Which one of the following is the purpose for providing grooves on the Lapping plate ?

To retain lapping paste

To reduce friction

To collect cutting chips

To prevent distortion of the lapping plate

To retain lapping paste

To provide expansion

To reduce friction

To prevent distortion of the adjustable cylindrical lap

Horizontal

Vertical

Reciprocating

Vertical and reciprocating

Aluminium oxide

Silicone carbide

Diamond

Boron carbide

Aluminium oxide

Silicone carbide

Diamond

Boron carbide