Technician A says that if the sun gear is driven while the ring gear is held, the planet gears will walk around the inside of the ring gear. Technician B says that if the sun gear is driven while the carrier is held, the ring gear is forced to rotate at a slower speed than the sun gear. Which technician is correct?

A large amount of oxygen in the exhaust system causes the O2S (Oxygen sensor) to produce which of these?

A) Low voltage B) High voltage C) Abnormal readings D) False readings

Two technicians are discussing U-joints. Technician A says that a defective U-joint could cause a loud clunk when the transmission is shifted between Drive and Reverse. Technician B says a worn U-joint can cause a clicking sound when driving the vehicle in reverse. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B

The largest-capacity chillers use:

A) Reciprocating compressors. B) Scroll compressors. C) Rotary compressors. D) Centrifugal compressors.

When there is an elbow in fiberglass duct, a hanger must be placed within _____

a. 12 inches of the elbow throat b. 12 inches of the connection to the straight duct c. 18 inches of the elbow throat d. 18 inches of the connection to the straight duct