Engineering :: Production Engineering

@ : Home > Mechanical Engineering > Production Engineering

761.

Chip breaker is

A.	an obstruction attached to face of the tool	B.	a hammer used to break the chips
C.	a coolant forced under pressure on the chip	D.	None of the above

762.

A crater is a pit formed on

A.	flank of tool	B.	face of tool
C.	surface of work piece	D.	None of the above

763.

Greater proportion of heat in a cutting operation is produced in the region of

A.	tool-chip interface	B.	shearing plane of chip
C.	tool and work piece contact	D.	None of the above

764.

Lead and sulphur when added to low carbon steel promote

A.	chip breaking	B.	continuous chip formation
C.	continuous chip with built up edges	D.	None of the above

765.

A cutting tool fails due to

A.	crater formation	B.	crater wear and flank wear
C.	crater wear and flank wear meeting to cause crumbling of cutting edge

766.

The tool may fail suddenly because of

A.	crater wear	B.	flank wear
C.	both crater and flank wear	D.	spalling

767.

A tool is said to have worn if

A.	it produces discontinuous chips	B.	its cutting angles have changed
C.	heat produced in cutting is large	D.	None of the above

768.

Choose the incorrect statement. The mechanism of tool wear is

A.	oxidation	B.	reduction
C.	diffusion	D.	None of the above

769.

Toole life cannot be defined as

A.	number of minutes after which tool failed	B.	machine time in minutes for which tool performed satisfactorily
C.	average length of cut per cutting edge	D.	None of the above

770.

An ideal tool material is the one which

A.	has very long life	B.	has same life at all cutting speeds
C.	produces no heat during cutting	D.	None of the above