Hydrographic Survey(Surveying ) Questions and Answers

Question 1. Determine the velocity of the sound in sea water if the surface temperature can be given as 32˚C and the salinity is given as 2.43.
  1.    1590.6 m/s
  2.    1509.6 m/s
  3.    5109.6 m/s
  4.    1590.9 m/s
Explanation:-
Answer: Option B. -> 1509.6 m/s
Answer: (b).1509.6 m/s
Question 2. Find the value of the surface temperature, if the velocity of the sound in sea water can be given as 2000 m/s and the salinity as 5.32.
  1.    57˚C
  2.    75˚C
  3.    52˚C
  4.    72˚C
Explanation:-
Answer: Option A. -> 57˚C
Answer: (a).57˚C
Question 3. The velocity of sound in sea can be determined by ____________
  1.    Refraction
  2.    Reflection
  3.    Polarization
  4.    Sounding machine
Explanation:-
Answer: Option D. -> Sounding machine
Answer: (d).Sounding machine
Question 4. Rain gauge is used for ________
  1.    Hydrological survey
  2.    Measuring precipitation
  3.    Marine survey
  4.    River survey
Explanation:-
Answer: Option B. -> Measuring precipitation
Answer: (b).Measuring precipitation
Question 5. Rain gauge is expressed in terms of _________
  1.    Decimeters
  2.    Meters
  3.    Centimeters
  4.    Millimeters
Explanation:-
Answer: Option D. -> Millimeters
Answer: (d).Millimeters
Question 6. Rain gauge is also known as __________
  1.    Udometer
  2.    Opto meter
  3.    Luda meter
  4.    Rio meter
Explanation:-
Answer: Option A. -> Udometer
Answer: (a).Udometer
Question 7. River gauge is used to measure _______
  1.    Still level
  2.    Water level
  3.    Turbulence
  4.    Current
Explanation:-
Answer: Option B. -> Water level
Answer: (b).Water level
Question 8. Which of the following instrument uses a rating curve?
  1.    River gauge
  2.    Rain gauge
  3.    Tipping bucket
  4.    Marine gauge
Explanation:-
Answer: Option A. -> River gauge
Answer: (a).River gauge
Question 9. Which of the following will not come under the classification of rain gauge?
  1.    Tipping bucket gauge.
  2.    Reflective rain gauge
  3.    Optical rain gauge
  4.    Acoustic rain gauge
Explanation:-
Answer: Option B. -> Reflective rain gauge
Answer: (b).Reflective rain gauge
Question 10. Acoustic rain gauge can also be known as__________
  1.    Hydro gauge
  2.    Hydro remote
  3.    Hydrophone
  4.    Hydro cable
Explanation:-
Answer: Option C. -> Hydrophone
Answer: (c).Hydrophone
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