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a) drill ships
b) submersible
c) jackup
d) no correct variant

14. Most semisubmersible rigs have two or more … on which the rig floats.
a) masts
b) floors
c) pontoons
d) no correct variant

15.What is a long, relatively narrow, and hollow steel float with a rectangular or
round cross section called?
a) pontoon
b) jackup
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

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