"Two technicians are discussing automatic transmission/transaxle oil pumps. Technician A says that a vane-type pump is a positive displacement pump. Technician B says that the pump is driven by the torque converter. Which technician is correct?"

Technician A is correct.

Explanation:

A vane type pump is a positive displacement pump that transports fluids through its back and forth motion of the vanes.

A rotary vane vacuum pump is a displacement pump that is oil based.

The pumping system consists of

(1), an already installed rotor

(2), vanes that move radially under spring

force

(3) and the inlet and outlet

(4). an oil-sealed outlet valve.

Gas flows into the suction chamber as the rotor turns before the chamber is closed by the second vane. The enclosed gas is compressed until the outlet valve opens against

atmospheric pressure.

A mounted motor helps the rotor move effectively.

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