Technician A says that when the external teeth of two gears are in mesh they rotate in the same direction. Technician B says that when two gears, one with internal teeth and other with external teeth, are in mesh, they rotate in the same direction. Which technician is correct?

Two technicians are discussing helical gears. Technician A says the teeth on a helical gear are straight-cut. Technician B says the contact of the gear tooth starts at the tip and rolls down the tooth.

Two technicians are discussing automatic transmissions. Technician A says planetary gear sets must always mesh. Technician B says planetary gear sets should have gear lash. Which technician is correct?

Technician A says the bevel gears are typically mounted at 360 degree angles to one another. Technician B says bevel gears are mounted at 90 degree angles. Which technician is correct?

___________ occurs when two gears of equal size turn without changing torque or speed.

Technician A says that there are three types of rear axle ring and pinion gearsets: spiral bevel, hypoid, and amboid. Technician B says gears can be named for their tooth cut type. Which technician is correct?