• 1. The cutting forces when drilling are;

  ATorque that acts in the same direction of the drill rotations and back force that acts in the same direction of the drill feed. BTorque that acts in the opposite direction to the drill rotation and thrust which acts opposite to the drill feed.

• 2. A blind hole is what kind of hole?

  AA hole that stops before it exits the workpiece. BA hole that goes through to the opposite side of the workpiece. CA hole that has a step or chamfer in.

• 3. For the flute length of a drill, generally how many D are recommended for effective chip discharge?

  A3D B1D C2D

• 4. Solid carbide drills are best used on what type of machines?

  ABench drilling machines. BNC machining centres. CGeneral lathes.

• 5. High-speed steel drills are less prone to breakage and are therefore effective for use on?

  AMulti-task machining centres. BHigh spindle speed machines. CBench drilling machines.

• 6. Generally when selecting drills the following is correct:

  AIndexable drills are for smaller diameter holes, and high speed steel drills are for medium sized holes. BIndexable drills are for larger diameter holes, and solid carbide drills are for holes that require high tolerances. CIndexable drills are for larger diameter holes, and high speed steel drills are for holes that require high tolerances.
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  7. What kind of drills are used in the graph shown?

  A(1) High speed steel, (2) Solid carbide, and (3) Indexable insert drills. B[(1) Indexable insert drills, (2) Solid carbide, and (3) High speed steel. C(1) Solid carbide, (2) Indexable insert drills, and (3) High speed steel.

• 8. Which of the following 3 type of holders can be used to hold a solid carbide drill?

  ADouble angle collet. BKeyless drill chuck. CDrill chuck.

• 9. Gun drills are used for drilling of deep holes, in relation to the diameter how deep can gun drills machine?

  A300D. B400D C500D

• 10. In reference to the web taper of a drill which of the following is correct?

  AThe point of the web at the cutting edge is called thinning. BAs the web gets thinner, overall strength and rigidity of the drill increases. CThere are 2 types of taper geometry, parallel and taper.
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