26) If the cross-feed screw has a pitch of 40 mm and the pawl is set to pass two teeth of a 50-tooth ratchet, the cross-feed per stroke will be

0.8 mm

1.2 mm

1.3 mm

1.4 mm

Answer is:

1.4 mm

For changing the direction of feed, pawl is to be rotated 180 Degree.

When shaping 'T' slot, the function of clapper box is not used.

Pawl mechanism of a shaper is a unit, which regulates the speed of rpm.

When cutting 'T' slots in a shaper, clapper block need not to be lifted.

Answer is:

lift the tool during cutting stroke

lift the tool during return stroke

lift the tool in the middle of the stroke

avoid overhanging of tool

Answer is:

Base

Ram

Saddle

Clapper box

Answer is:

'V' block

Angle plate

Parallel blocks

Round rods

Answer is: