Exam 8: Hydraulic Fundamentals

Technician A says that most bands are contracted by releasing fluid pressure from a servo. Technician B says that most bands are contracted by applying fluid pressure to a servo. Who is correct?

Technician A says that an orifice is responsible for controlling the flow of hydraulic fluid between the valve body and the transmission. Technician B says that the orifice is sometimes built into the transmission or even the separator plate. Who is correct?

Which of the following additives prevent the internal parts of the transmission from developing rust and corrosion on metal components?

In some transmissions, what fluid may boost converter pressure so that the torque converter clutch can be applied more firmly under moderate load conditions?

Tech A says that spring tension against a spool valve regulates system pressure. Tech B says that a 50% pulse width modulation means the valve is closed 50% of the time. Who is correct?

The force created by a piston depends:

Which of the following is used to turn the front pump on an automatic transmission?

Technician A says other transmission pressure-regulating valves are similar to the main line pressure regulation valves, except these valves reduce line pressure to create a new pressure that varies with vehicle operation. Technician B says shift valves are spool valves that direct the flow of hydraulic oil to a clutch or band. Which technician is correct?

Technician A says that hydraulic pressure is the same in all directions within a closed container. Technician B says that one benefit of using hydraulic pressure is that it is not affected by leaks in the system. Who is correct?

Technician A says a shift valve is a spool valve with multiple lands. Technician B says moving the shift lever in the cabin causes the manual valve to move and allows line pressure to flow into the appropriate hydraulic circuit. Which tech is correct?

Depth filters may be made of:

Where does the oil supplying the governor valve, throttle valve and other transmission pressure regulating valves come from?

Which of the following hydraulic circuits will usually contain an accumulator to prevent harsh shifts?

Technician A says that a one-way check valve allows fluid to flow in one direction, and stop fluid flow in another. Technician B says that a two-way check valve has one inlet port and two exhaust ports. Who is correct?

What are the larger diameter sections of a spool valve called?

If a vehicle is used for towing or _________, the automatic transmission fluid should be changed more often.

The force created by a piston depends:

Technician A says the spool valve got its name because of its resemblance to the spool that thread or fishing line comes on. Technician B says that with a spool valve, the clearance between the land and the bore must be just great enough to prevent the valve from sticking as it moves back and forth.

Which of the following additives control how temperature affects transmission fluid?

Which of the following oil pressures act together with the calibrated spring on one end of the shift valve, against governor pressure?