Deck 128: Hydraulic Components and Control Systems

Question 1

Two technicians are discussing one-way clutches. Technician A says that a sprag and a roller are two types of one-way clutches. Technician B says that a one-way clutch could be installed upside down and cause the automatic transmission/transaxle to not function correctly. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Answer 1

Both technicians A and B

Question 2

Two technicians are discussing automatic transmission/transaxle oil pumps. Technician A says that aVane-type pump is a positive displacement pump. Technician B says that the pump is driven by the torque converter. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Answer 2

Both technicians A and B

Question 3

What part controls mainline pressure in an electronically shifted automatic transmission?

A)Boost valve
B)Spool valve
C)Modulator valve
D)Pressure control solenoid (force motor)

Answer 3

Pressure control solenoid (force motor)

Question 4

Technician A says that the automatic transmission/transaxle fluid (ATF) cooler is designed to cool the automatic transmission fluid. Technician B says that the cooler also warms the ATF when the fluid is cold. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 5

Technician A says that the mainline pressure is usually higher in manual first or manual second gear than it is when the gear selector is in the drive position. Technician B says that mainline pressure is higher in reverse than when the gear selector is in the drive position. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 6

What is the part of the planetary gearset called that is being held by a band?

A)Reaction member
B)Held member
C)Simple gearset
D)Compound gearset

Question 7

What is the purpose and function of an accumulator?

A)To apply a clutch
B)To apply a band
C)To cushion or dampen pressure surges
D)Either A or B

Question 8

The steel plates in a clutch pack are commonly called ________.

A)Steels
B)Reaction members
C)Friction disks
D)Friction members

Question 9

Force motors are controlled by the computer by ________.

A)PWM
B)Increasing/ decreasing current
C)Changing resistance to the circuit
D)Increasing/ decreasing voltage

Question 10

Check balls used in the valve body are constructed of ________.

A)Nylon
B)Steel
C)Rubber
D)All of these

Question 11

The major types of oil pumps used in an automatic transmission are

A)Gear, vane, and gerotor.
B)Gear, pressure, and rotor.
C)Gear, crescent, and vane.
D)Gear, crescent, and rotor.

Question 12

Technician A says shift solenoids are used on some transmissions to control upshifts and downshifts.Technician B says governor pressure is used on some transmissions to control upshifts and downshifts. Who is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 13

Which valve is controlled by the position of the gearshift selector?

A)Pressure control
B)Detent
C)Manual
D)None of these are correct.

Question 14

Technician A says that the transmission hydraulic pump operates only when the vehicle is in motion.Technician B says that the transmission hydraulic pump operates when the engine is running. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 15

Technician A says that hydraulic pressure affects transmission shift points. Technician B says that hydraulic pressure affects the feel of transmission shifts. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 16

Technician A says that most pressure regulating valves work by balancing hydraulic pressure against a spring force. Technician B says that electronic transmissions use solenoids to further regulate hydraulic pressure. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 17

Technician A says most transmission hydraulic valves are spool valves. Technician B says the recessed areas of a spool valve are called grooves. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 18

Which of these is the most current version of GM's Dexron ATF?

A)Dexron V
B)Dexron VI
C)Dexron VII
D)Dexron III

Question 19

Technician A says ATF is used to cool, clean, and lubricate an automatic transmission. Technician B says ATF is used to operate the shift valves, and transmit engine torque. Who is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 20

Technician A says electronic transmissions control shifts by directing the shift solenoid output pressure to the bands and clutches. Technician B says electronic transmissions control shifts by directing the shift solenoid output pressure to the shift valves. Who is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 21

A TFT sensor is a ________.

A)voltage generator
B)thermistor
C)switch
D)potentiometer

Question 22

Late model vehicles use ________ to change gear ratios in the automatic transmission.

A)Spinning weights
B)Solenoids
C)Cables and springs
D)Garage shifters