Exam 8: Hydraulic Fundamentals

Technician A says that a spool valve can be positioned manually by springs or by hydraulic pressure. Technician B says that spool valves can have multiple lands with different diameters. Who is correct?

A transmission has no reverse but seems to drive forward fine. Technician A states that the problem could be with the 2-3 shift solenoid. Technician B states that the problem could be with the 1 2 shift solenoid. Who is correct?

The regulator valve uses a simple spring-loaded valve that returns excess fluid back to the transmission's oil pan once the desired pressure is reached.

Technician A says a servo-operated band can only hold a member stationary in an automatic transmission. Technician B says multi-disc clutches can hold or drive individual members of the planetary set in an automatic transmission. Who is correct?

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?

The automatic transmission fluid must be able to transfer heat from the internal components of the transmission to the transmission cooler in order to prevent damaging the internal seals of the transmission.

What is another name for an apply chart?

Tech A says that one type of front pump is a variable displacement pump. Tech B says that the front pump is turned by the torque converter hub. Who is correct?

Which of the following check valve designs allow two different control devices can share the outlet passage.

Which of the following can be caused by low transmission fluid temperature?

Technician A says check valves are classified as one-way and two-way in automatic transmissions. Technician B says two-way check valves are often used in the release circuit for application devices. Who is correct?

Technician A says anti-foam additives help to prevent foaming of the transmission fluid. Technician B says viscosity modifiers cause the transmission fluid to be thick when cold and thin when hot. Who is correct?

Technician A says that in reverse, governor pressure regulates line pressure. Technician B says that in reverse, modulator pressure regulates line pressure. Who is correct?

Automatic transmission accumulators are composed of a spring-loaded piston within a bore.

Technician A says whenever you are removing and installing a transmission, always wear safety glasses. Technician B says transmission fluid, rust, and dirt can fall down from a transmission and cause serious eye injury. Who is correct?

A clutch and band application chart helps to:

Which of the following is not caused by excessive temperature in the transmission fluid?

Which of the following is used in automatic transmissions to apply and release different clutches and brakes?

Technician A says typically when the pump pressure acting on the spool valve becomes greater than the spring pressure, the regulator spool valve moves slightly, opening an exhaust port, and excess fluid pressure is exhausted back to the transmission pan. Technician B says typically when the pump pressure acting on the regulator spool valve becomes greater than the spring pressure, the spool valve moves slightly, opening an exhaust port, and excess fluid pressure is exhausted back to the torque converter. Who is correct?

Technician A says placing an accumulator in the hydraulic circuit can allow clutches to apply much more progressively. Technician B says placing an accumulator in the hydraulic circuit can allow a band to apply much more progressively. Who is correct?