Metals

Question 1

What are sheet metals?

Answer 1

Metals that are form into thin, flat pieces mostly by rolling or hammering.

Question 2

What are sheet metals folded to make?

Answer 2

Boxes, trays and containers.

Question 3

What is the size of the sheet metal use?

Answer 3

0.4–6mm

Question 4

Another name for patterns?

Answer 4

Stretch-out.

Question 5

Sheet metal patterns development falls into two basic classifications what are they?

Answer 5

Parallel-line development those that unfold into rectangular patterns.
Radial-line development unfold into triangular patterns.

Question 6

What is use when cutting the layout of the sheet metal?

Answer 6

Snips or hang shears.

Question 7

What other than metal can be use for sheet metal patterns?

Answer 7

Plastic or wood.

Question 8

Categories of safety.

Answer 8

General safety, Personal safety, Machine Safety and Bench and hand tools safety.

Question 9

What are THREE safety rules for hand tools?

Answer 9

1. Chisel head must be free of burrs.
2. Files need good handles.
3. Use the correct tools for purpose.

Question 10

What are THREE safety rules for machine?

Answer 10

1. Never leave the machine unattended while it is running.
2. Make sure machine is set at the right speed.
3. Never put tools on the bed of the machine.

Question 11

What information should an accident report include?

Answer 11

Time it took place, Place it happened and Who was impacted

Question 12

What is soldering?

Answer 12

The method of joining metals with non-ferrous metals without having to heat them till they metal melt.

Question 13

What temperature should soldering be carried out at?

Answer 13

700 degrees F.

Question 14

Why is it called 50-50 alloy?

Answer 14

Because it’s 50% tin and 50% lead

Question 15

What temperature 50-50 alloy melted at?

Answer 15

215 degree C.

Question 16

What type of solder is best suited for electrical work?

Answer 16

60-40.

Question 17

Before two metals can be joined by soldering several conditions must be met…

Answer 17

The correct solder alloy must be used and the surface to be soldered must be clean.

Question 18

What are THREE types of available solder?

Answer 18

1. Solid wire
2. Acid or resin core wire
3. Bar form

Question 19

Step in procedure for safe edge?

Answer 19

1. Mark out using odd-leg or dividers.
2. Bend over at right angles using folding bars and mallet.
3. Increase the angle of the bend over a hatchet stake.
4. Mallet edge over a piece of waste tinplate.
5. Mallet edge down on stake.

Question 20

What are the steps to complete the dustpan?

Answer 20

1. Layout all horizontal and vertical lines.
2. Cut off waste materials.
3. File edges to dimension.
4. Make bends and folds.
5. Join edges by the brazing process.
6. Give finishing touches.