Question

1. the flutes of a drill bit:

a) form the cutting edges on the point.
b) allow the chips to escape.
c) cause the chips to curl.
d) permit cutting oil to reach the cutting edges.
e) all of the above.

1. the web of a drill bit:

a) separates the flutes.
b) is the supporting section of the bit.
c) gradually increases in thickness throughout its length.
d) all of the above.

1. the risk of the drill bit grabbing the work or breaking:

a) increases as the bit is breaking through the workpiece.
b) can be avoided by using adequate lubricant.
c) can be minimized by running the drill faster.
d) only occurs when drilling hardened steels.

1. a v - block should be used when drilling holes in:

a) round material.
b) angle iron.
c) non - ferrous material.
d) items where very accurate hole dimensions are needed.

1. hand drills are rated by the:

a) horsepower rating.
b) maximum rpm.
c) depth they can drill.
d) size of the chuck.

1. tapered shanks are most common on:

a) small drill bits.
b) large drill bits.
c) number drill bits.
d) letter drill bits.

1. slots in the drill press table are provided for:

a) mounting the drill head.
b) draining the cutting fluid.
c) clamping jigs to the table.
d) securing the column.

1. a magnetic base drill press is an advantage when:

a) drilling non - ferrous metals.
b) very accurate drilling is required.
c) holes are drilled in the vertical plane.
d) the cutting chips need to be recovered.

Explanation:

1. Flutes of a drill - bit form cutting edges, allow chips to escape, cause chips to curl and permit cutting oil to reach cutting edges.
2. The web of a drill - bit separates flutes, is the supporting section and gradually increases in thickness.
3. The risk of drill - bit grabbing or breaking increases when breaking through workpiece and can be avoided with adequate lubricant.
4. V - blocks are used for round material during drilling to hold it in place.
5. Hand drills are rated by the size of the chuck which holds the drill - bit.
6. Tapered shanks are common on large drill - bits for better torque transfer.
7. Slots in drill press table are for clamping jigs to the table.
8. A magnetic base drill press is advantageous for very accurate drilling as it provides a stable base.

Answer:

1. e) all of the above
2. d) all of the above
3. b) can be avoided by using adequate lubricant
4. a) round material
5. d) size of the chuck
6. b) large drill bits
7. c) clamping jigs to the table
8. b) very accurate drilling is required