49) Inserted HSS tool bits are more useful for the operation

Boring

External threading

Internal threading

All the above

Answer is:

All the above

Explanation:

Inserted HSS tool are more useful for the operation's like, boring, external threading & Internal threading.

Long curly chips

Segmental chips

I-shaped chips

Spiral chips

Answer is:

Explanation:

While turning cast iron discontinuous chip or segmental chips found.

It holds the job

Drills and reamers can be mounted on it

Dead centre is mounted on its spindle

It can be used for taper turning by offset method

Answer is:

Flame hardened

Case hardened

Normalised

Tempered

Answer is:

small diameter step

large diameter step

either 'A' or 'B'

neither 'A' nor 'B'

Answer is: