It is heavy

It is a bad conductor of heat

It's thermal expansion is more

It is good conductor of heat

Put water on it

Use sand or clay

Use C.T.C extinguisher

Use dry chemical powder

Doing work in ancient way

Doing work in one's own way

Observing safety rules related to job, machine and workplace

Using safety equipment

Putting water on it

Foam extinguisher

Soda acid extinguisher

None of these

Pre-heat the solder

Clean the bit thoroughly

Change the soldering bit shape

Rub the bit over solder for longer period