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c) semi
d) no correct variant
16. Are drill ships mobile or not?
a) no
b) yes
c) no correct variant
17. A jackup rig is a widely used mobile …drilling unit
a) inland
b) offshore
c) no correct variant
18. Arctic submersibles therefore have a reinforced hull called …
a) a winch
b) a caisson
c) a bit
d) no correct variant
19. Find the meaning of the term “semi”:
a) any vertical spar for supporting sails, rigging, flags,etc., above the deck of a vessel or any
components of such a composite spar
b) a small, powerful boat for towing or pushing ships, barges, etc
c) short for semisubmersibles
d) no correct variant
20.Find the meaning of the term “drilling rig”:
a)t he act or process of drilling a borehole by means of a rotary-drill machine, such as in drilling
an oil well.
b) in engineering, a type of foundation most commonly used underwater for a bridge, but
sometimes used in building construction. It is a large hollow structure that is sunk down through
the earth by workers excavating from inside it.
c) a small, powerful boat for towing or pushing ships, barges, etc
d) no correct variant
21.Find the meaning of the term “caisson”:
a) in engineering, a type of foundation most commonly used underwater for a bridge, but
sometimes used in building construction. It is a large hollow structure that is sunk down through
the earth by workers excavating from inside it.
b) any vertical spar for supporting sails, rigging, flags,etc., above the deck of a vessel or any
components of such a composite spar
c) a vessel, usually flat-bottomed and with or without its own power, used for transporting
freight, esp on canals
d) no correct variant
22. Find the meaning of the term “mast”:
a) any vertical spar for supporting sails, rigging, flags,etc., above the deck of a vessel or any
components of such a composite spar
b) a small, powerful boat for towing or pushing ships, barges, etc
c) a vessel, usually flat-bottomed and with or without its own power, used for transporting
freight, esp on canals
d) no correct variant
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