To check right angle

To check acute angle

To check obtuse angle

To check straight angle

White wash

Prussian blue

Copper sulphate

Cellulose lacquer

Snug

Guide pin

Rocker arm

Fine adjustment screw

stretching of blade

wrong pitch of the blade

improper selection of saw sets

nut thread being worn out

Hand force is too big

Cutting section is too short

Coarse blade to be used

Hand force acts only upon few teeth