1. Branch of surveying which deals with bodies of water such as lake, sea & river etc. is called:
(A) Hydrographic survey
(B) Chain survey
(C) Compass survey
(D) Cadastral survey
2. Hydrographic survey is carried out for mapping of:
(A) Water bodies
(B) Plain areas
(C) Mountainous areas
(D) Boundaries
3. The process of measurement of depth below the water surface is called:
(A) Sounding
(B) Levelling
(C) Ranging
(D) Gauging
4. Propeller is the part of an instrument used in hydrographic survey:
(A) Fathometer
(B) Pilot tube
(C) Current meter
(D) Sounding machine
5. In hydrographic survey current meter is used to measure:
(A) Velocity of water
(B) Current of water
(C) Area of water
(D) Discharge of water
6. Another name of fathometer is:
(A) Transducer
(B) Rotameter
(C) Echo-meter
(D) Current meter
7. Pole used to determine sounding is called:
(A) Sounding rod
(B) Ranging rod
(C) Offset rod
(D) Depth pole
8. Length of sounding rod varies from:
(A) 7 to 10 m
(B) 5 to 8 m
(C) 9 to 12 m
(D) 11 to 14 m
9. Lead line is used for measuring:
(A) Sounding
(B) Levelling
(C) Bearing
(D) Horizontal distance
10. In hydrographic survey, float is used to determine:
(A) Quality of water
(B) Depth of water
(C) Velocity of water
(D) Volume of water
11. An instrument used to measure depth of sea water is called:
(A) Lead line
(B) Sounding rod
(C) Echo sounder
(D) Current meter
12. The quantity of water flowing through a channel per unit time is called:
(A) Mass rate flow
(B) Discharge
(C) Viscosity
(D) Volume
13. Unit of discharge is:
(A) m/sec
(B) cum/sec