12927 - Identify, select, use and maintain hand tools used for BCATS projects

During the process of sharpening a chisel on the grindstone, the edge turns a blue colour.
What has caused this?
1. Overheating of the steel.
2. Blue indicates cold.
3. This is normal and can be ignored.
4. A little bit does not make a difference.
During the process of sharpening a chisel on the grindstone, the edge turns a blue colour.
What will be the effect on the tool?
1. The edge looses its hardness (temper)
2. No effect. Ignore it.
3. It looks prettier in blue.
4. The edge will get harder.
During the process of sharpening a chisel on the grindstone, the edge turns a blue colour. How could this have been prevented?
1. Using a slower stone, appropriate coolant and sharpening in short bursts.
2. By pushing harder to make the stone cool the steel.
3. It can't be prevented.
4. Leave the blade in contact with the stone for longer periods. Time cools steel the fastest.
Do chisels need to be reground every time they become blunt?
1. Yes
2. No
3. Only if there are chips in the blade.
What is the correct grinding angle for a plane or chisel blade?
1. 20 to 25
2. 25 to 30
3. 30 to 35
4. 15 to 20
What is the correct honing angle for a plane or chisel blade?
1. 25 to 30 degrees
2. 30 to 35 degrees
3. 20 to 25 degrees
4. 15 to 20 degrees

12927 - Identify, select, use and maintain hand tools used for BCATS projects - Activity 7