Page 61 - 4924
P. 61
c) six;
d) no correct answer.
19. When the driller rotates the core barrel, it cuts a …, or core, of rock.
a) circle;
b) cylinder;
c) triangle;
d) no correct answer.
20. The core is often several … in diameter and several feet (or metres) long.
a) several metres;
b) several inches;
c) several centimetre;
d) no correct answer.
21. As the core barrel cuts the core, the core moves into a … in the barrel.
a) hole;
b) tube;
c) crack;
d) no correct answer.
22. At the surface, the core is removed and shipped to a laboratory for ...
a) putting out;
b) thorough analysis;
c) hiding;
d) no correct answer.
23. The second coring method uses a ...
a) chisel;
b) bit;
c) sidewall sampler;
d) no correct answer.
24. The explosion rams several small … into the wall of the hole.
a) bits;
b) cylinders;
c) chisels;
d) no correct answer.
25. Sidewall samplers can obtain up to thirty small samples from any depth.
a) fifty;
b) five;
c) thirty;
d) no correct answer.
59
