Deck 7: Hydraulic and Electronic Controls

Question 1

The manual valve is operated by the gear selector linkage.

Answer 1

True

Question 2

Relief valves are used to control maximum pressures in a hydraulic circuit.

Answer 2

True

Question 3

​While discussing some control modules: Technician A says some transmissions have a single assembly that contains all of the solenoids, the TCM, and a lead frame assembly. Technician B says the lead frame connects to the individual components, therefore fewer electrical connections are needed for these transmissions, eliminating many potential problems. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Answer 3

C

Question 4

Technician A says to use a die grinder and a fine abrasive pad to polish the surface of a valve. Technician B says to use a fine emery cloth when removing a scratch from a valve. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 5

Technician A says spool valves are normally used as relief valves. Technician B says the most common type of valve used in automatic transmissions is the spool valve. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 6

Technician A says hydraulic forces control the movement of a spool valve. Technician B says mechanical forces control the movement of the spool valve. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 7

Which of the following is not true of mainline pressure?

A)It varies with vehicle speed.
B)It fills the torque converter.
C)It supplies fluid to the valve body.
D)None of the above.

Question 8

A 100-grit sandpaper soaked in ATF is ideal for cleaning bores within the valve body.

Question 9

A liquid under pressure may change from a liquid to a gas in response to temperature changes.

Question 10

The most commonly used sensor to monitor engine load is a MAP sensor.

Question 11

Liquids are always compressible.

Question 12

Spool valves are sometimes used as a fluid pressure control device.

Question 13

Technician A says a check valve will stop fluid flow in one direction but will allow it to flow in the opposite direction. Technician B says a simple check valve can be used to block a hydraulic passageway in one direction. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 14

​Technician A says a scratched separator plate must be replaced. Technician B says make sure all drain back openings in the spacer plate are clear. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 15

A control valve is used as a flow-directing valve.

Question 16

Orifices are used to regulate and/or control fluid pressures.

Question 17

The valve body's only job is to direct fluid flow.

Question 18

​Technician A says never use a magnet to remove the check balls. Technician B says be sure to do something that will help you remember where the balls were, such as photographing or drawing their location. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 19

Technician A says when wiping down valves, the rag must be lint free. Technician B says before reassembling the valve body, all parts should be soaked in mineral spirits. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 20

A hydraulic operated piston assembly is known as a servo.

Question 21

Technician A says mainline pressure is the source of all pressures in a transmission or transaxle. Technician B says mainline pressure is used to apply clutches and bands. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 22

Which of the following is not a type of valve used in the valve body?

A)Poppet valve
B)Spool valve
C)Check ball valve
D)Stator valve

Question 23

Technician A says throttle pressure is controlled directly by the pressure regulator valve. Technician B says one of the primary purposes of the pressure regulator valve is to fill the torque converter with fluid. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 24

Technician A says the oil pan bolts must be discarded after removing the pan from Ford fusion-based FWD vehicles. Technician B says when replacing the pan on this type of vehicle, a thin application of sealer must be used to ensure no leaks occur. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 25

When inspecting valves from the valve body: Technician A says the edges of the spools should be damage-free but should not be sharp. Technician B says to identify a bent valve, install it into its bore and rotate it. If it binds or drags while it is being rotated, it is bent. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 26

Technician A says engine load can be monitored electronically through the various electronic sensors that send information to a TCM. Technician B says the most commonly used load sensor is a VSS. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 27

​Technician A says that a relief valve exhausts fluid flow when a particular pressure is reached. Technician B says that a relief valve prevents pressures from going too low. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 28

Which of the following accomplishes the distribution of pressurized fluid to the appropriate reaction member?

A)Screen filter
B)Check valve
C)Valve body
D)Oil pump

Question 29

Technician A says valve bodies are disassembled in the same way for most transmissions and transaxles. Technician B says to read the service manual for the proper procedure before disassembling a valve body. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 30

​Technician A says a transmission orifice is a bore in a passage that is larger than the connecting passages. Technician B says an orifice is used to dampen a fluid flow to prevent sudden or undue movement of a control valve. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 31

Technician A says on some Chrysler transaxles the solenoid/pressure switch is a single unit that consists of various solenoids and pressure switches. Technician B says on some General motors transmissions the fluid pressure switch assembly contains five different pressure switches and is connected to five different hydraulic circuits. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 32

​The spool valve's movement is controlled by:

A)​Hydraulic pressure
B)​Spring pressure
C)​Mechanical linkage
D)​All of the above

Question 33

Technician A says a pressure test can verify problems with valves inside the valve body. Technician B says the valve body on most transmissions can be serviced while the transmission is still in the vehicle. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 34

Technician A says to flat file the surface of a warped valve body, to allow it to seal properly helping to prevent unwanted, partial engagement of a clutch or band. Technician B says valves sticking in their bore may be the result of overtorquing the hold-down bolts of the valve body. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 35

Technician A says when assembling parts of a transmission, especially a valve body, to always use new gaskets and seals and to lubricate each part with clean ATF. Technician B says to increase the applied torque by 15 percent when reusing bolts and other fasteners. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 36

​While discussing shift pressure control valves: Technician A says that these valves can apply different pressures to a clutch pack depending on the commands from the TCM. Technician B says that modern transmissions do not use shift pressure control valves.. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 37

Technician A says that the pressure switches used in automatic transmissions measure the pressure and send the information to the TCM. Technician B says that the pressure switches only indicate if pressure is present; they do not indicate the exact measurement of pressure. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 38

​While discussing boost pressures: Technician A says during certain operating conditions, mainline pressure must be boosted. Technician B says increased pressure is needed to hold brakes and clutches more tightly, such as in reverse or high load conditions. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 39

​Technician A says valve body springs are distorted if they roll straight on the workbench when removed from the valve body instead of wobbling. Technician B says problems rarely result from excessive clearance between the valve and its bore. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 40

Which of the following is true of a vehicle speed sensor?

A)It generates an AC signal.
B)It uses a permanent magnet.
C)It senses output shaft speed.
D)All are correct

Question 41

A(n)____________________ allows fluid to flow until a particular pressure is reached.

Question 42

The ____________________ contains five different pressure switches and is connected to five different hydraulic circuits.

Question 43

​_______________ valves are normally used as flow- directing valves. They are the most commonly used type of valve in an automatic transmission.

Question 44

A(n)____________________ valve is normally a flat disc with a stem that can be used to prevent backflow.

Question 45

Shift timing and quality should vary with engine _______________, as well as with vehicle _______________.​

Question 46

The ____________________ moves the manual valve.

Question 47

A(n)____________________ is a hole that regulates and controls fluid pressure.

Question 48

A(n)____________________ valve changes the pressure of the oil to control shift points.

Question 49

A(n)____________________ valve uses spring pressure; when fluid pressure builds to a certain point the valve will open.

Question 50

A(n)____________________ is a spool valve with several spools, lands, and reaction areas.

Question 51

The ____________________ valve moves to change gears in a transmission or transaxle.

Question 52

A(n)____________________ is a ball-type valve without a return spring.

Question 53

​Technician A says a simple check valve is used to block a hydraulic passageway. Technician B says it normally stops fluid flow in both directions. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 54

The ____________________ is the area between the spools.

Question 55

​ Shift pressure control solenoids can be used to compensate for  ____________  ________ ________.

Question 56

A(n)____________________ is a schematic that shows the fluid path and valves.

Question 57

The ____________________ is the part of a spool valve that the fluid pushes against.

Question 58

The TCM compares the desired _______________ pressure with that measured by the _______________ pressure sensor and adjusts the duty cycle of the solenoid accordingly.

Question 59

A(n)____________________ is a flow-directing valve.

Question 60

​ The TCM uses the___________ _________  and the ___________ _________ _________ to  sense engine load.

Question 61

Describe boost pressure.

Question 62

Explain the function of shift valves.

Question 63

Briefly explain a basic hydraulic circuit and its operation as it applies to an automatic transmission.

Question 64

Explain how to check a spool valve for proper fit in its respective bore.

Question 65

​ A valve body assembly can be composed of three main parts. What are they?

Question 66

Describe how a spool valve is used in the transmission.

Question 67

Define a flow-directing device.

Question 68

What is an oil circuit?

Question 69

On electronically controlled transmissions and transaxles, what is used instead of a governor?

Question 70

Define an orifice and its function.

Question 71

​A check valve fitted with a calibrated spring designed to prevent the valve from opening until a specific pressure is reached is called a _______________ _______________ valve.

Question 72

Explain three primary functions of the pressure regulator valve.

Question 73

Describe three ways to polish a spool valve.

Question 74

​ Describe how fluid flow and pressure can be controlled by a solenoid.