Class 16 - Quiz
1. The amount of rock material extracted from a specified drill interval compared to the amount which theoretically should have come from the interval is called the _____________.
A. splitB. RQD
C. recoveryD. core barrel
2. If five and one half drill stems are in the ground for a typical diamond drill hole, approximately how deep is the drill hole?
A. 55 feetB. 58 feetC. 60 feetD. 65 feet
3. A 6 inch thick quartz vein in a piece of core is located at the end of the second compartment in the third core box. What is the approximate depth of the vein?
A. 21 feetB. 29 feetC. 35 feetD. 25 feet
4. Which type of information could not be gathered when logging RVC chips?
A. carbonate alterationB. quartz vein thicknessC. scheelite contentD. lithology
5. Which type of bit would not be very effective at drilling a quartzite?
A. center-return hammer bit
B. diamond bit
C. tricone bit
D. side-return hammer bit
6. A Jones splitter would be used in which of the following situations?
A. drilling granite 20 feet below the surfaceB. drilling with a tricone bit below the water tableC. drilling a water wellD. drilling greenstone below the water table
7. If a drill section is oriented at an azimuth of 45, the drill hole trace has an azimuth of 25, and the actual inclination of the drill hole is –60 degrees, what is the apparent dip angle which should be shown on the drill section?
A. 57.5 degreesB. 54 degrees, 49 minutesC. 36 degrees, 15 minutesD. 62.5 degrees
8. If 9.5 feet of core is recovered from a 10 foot run, the recovery is _____________.
A. 92 %
B. 95 %
C. 89 %
D. 98 %
9. What is the advantage of creating digital drill logs?
A. drill sections can be created by computer
B. statistical information can be calculated with ease
C. logging is standardized and becomes fasterD. all of the above
10. A cyclone is used to ____________________.
A. to predict weather patterns
B. decelerate rock chips
C. inject drilling mud
D. cool the bit