Docks and Harbours - Section 1 (1)

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Docks and Harbours - Section 1

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1.

Pick up the correct statement from the following:

A.	The tides at any place occur a little less than 1 hour later, each succeeding day
B.	The difference in time in solar hours and minutes from any lunar transit to the succeeding transit, is called high water level
C.	The influence of the earth's gravity alone produces level-tidal less sea
D.	The spinning force is maximum at the equator and zero at the poles
E.	All of the above.

Answer: Option E

Explanation:

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2.

The width of the entrances of the harbours is restricted to

A.	100 m
B.	125 m
C.	150 m
D.	180 m

Answer: Option D

Explanation:

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3.

A roadstead :

A.	is a protected area of water where boats can move safely
B.	is the end of the road at the harbour
C.	may be protected by break water walls
D.	none of these.

Answer: Option A

Explanation:

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4.

In a wet dock system,

A.	minimum required depth of water for the vessels is maintained
B.	entrance locks are provided with massive gates
C.	the locks of dock gate are operated by means of heavy bascule bridges and connected machinery
D.	the cost of construction is quite heavy
E.	all the above.

Answer: Option

Explanation:

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5.

Pick up the incorrect statement from the following:

A.	As a wave of sea water approaches the coast line, it is generally accompanied by a drift of water in the direction of wave advance
B.	The on-shore wind helps to produce wave action as well as rise of M.S.L.
C.	A falling hydraulic gradient occurs in the direction of the wave
D.	The wave while receding carries finer particles out to deep water.

Answer: Option C

Explanation:

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6.

Pick up the correct statement from the following :

A.	a harbour without any port complex, is called a refuge harbour
B.	a harbour used for fishery, is called fishery harbour
C.	the terminal building of a commercial harbour consists of an administrative block, customs clearance and ware-houses.
D.	all the above.

Answer: Option D

Explanation:

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7.

Pick up the correct statement from the following:

A.	the Mediterranean sea is considered to be a huge harbour
B.	the Caspean sea is considered to be a big harbour
C.	the Red sea is considered to be harbour
D.	none of the above.

Answer: Option A

Explanation:

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8.

For location of soundings a range and one angle from the shore involves the following operations. Which one is correct ?

A.	A range line is established
B.	The first and the last soundings and every tenth soundings are fixed by angular observations
C.	The intermediate soundings are fixed by the time intervals
D.	All the above.

Answer: Option D

Explanation:

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