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MCQs

Total Questions : 498 | Page 49 of 50 pages
Question 481. Life expentancy of PAHs are usually much shorter in
  1.    Sea
  2.    Oceans
  3.    clear water
  4.    rivers
 Discuss Question
Answer: Option C. -> clear water
Answer: (c).clear water
Question 482. During combustion, originated PAHs are called
  1.    pyrogenic PAHs
  2.    Aromatic carbons
  3.    Hydrocarbons
  4.    organic compounds
 Discuss Question
Answer: Option A. -> pyrogenic PAHs
Answer: (a).pyrogenic PAHs
Question 483. Coal tar creosote be composed of up to 90% of
  1.    Alkaline
  2.    Alkane
  3.    Aliphatic
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Answer: (d).All of above
Question 484. In 1996, a Comprehensive Test Ban Treaty was signed by all countries, aiming at stoppng
  1.    nuclear testing
  2.    fishing
  3.    researches
  4.    pollution
 Discuss Question
Answer: Option A. -> nuclear testing
Answer: (a).nuclear testing
Question 485. Soviet Union started underground nuclear weapon testing in
  1.    1992
  2.    1978
  3.    1980
  4.    1963
 Discuss Question
Answer: Option D. -> 1963
Answer: (d).1963
Question 486. Underground tests in United States started in
  1.    2000
  2.    1992
  3.    1998
  4.    1991
 Discuss Question
Answer: Option B. -> 1992
Answer: (b).1992
Question 487. Drilling causes loud sounds, about
  1.    200dB
  2.    190dB
  3.    300dB
  4.    150dB
 Discuss Question
Answer: Option B. -> 190dB
Answer: (b).190dB
Question 488. Military sonars, used in targeting
  1.    localisation
  2.    detection of biomass
  3.    detection of fishes
  4.    animals
 Discuss Question
Answer: Option A. -> localisation
Answer: (a).localisation
Question 489. Dredging deliver sounds with an average intensity, ranges between
  1.    360-780 dB
  2.    160-780 dB
  3.    160-180 dB
  4.    160-700 dB
 Discuss Question
Answer: Option C. -> 160-180 dB
Answer: (c).160-180 dB
Question 490. Mid frequency sonars are participated in submarine detection and
  1.    weapon activation
  2.    biomass detection
  3.    measurement of soil
  4.    fire detection
 Discuss Question
Answer: Option A. -> weapon activation
Answer: (a).weapon activation

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