Question 1

Pressurized fluid enters the accumulator, pushing the piston and compressing the accumulator spring. Once the piston is seated against the bottom of the accumulator bore, the clutch or brake being applied receives full line pressure.

Accepted Answer

The description accurately explains the operation of a hydraulic accumulator in a clutch or brake system, where pressurized fluid compresses a spring, allowing full line pressure to be applied once the piston is seated.

Question 2

Technician A says accumulators are devices that cushion and absorb application pressure within the transmission. Technician B says accumulators are composed of a spring-loaded piston within a bore. Who is correct?

Accepted Answer

Accumulators in a transmission do both cushion and absorb application pressure, as Technician A states, and they are composed of a spring-loaded piston within a bore, as Technician B describes.

Question 3

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?

Accepted Answer

Both Technician A and Technician B are correct. An accumulator in a hydraulic circuit can help both clutches and bands to apply more progressively by absorbing and releasing hydraulic pressure smoothly.

Question 4

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?

Accepted Answer

Both technicians are correct. Accumulators in automatic transmissions help smooth out the application of clutches or bands by using a piston and spring mechanism to gradually increase fluid pressure, reducing harsh shifts and driveline stress.

Question 5

Technician A says that an orifice is a restriction. Technician B says that orifices are used to slow down clutch engagement. Who is correct?

Accepted Answer

An orifice is indeed a restriction, as Technician A states, and it is used to slow down clutch engagement, as Technician B states. Both technicians are correct.

Question 6

Which of the following devices delay an apply by restricting the flow of oil in a hydraulic circuit?

Accepted Answer

Orifices restrict the flow of oil in a hydraulic circuit, causing a delay in the application by controlling the rate at which the fluid can pass through.

Question 7

Transmission orifices are never used in the passage feeding oil pressure to a clutch or band.

Accepted Answer

Transmission orifices are often used in the passage feeding oil pressure to a clutch or band to control the flow rate and ensure smooth engagement.

Question 8

The delay provided by a flow control orifice enables the engineers to control the amount of time it takes to apply a given device.

Accepted Answer

A flow control orifice regulates the flow rate of a fluid, which can be used to control the timing of operations in hydraulic or pneumatic systems.

Question 9

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?

Accepted Answer

Orifices are indeed used with spool valves to control fluid flow for timing and stability, and accumulators are used to smooth out the application of clutches and bands by storing and releasing hydraulic energy.

Question 10

Technician A says precisely sized orifices can be used to control fluid flow in hydraulic circuits. Technician B says an orifice provides no restriction in line with the device being applied. Who is correct?

Accepted Answer

Technician A is correct because precisely sized orifices are indeed used to control fluid flow in hydraulic circuits by providing a specific restriction. Technician B is incorrect because an orifice inherently provides a restriction to fluid flow.

Question 11

Technician A says experienced transmission rebuilders never increase the size of the clutch and band application orifices. Technician B says experienced transmission rebuilders may install different accumulator springs or longer accumulator pistons to produce a firmer, quicker shift. Who is correct?

Accepted Answer

Technician B is correct because experienced rebuilders may modify accumulator springs or pistons to adjust shift firmness and timing.

Question 12

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 spool valves and one way clutches. Who is correct?

Accepted Answer

The answer of Technician A say orifices are often used...

Question 13

A(n) __________ is a precision hole, used in conjunction with check balls to restrict fluid flow.

Accepted Answer

An orifice is a precision hole used to control or restrict fluid flow in hydraulic or pneumatic systems.

Question 14

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?

Accepted Answer

Both technicians are correct. An orifice does control the flow of hydraulic fluid, and it can be built into the transmission or the separator plate.

Question 15

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

Accepted Answer

The answer of Which of the following check valve designs...

Question 16

Two-way check valves commonly use a check ball design.

Accepted Answer

Two-way check valves use a check ball design to allow flow in both directions while preventing backflow.

Question 17

Automatic transmission check valves always use a spring to keep the check ball in place.

Accepted Answer

Not all automatic transmission check valves use a spring; some rely on fluid pressure or gravity to position the check ball.

Question 18

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?

Accepted Answer

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

Question 19

Technician A says check valves can be used to regulate maximum pressures within in automatic transmissions. Technician B says one-way check valves are often used in the release circuit for application devices. Who is correct?

Accepted Answer

Both A and B are correct because check valves can be used to regulate maximum pressures within automatic transmissions and one-way check valves are often used in the release circuit for application devices.

Question 20

A __________ can be one of two different types: one-way or two-way.

Accepted Answer

A check valve can be one-way or two-way, as it allows fluid to flow in one direction and prevents backflow, which can be considered as two-way in terms of functionality.

Quiz 8: Hydraulic Fundamentals