Exam 8: Hydraulic Fundamentals

What is the smallest size of particles that depth filters can remove from transmission fluid?

Which of the following is an additive found in automatic transmission fluids?

Technician A say orifices are often used in conjunction with spool valves to restrict fluid for timing purposes or to prevent valve fluctuations. Technician B says accumulators are used to dampen the application of clutches and bands. Which technician is correct?

Which of the following is a simple mechanism that uses a spring and a spool valve to dump excess fluid back to the transmission pan.

Accumulators in an automatic transmission are being discussed. Technician A says that an accumulator helps progressively apply a clutch or band, eliminating a harsh shift. Technician B says that an accumulator has a piston installed in a bore with a spring, and a gradual increase of fluid pressure is applied against the spring, preventing driveline stress. Who is correct?

Which of the following materials are automatic transmission front pump housing made from?

To which of the following should a technician compare transmission operation during a test drive in order to help isolate the transmission concern?

Which of these valves is directly connected to the gearshift mechanism in the vehicle?

Technician A says that external transmission filters are more common than internal transmission filters. Technician B says that if the transmission pan is removed, the magnet must be replaced. Who is correct?

Technician A says that accumulators are used to filter contaminates. Technician B says that accumulators are used to soften clutch engagement. Who is correct?

Which of the following are used to dampen the application of clutches and bands by increasing the circuit volume during the shift?

Which type of filter is often a simple fine-mesh screen made out of metal or plastic?

Technician A says anti-foam additives help to prevent loss of lubrication due to aeration of the transmission fluid. Technician B says viscosity modifiers used in transmission fluid are different than viscosity modifiers used in engine oils. Who is correct?

Tech A says that park is obtained by mechanically locking one band and one clutch together. Tech B says that spool valves tend to be self-cleaning. Who is correct?

Technician A says that measuring line pressure and comparing it to specifications is a good diagnostic procedure. Technician B says that the manual valve is moved by governor pressure to force a shift. Who is correct?

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

Technician A says that a variable displacement vane pump is similar to a vane pump, but uses a spring-loaded moveable pump housing that pivots to change pumping chamber volume. Technician B says that a variable displacement pump is used to increase vehicle fuel mileage. Who is correct?

Which of the following are used to dampen the application of clutches and bands by increasing the circuit volume during the shift?

Technician A says that a check ball should be replaced during a rebuild. Technician B says that the area a check ball is located should be inspected for damage. Who is correct?

After leaving the automatic transmission's cooler, the transmission fluid is ready to enter the transmission lubrication circuit. Which parts are typically lubricated by this circuit?