The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is ______________ BTU/hr?

Related Mcqs:

1. Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the ______________ temperature of air?

   A. Wet bulb
   B. Dry bulb
   C. Saturation
   D. Dew point

2. Evaporative cooling process employs a combination of cooling and humidification in which the____________________?

   A. Sensible heat is added
   B. Sensible heat is removed and the latent heat is added
   C. Latent heat is removed
   D. Sensible heat is added and latent heat is removed

3. One ton of refrigeration is not equivalent to the heat removal rate of ____________________?

   A. 200 BTU/minute
   B. 50 kcal/minute
   C. 50 kJ/sec
   D. 3.5 KW

4. The minimum temperature to which the water can be cooled in a cooling tower is the ______________ temperature of air?

   A. Ambient
   B. Dry bulb
   C. Dew point
   D. Wet bulb

5. Out of the following substances, one ton of ______________ will store the maximum heat for a rise of 30°C in temperature ?

   A. Steel
   B. Lignite
   C. Water
   D. Lime stone

6. In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that ?

   A. Compared to the mass flow rate of cooling water, the rate of condensation of steam is
   invariably smaller
   B. Maintaining vacuum on tube side is more difficult than that on the shell side
   C. Water velocity can be increased conveniently to increase the overall heat transfer co-efficient
   because of its lower specific volume compared to steam
   D. Condenser can act as a storage unit for condensed steam

7. Glycerine is used as a coolant in cooling of some engines instead of water, because___________________?

   A. Its higher boiling point (290°C) increases its heat carrying capacity
   B. Comparatively less weight of coolant is required
   C. Smaller radiator can be used
   D. All a, b & c

8. 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.

9. The usual energy consumption in electric arc furnace steel making is _____________ KWh/ton of steel ?

   A. 60 – 100
   B. 400 – 700
   C. 1200 -1500
   D. 2000 – 2300

10. Production of one ton of paper in Indian paper industry consumes about ____________ kWh of electricity ?

    A. 300
    B. 800
    C. 1400
    D. 2000