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d) no correct variant

4. The fluid is usually a special liquid called …
a) “drilling mud”
b) “rotary mud”
c) “sland mud”
d) no correct variant

5. A fluid can be a liquid, a gas, or …
a) a combination of two
b) a flame
c) a mud
d) no correct variant

6. With the bit on bottom, the rig can rotate it in one of … ways.
a) two
b) three
c) four
d) no correct variant

7. What does a rotary bit have in comparison with a chisel?
a) bar
b) rows of teeth
c) bit
d) no correct variant

8.What is a bailer?
a) a hollow tube used to retrieve groundwater samples from monitoring wells
b) a machine for moving loads by means of a flexible element
c) the machine used to drill a wellbore
d) no correct variant

9. What is a winch?
a) a metal pipe or tube used as a lining for a water, oil, or gas well.
b) the machine used to drill a wellbore
c) a mechanical device that is used to pull in (wind up) or let out (wind out) or
otherwise adjust the "tension" of a rope or wire rope (also called "cable" or "wire
cable")
d) no correct variant

10. To understand the principle of cable-tool drilling, one should picture a …
a) an electric device
b) a digital technique
c) a child's seesaw
d) no correct variant

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