The shape of rollers in the roller box turning tool is :

Conical

Convex

Concave

Slight taper with small end towards the face of the job

(a) Plain turning

(b) Facing

Both 'A' and 'B'

Neither 'A' nor 'B'

Manually

Hydraulically

Pneumatically

Any one of the above

Tool post on cross slide

Tool post on the turret head

Rear tool post

None of the above

Four-jaw chuck

Air-operated chuck

Fixture

Collet