Question

1. ____ is used to make the faces for soft hammers.

a. brass
b. lead
c. plastic or rubber
d. all of the above.

1. when drilling a hole, starting the drill can be assisted by using a(n) ____ punch first to make a small depression.
2. a prick punch has a point angle of __ and a center - punch has a point angle of __.

a. 60°, 80°
b. 60°, 90°
c. 45°, 90°
d. 90°, 60°

1. a cylindrical punch used for driving straight pins, tapered pins, and roll pins is called a(n) ____.
2. a(n) ____ punch is often used to align holes in mating parts.
3. a cold chisel for shearing bolts, pins, or rivets should have a cutting edge angle of about __. for shearing sheet metal, the cutting edge angle should be about __.

a. 90°, 60°
b. 45°, 60°
c. 60°, 90°
d. 90°, 45°

1. for shearing bolts or rivets, the cutting edge of a cold chisel should be ____.

a. curved
b. straight

1. when using punches or chisels, __ or __ must be worn.
2. when the hammered end of a punch or cold chisel becomes flared or mushroomed, it should be ____ to its original shape.
3. the tool used to pull a gear from a shaft is called a(n) ____.
4. when small items are accidentally dropped into small crevices or recesses, __ and __ tools can often be used to retrieve them.

Explanation:

1. Soft hammers often have faces made of plastic or rubber for non - marring applications. Brass can also be used. Lead is too soft and not commonly used for this purpose. But plastic or rubber are the most typical, so the answer is c.
2. A center punch is used to make a small depression to assist in starting a drill.
3. A prick punch has a point angle of 60° and a center punch has a point angle of 90°.
4. A drift punch is used for driving straight pins, tapered pins, and roll pins.
5. A dowel punch is often used to align holes in mating parts.
6. For shearing bolts, pins, or rivets, a cold chisel should have a cutting edge angle of about 90°. For shearing sheet metal, it should be about 60°. So the answer is a.
7. For shearing bolts or rivets, the cutting edge of a cold chisel should be straight.
8. When using punches or chisels, safety glasses or goggles must be worn to protect the eyes from flying debris.
9. When the hammered end of a punch or cold chisel becomes flared or mushroomed, it should be ground to its original shape to prevent fragments from flying off.
10. The tool used to pull a gear from a shaft is called a puller.
11. When small items are accidentally dropped into small crevices or recesses, magnets and pick - up tools can often be used to retrieve them.

Answer:

1. c. Plastic or rubber
2. center
3. 60°, 90°
4. drift punch
5. dowel
6. a. 90°, 60°
7. b. straight
8. safety glasses, goggles
9. ground
10. puller
11. magnets, pick - up