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MCQs

Total Questions : 498 | Page 50 of 50 pages
Question 491. China and France, started an underground nuclear testing in
  1.    1980
  2.    2001
  3.    1996
  4.    2000
 Discuss Question
Answer: Option C. -> 1996
Answer: (c).1996
Question 492. "SONAR" stands for
  1.    Salt Navigation and Ranging
  2.    Sound Navigation and Rails
  3.    Sound Naval and Ranging
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Answer: (d).All of above
Question 493. Cracking in ice, produces sound pulses, approximately
  1.    0dB
  2.    300dB
  3.    30dB
  4.    20dB
 Discuss Question
Answer: Option C. -> 30dB
Answer: (c).30dB
Question 494. Sonar is used for scientific research and
  1.    Commercial purposes
  2.    safety
  3.    Housing
  4.    heat radiation
 Discuss Question
Answer: Option A. -> Commercial purposes
Answer: (a).Commercial purposes
Question 495. Higher sounds are mostly due to oscillations of bubbles in the
  1.    water
  2.    air
  3.    Atmosphere
  4.    environment
 Discuss Question
Answer: Option A. -> water
Answer: (a).water
Question 496. Wind blowing produces sounds in water, ranges between
  1.    50 Hz and 100 kHz
  2.    1 Hz and 1000 kHz
  3.    100Hz and 1000 kHz
  4.    1 Hz and 100 kHz
 Discuss Question
Answer: Option D. -> 1 Hz and 100 kHz
Answer: (d).1 Hz and 100 kHz
Question 497. Sources of sound in Ocean, examplified as
  1.    natural physical processes
  2.    marine life
  3.    man made sources
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Answer: (d).All of above
Question 498. Thunder and lightning raises noise level around
  1.    15 Hz
  2.    25 Hz
  3.    95 Hz
  4.    805 Hz
 Discuss Question
Answer: Option A. -> 15 Hz
Answer: (a).15 Hz

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