27) 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

Answer is:

Square, Modified square, Acme, Buttress threads

Explanation:

Square, Modified square, Acme and Buttress thread groups are only for transmitting motion

Transmission of motion

Resisting force exerted in one direction only

Positioning of mechanical parts

Special bolts and nuts in structural work

Answer is:

Explanation:

Buttress threads are most commonly used for resisting force exerted in one direction only

Lead screw

Hand wheel

Feed rod

Gear train on a rack

Answer is:

Explanation:

While threading on a lathe, the carriage is moved by means of Lead screw

0.6495 P

0.6000 P

0.6403 P

0.6134 P

Answer is:

Setting the correct speed

Setting one cut for full depth of the thread

Making a series of cuts in the same cut

Moving the carriage by means of rack

Answer is:

Explanation:

Threads are cut on a lathe with a single point tool by making a series of cuts in the same cut.