Related Questions

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
A CO
B SO2
C NOx
D CFC (chloro fluoro carbons)
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
A Thermosphere
B Stratosphere
C Troposphere
D Mesosphere
The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is
A Less
B More
C Equal
D May be less or more depending on temperature
A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.
A Sump
B Volute
C Vacuum
D Submerged
When the temperature of air leaving the inter-cooler, in a two stage compression with inter-cooler, is ________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.
A Equal to
B Less than
C More than
D None of these
Most of the atmospheric air pollutants are present in large quantity in
A Stratosphere
B Thermosphere
C Trophosphere
D Mesosphere
Viscosity of atmospheric air may be about __________ centipoise.
A 0.015
B 1.5
C 15
D 150
The most abundant constituent of atmospheric air is :
A Carbon
B Hydrogen
C Oxygen
D Nitrogen
Presence of high concentration of ozone and smog in atmospheric air causes the
A Embrittlement & decrease of folding resistance of paper
B Cracking of rubber products
C Fading of dye on textiles
D Damage of electrical insulator on high tension power line
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.
A 50
B 500
C 1000
D 3000 (i.e. 0.3%)

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