Free General Drilling Practice Questions

Sample Practice Questions

Try these 10 sample questions from the General Drilling practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1In cable-tool drilling, which tool removes slurry after the drill string is pulled?

   1. A. Reamer
   2. B. Bailer
   3. C. Swivel
   4. D. Drive clamp

   Answer: B

   Explanation: Nebraska's Drilling Methods material states: "The bailer is used to remove slurry from the hole so that efficient penetration can continue." The bailer performs the slurry-removal task.

   Reference: Drilling Methods — Drilling Methods, Hole Making Methods

2. 2Which cable-tool component supplies the force used to drive casing?

   1. A. Sand line
   2. B. Swivel
   3. C. Drive clamp
   4. D. Mud balance

   Answer: C

   Explanation: The official Drilling Methods material says: "The driving force is provided by a drive clamp attached to the drill string." Therefore the drive clamp supplies the force.

   Reference: Drilling Methods — Drilling Methods, Cable Tool Casing Driving Equipment

3. 3What protects the top of casing from damage while it is driven during cable-tool drilling?

   1. A. Drill collar
   2. B. Reamer
   3. C. Drive shoe
   4. D. Drive head

   Answer: D

   Explanation: The official material explains: "A drive head is fitted or screwed to the top of the casing to protect the casing from damage when being driven." The protective component is the drive head.

   Reference: Drilling Methods — Drilling Methods, Cable Tool Casing Driving Equipment

4. 4Why is a cable-tool rig particularly suitable for a remote well site?

   1. A. It requires a continuous large water supply
   2. B. It has low fuel and water needs and is reliable
   3. C. It must be operated by a large crew
   4. D. It depends on high-capacity mud pumps

   Answer: B

   Explanation: Nebraska's material identifies "low fuel consumption, small needs for water and other materials and reliability" as reasons cable tool is excellent for remote locations. Those characteristics support remote work.

   Reference: Drilling Methods — Drilling Methods, Advantages of the cable tool

5. 5On a rotary rig, which component carries the drill-string weight while allowing the string to rotate freely?

   1. A. Drive shoe
   2. B. Bailer
   3. C. Swivel
   4. D. Sand line

   Answer: C

   Explanation: The Drilling Methods material says the swivel "carries the entire weight of the drill string, but allows it to rotate freely." The swivel has both functions.

   Reference: Drilling Methods — Drilling Methods, Rotary Drilling, Rotating Equipment

6. 6For which formation are blade or drag bits primarily intended?

   1. A. Extremely hard crystalline rock
   2. B. Massive unfractured granite
   3. C. Hard cemented quartzite
   4. D. Unconsolidated formations

   Answer: D

   Explanation: Nebraska's Drilling Methods material describes blade or drag bits as being "for drilling unconsolidated formations." They are the appropriate choice for that formation type.

   Reference: Drilling Methods — Drilling Methods, Blade or Drag Bits

7. 7Which roller-cone tooth configuration is used for a soft formation?

   1. A. Short-toothed bit
   2. B. Long-toothed bit
   3. C. Smooth toothless cone
   4. D. Diamond coring crown

   Answer: B

   Explanation: The official material states: "Long tooth roller cone bits are used for soft formation with short-toothed bits used from hard formations." A long-toothed bit matches soft material.

   Reference: Drilling Methods — Drilling Methods, Steel Tooth Rotary Bits

8. 8Which bit type is designed to drill extremely hard rock formations?

   1. A. Bucket auger
   2. B. Fishtail drag bit
   3. C. Diamond bit
   4. D. Bailer

   Answer: C

   Explanation: Nebraska's Drilling Methods material says diamond bits have industrial diamonds implanted in them "to drill through extremely hard rock formations." A diamond bit is therefore correct.

   Reference: Drilling Methods — Drilling Methods, Diamond Bits

9. 9Which setting best matches reverse-circulation mud rotary drilling?

   1. A. A narrow bore in massive hard rock
   2. B. A dry shallow hole with no makeup water
   3. C. A hand-driven point through thin soil
   4. D. A large-diameter bore in unconsolidated formations

   Answer: D

   Explanation: The official material says: "Reverse mud is a cost-effective method for drilling bore holes of 24’ and greater. This method is most successful in unconsolidated formations." A large-diameter unconsolidated bore is the best match.

   Reference: Drilling Methods — Drilling Methods, Reverse circulation drilling

10. 10Which method does Nebraska's drilling material identify as the fastest for hard-formation penetration?

    1. A. Bucket augering
    2. B. Down-the-hole hammer
    3. C. Jet drilling
    4. D. Hand driving

    Answer: B

    Explanation: Under advantages of the down-the-hole hammer, the official material lists "Fastest hard formation penetration method". The down-the-hole hammer is therefore the identified method.

    Reference: Drilling Methods — Drilling Methods, Advantages of Down the Hole Hammer