20) The drill sleeves or sockets are available with Morse taper and their number range MT-1 to MT-6. Which one of the following drill sizes refers to MT-4 ?

Drills above 14 mm up to 23 mm

Drills above 23 mm up to 31.75 mm

Drills above 31.75 mm up to 50.50 mm

Drills above 50.50 mm up to 76 mm

Answer is:

Drills above 31.75 mm up to 50.50 mm

Explanation:

For Morse Taper MT-4 the range starts from 31.7 mm and till 50.50 mm (Approx).

Scraper

Chisel

Hacksaw

Reamer

Answer is:

The kind of cut and spacing of teeth

Arrangement of teeth on the file

Size and shape of the file

All of the above

Answer is:

Explanation:

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.

High speed and pressure

Pressures not released during return stroke

Coolant not used

Any one of the above

Answer is:

To increase the friction between the file face and the job surface.

To give better distortion of the pressure and to compensate slight filing movement.

To reduce the friction between the file face and the job surface.

To reduce the effort in driving a file.

Answer is: