31. Which of the following are repair docks ?
a) marine railways, dry docks, floating docks, wet docks
b) dry docks, wet docks, floating docks, lift docks
c) wet docks, floating docks, lift docks, marine railways
d) wet docks, lift docks, marine railways, dry docks
a) groynes
b) sea walls
c) revetments
d) moles
a) when the dock is empty
b) when the dock is empty with the ship of maximum tonnage
c) when the dock is full of water
d) when the dock is dry and is under construction
a) 5/8
b) 3/8
c) 3/16
d) 5/16
a) 90° with the face of the dock
b) 45° with the face of the dock
c) 30° with the face of the dock
d) 10° with the face of the dock
(i) Fender is the cushion provided on the face of the jetty for ships to come in contact,
(ii) Slip is the space of water area between two adjacent piers where ships are berthed,
(iii) Pier head is a structure constructed near the tip of a break water near the harbor entrance. Of the statements
a) (i) and (ii) are correct
b) (ii) and (iii) are correct
c) (i) and (iii) are correct
d) (i), (ii) and (iii) are correct
a) Dry dock
b) Wet dock
c) Floating dock
d) Refuge dock
a) marine railways, dry docks, floating docks, wet docks
b) dry docks, wet docks, floating docks, lift docks
c) wet docks, floating docks, lift docks, marine railways
d) wet docks, lift docks, marine railways, dry docks
Ans: c
32. Which of the following structures protects the shore by trapping of littoral drift?a) groynes
b) sea walls
c) revetments
d) moles
Ans: a
33. Which of the following conditions of loading imposes the greatest load on the foundation in case of dry docks?a) when the dock is empty
b) when the dock is empty with the ship of maximum tonnage
c) when the dock is full of water
d) when the dock is dry and is under construction
Ans: c
34. For designing the dock, the proportion of ship load assumed to be borne by keel blocks isa) 5/8
b) 3/8
c) 3/16
d) 5/16
Ans: a
35. A ship strikes the berth generally at an anglea) 90° with the face of the dock
b) 45° with the face of the dock
c) 30° with the face of the dock
d) 10° with the face of the dock
Ans: d
36. Consider the following statements.(i) Fender is the cushion provided on the face of the jetty for ships to come in contact,
(ii) Slip is the space of water area between two adjacent piers where ships are berthed,
(iii) Pier head is a structure constructed near the tip of a break water near the harbor entrance. Of the statements
a) (i) and (ii) are correct
b) (ii) and (iii) are correct
c) (i) and (iii) are correct
d) (i), (ii) and (iii) are correct
Ans: d
37. A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called.a) Dry dock
b) Wet dock
c) Floating dock
d) Refuge dock
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