Scraper
Scrapers are used to correct slight errors on all flat or curved surfaces that must be finished more decoratively.
Scraping is used to produce a high degree of fit between two flat or two curved surfaces particularly where the surfaces can rub together in use.
All of the above
The cutting action of the file tool depends on type of cut and spacing of teeth, arrangement of teeth on the file, size and shape of the file.
Any one of the above
Following are the reasons for hacksaw blade teeth to get dull
1. High speed and pressure
2. Pressure not released during return stroke
3. Coolant not used
To increase the friction between the file face and the job surface.
Any of the above
A drilled hole goes out of centre due to
Improper clamping of workpiece
Workpiece having blowholes
Centre punch mark not being large enough to give proper seat to the chisel edge of drill