Related Questions

The most abundant element in the earth 's crust is oxygen . The second most abundant element is the earth's crust is -
A Hydrogen
B Silicon
C Nitrogen
D Brass
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
Which one is the most abundant gas in the air?
A Oxygen
B Nitrogen
C Carbon dioxide
D Methane
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
Select the word or phrase that is most closely opposite in meaning to the original word. Abundant
A Scarce
B Acrimonious
C Ingenuous
D Heavenly
The most abundant element in the Earth's crust is -
A Oxygen
B Hydrogen
C Carbon dioxide
D Silicon

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