A gear with teeth machined straight and parallel to the shaft on which they are mounted are known as:

A) spur gear
B) helical gears
C) amboid gears
D) spiral gears

Spur Gear

A type of gear with straight teeth mounted on a parallel shaft, used in machinery to transmit motion and power.

Machined Straight

The process of shaping or finishing a material, usually metal, to create a straight and precise surface using a machine tool.

Teeth

Hard, enamel-covered structures found in the mouth of many animals, including humans, used for biting, chewing, and aiding in digestion.