Which one of the following thread groups is only for transmitting motion ?

Square, Modified square, Acme, Buttress threads

Whitworth, Acme, Square, Buttress threads

Unified, Acme, Square threads

ISO Metric, Modified square, Acme threads

Transmission of motion

Resisting force exerted in one direction only

Positioning of mechanical parts

Special bolts and units in structural work

Lead screw

Hand wheel

Feed rod

Gear train on a rack

0.6495 P

0.6000 P

0.6403 P

0.6134 P

Setting the correct speed

Setting on cut for the full depth of the thread

Making a series of cuts in the same cut

Moving the carriage by means of rack