1.56
   C. 1.0
   D. 0.56

9. In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalent to a theoretical plate HTUOG = overall gas phase height of a transfer unit) ?

   A. Straight
   B. Parallel
   C. Both A. & B.
   D. Neither A. nor B.

10. 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