5) A hole, which is not made through full depth of the component is known as

Core hole

Blind hole

Pin hole

Bore hole

Answer is:

Blind hole

Explanation:

A hole, which is not made through full depth of the component is known as blind hole.

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:

Explanation:

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

Improper clamping of workpiece

Workpiece having blowholes

Centre punch mark not being large enough to give proper seat to the chisel edge of drill

Any of the above

Answer is:

Kerosene

Water

Air pressures

Lard oil

Answer is:

Explanation:

Kerosene is used as coolants when reaming aluminium work-piece.

5.5 mm

5.8 mm

6.0 mm

6.2 mm

Answer is: