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ENVIRONMENTAL SCIENCE MCQs

Total Questions : 2671 | Page 49 of 268 pages
Question 481. Sedimentation is a
  1.    Primary water treatment
  2.    Secondary water treatment
  3.    Tertiary water treatment
  4.    Final process
 Discuss Question
Answer: Option A. -> Primary water treatment
Question 482. The amount of force exerted over an area of surface is called:
  1.    Density
  2.    Weight
  3.    Temperature
  4.    Pressure
 Discuss Question
Answer: Option D. -> Pressure
Question 483. Black lung disease is associated with
  1.    Farmers
  2.    Coal miners
  3.    Textile industry workers
  4.    Sweepers
 Discuss Question
Answer: Option B. -> Coal miners
Question 484. What are rodenticides?
  1.    That kill fishes
  2.    That kill insects
  3.    That kill rats
  4.    That kill crocos
 Discuss Question
Answer: Option C. -> That kill rats
Question 485. When the air is saturated, which of the following statements is not correct?
  1.    The air temperature equals the wet-bulb temperature
  2.    The relative humidity is 100 percent
  3.    The air temperature equals the dew point temperature
  4.    An increase in temperature will cause condensation to occur
  5.    The wet bulb temperature equals the dew point temperature
 Discuss Question
Answer: Option D. -> An increase in temperature will cause condensation to occur
Question 486. Meteorology is the study of:
  1.    Landforms
  2.    The oceans
  3.    The atmosphere
  4.    Outer space
  5.    Extraterrestrial meteoroids that enter the atmosphere
 Discuss Question
Answer: Option C. -> The atmosphere
Question 487. The earth's radiative equilibrium temperature is:
  1.    The temperature at which the earth is absorbing solar radiation and emitting infrared radiation at equal rates
  2.    The temperature at which the earth is radiating energy at maximum intensity
  3.    The average temperature the earth must maintain to prevent the oceans from freezing solid
  4.    The temperature at which rates of evaporation and condensation on the earth are in balance
 Discuss Question
Answer: Option A. -> The temperature at which the earth is absorbing solar radiation and emitting infrared radiation at equal rates
Question 488. Killing of animals disturbs
  1.    Good for eco system
  2.    Good for man
  3.    The balance of nature
  4.    None
 Discuss Question
Answer: Option C. -> The balance of nature
Question 489. A biomass pyramid is important because it illustrates
  1.    How energy flows through a food web
  2.    The number of species in each tropic level
  3.    The biomass of all organisms at each tropic level in a system
  4.    The number of tropic levels in a system
 Discuss Question
Answer: Option D. -> The number of tropic levels in a system
Question 490. Low clouds retard surface cooling at night better than clear skies because:
  1.    The clouds absorb and radiate infrared energy back to earth
  2.    The water droplets in the clouds reflect infrared energy back to earth
  3.    The clouds start convection currents between them
  4.    The clouds are better conductors of heat than is the clear night air
  5.    The formation of the clouds releases latent heat energy
 Discuss Question
Answer: Option A. -> The clouds absorb and radiate infrared energy back to earth

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