Related Questions

For air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is
A Zero
B 20
C 50
D 100
Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has
A High bond dissociation energy
B Smaller atomic radius
C Stable half filled 2p sub level
D High nuclear charge
Through nitrogen fixation process nitrogen in the atmosphere is converted into
A Ammonium
B Hydroxide
C Nitrate
D Chlorite
Of the 65 cars on a car lot, 45 have air conditioning, 30 have power windows, and 12 have both air conditioning and power windows. how many of the cars on the lot have neither air conditioning nor power windows?
A 2
B 8
C 12
D 18
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of
A 2
B 20.8
C 20.2
D 20.5
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be
A Cooled and humidified
B Cooled and dehumidified
C Heated and humidified
D Heated and dehumidified
The rainfall due to upward movement of air caused by convergence of cold air masses against warm air masses is called ________.
A Cyclonic rainfall
B Orographic rainfall
C Frontal rainfall
D Convectional rainfall
Where cold surface air replaces warm air, the boundary separating the different bodies of air is:
A A parallel of latitude
B A tornado
C A cold front
D A warm front
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
A Cooled and dehumified
B Heated and humidified
C Cooled and humidified
D Heated and dehumidified
What percentage of atmosphere is Nitrogen?
A 21%
B 20.95%
C 78.09%
D 0.93%

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