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
Related Mcqs:
- 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 - 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 - The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is ______________ BTU/hr?
A. 100
B. 200
C. 1000
D. 2000 - 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 - 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. - 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 - Otto cycle used in spark ignition petrol engines is also known as the constant ________________ cycle?
A. Volume
B. Pressure
C. Heat
D. None of these - Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?
A. Tempering
B. Hardening
C. Annealing
D. Normalising - Moist air is cooled along the line of constant ________________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs ?
A. Enthalpy
B. Relative humidity
C. Wet bulb temperature
D. Dew point temperature - The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?
A. 2300 J
B. 4600 J
C. 230 J
D. 2.3 × 106 J
