Question 1

The device that varies incoming line pressure using centrifugal force is known as:
A) vacuum modulator.
B) reverse boost valve.
C) governor.
D) throttle valve.

Accepted Answer

A governor uses centrifugal force to regulate and vary the incoming line pressure in a transmission system.

Question 2

Tech A says that governor pressure is controlled by torque converter rpm. Tech B says that governor pressure is controlled by output shaft speed. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

Governor pressure in an automatic transmission is controlled by the output shaft speed, not by the torque converter rpm.

Question 3

Tech A says that reciprocating force controls governor pressure. Tech B says that centrifugal force controls governor pressure. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

Centrifugal force controls governor pressure in a governor system, as it is used to regulate the speed of an engine by adjusting the fuel supply.

Question 4

Tech A says that modifying governor weights will alter transmission shifting. Tech B says that excessive modification of the governor weights may cause the transmission to not shift. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

Modifying governor weights can alter transmission shifting, and excessive modification may prevent the transmission from shifting properly.

Question 5

The vacuum modulator converts the engine vacuum signal into:
A) engine pressure.
B) line pressure.
C) governor pressure.
D) modulator pressure.

Accepted Answer

The vacuum modulator converts the engine vacuum signal into modulator pressure, which is used to control the transmission's shift timing and quality.

Question 6

Tech A says that a vacuum modulator converts manifold vacuum into an engine load signal. Tech B says that the manual valve is moved by governor pressure to force a shift. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

The answer of Tech A says that a vacuum modulator...

Question 7

Tech A says that fluid pressure in an automatic transmission is controlled by engine rpm. Tech B says that modulator pressure changes with engine vacuum. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

The answer of Tech A says that fluid pressure in...

Question 8

All of the following statements are true except:
A) Throttle valves are located inside the transmission valve body.
B) As the throttle opening increases, throttle valve pressure decreases.
C) Increased throttle pressure delays the upshift.
D) Decreased throttle pressure allows upshifts.

Accepted Answer

Throttle valve pressure actually increases as the throttle opening increases, not decreases.

Question 9

Harsh-shifting transmission could be caused:
A) when the line pressure is too high during normal cruising speeds.
B) when the line pressure is too low during low cruising speeds.
C) when the line pressure is too high during high cruising speeds.
D) if the line pressure is too low during normal cruising speeds.

Accepted Answer

High line pressure during normal cruising speeds can cause harsh-shifting because it results in excessive force being applied during gear changes.

Question 10

Tech A says that converter and cooler operate at line pressure. Tech B says that line pressure causes the manual valve to move during upshifts and downshifts. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

The answer of Tech A says that converter and cooler...

Question 11

Tech A says that the throttle valve is controlled by a cable or linkage hooked to the engine throttle linkage. Tech B says that a misadjusted throttle valve cable can prevent wideopen throttle on an engine. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

Tech A is correct because traditionally, throttle valves were controlled by a cable or linkage. Tech B is correct because if the throttle valve cable is misadjusted, it can indeed prevent the engine from reaching wide-open throttle.

Question 12

Tech A says that line pressure is reduced during light throttle conditions to improve fuel economy. Tech B says that as the engine speeds up in rpm, the transmission line pressure gradually reduces to maintain clutch pack pressure. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

The answer of Tech A says that line pressure is...

Question 13

Which of the following has multiple lands designed to block or allow line pressure to pass to a band or clutch in order to apply the gear?
A) Kickdown valve
B) Throttle valve
C) Manual valve
D) Shift valve

Accepted Answer

Shift valves have multiple lands that control hydraulic pressure to engage different gears in an automatic transmission.

Question 14

When the manual valve is in park position, the line pressure:
A) is able to flow past the valve to all other components of the transmission.
B) is not exhausted back to the transmission pan.
C) is not able to flow past the valve to any other components of the transmission.
D) increases past the threshold.

Accepted Answer

When the manual valve is in the park position, it blocks the flow of line pressure to other components of the transmission, preventing any movement or engagement of the transmission.

Question 15

All of the following statements with respect to transmission in first gear are correct except:
A) The manual valve moves, allowing line pressure to flow to port A of the 1-2 shift valve.
B) The governor sends fluid pressure to port B.
C) Port B is connected to the clutch or band that applies first gear.
D) Governor pressure increases linearly as vehicle speed increases.

Accepted Answer

The answer of All of the following statements with respect...

Question 16

Tech A says that when governor pressure on one side of a shift valve overcomes spring pressure and throttle pressure on the other side, an upshift occurs. Tech B says when reverse boost pressure on one side of the reverse valve overcomes governor pressure on the other side, a shift into reverse occurs. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

Tech A is correct because an upshift in an automatic transmission occurs when the governor pressure overcomes the combined spring and throttle pressure on the shift valve. Tech B's statement is incorrect because reverse boost pressure does not interact with governor pressure for a shift into reverse.

Question 17

In second gear the line pressure is allowed to flow from:
A) port A to port B.
B) port B to port D.
C) port A to port E.
D)port B to port C.

Accepted Answer

The answer of In second gear the line pressure is...

Question 18

When the governor pressure becomes great enough to overcome the spring pressure and the modulator/throttle valve pressure in the 2-3 shift valve, line pressure is allowed to flow to:
A) port B.
B) port D.
C) port C.
D)port E.

Accepted Answer

The answer of When the governor pressure becomes great enough...

Question 19

More line pressure is needed and governor pressure and modulator pressure/throttle valve pressure are not used in:
A) first gear.
B) second gear.
C) third gear.
D) reverse.

Accepted Answer

In reverse gear, more line pressure is needed to handle the increased load and torque, and governor pressure and modulator/throttle valve pressure are not typically used.

Question 20

Tech A says that in reverse, governor pressure regulates line pressure. Tech B says that in reverse, modulator pressure regulates line pressure. Who is correct?
A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Accepted Answer

In reverse gear, neither governor pressure nor modulator pressure typically regulates line pressure. Line pressure is usually controlled by other means, such as a reverse boost valve or a manual valve in the transmission.

Quiz 10: Hydraulically Controlled Transmission

The device that varies incoming line pressure using centrifugal force is known as:

Tech A says that governor pressure is controlled by torque converter rpm. Tech B says that governor pressure is controlled by output shaft speed. Who is correct?

Tech A says that reciprocating force controls governor pressure. Tech B says that centrifugal force controls governor pressure. Who is correct?

Tech A says that modifying governor weights will alter transmission shifting. Tech B says that excessive modification of the governor weights may cause the transmission to not shift. Who is correct?

The vacuum modulator converts the engine vacuum signal into:

Tech A says that a vacuum modulator converts manifold vacuum into an engine load signal. Tech B says that the manual valve is moved by governor pressure to force a shift. Who is correct?

Tech A says that fluid pressure in an automatic transmission is controlled by engine rpm. Tech B says that modulator pressure changes with engine vacuum. Who is correct?

All of the following statements are true except:

Harsh-shifting transmission could be caused:

Tech A says that converter and cooler operate at line pressure. Tech B says that line pressure causes the manual valve to move during upshifts and downshifts. Who is correct?

Tech A says that the throttle valve is controlled by a cable or linkage hooked to the engine throttle linkage. Tech B says that a misadjusted throttle valve cable can prevent wideopen throttle on an engine. Who is correct?

Tech A says that line pressure is reduced during light throttle conditions to improve fuel economy. Tech B says that as the engine speeds up in rpm, the transmission line pressure gradually reduces to maintain clutch pack pressure. Who is correct?

Which of the following has multiple lands designed to block or allow line pressure to pass to a band or clutch in order to apply the gear?

When the manual valve is in park position, the line pressure:

All of the following statements with respect to transmission in first gear are correct except:

In second gear the line pressure is allowed to flow from:

When the governor pressure becomes great enough to overcome the spring pressure and the modulator/throttle valve pressure in the 2-3 shift valve, line pressure is allowed to flow to:

More line pressure is needed and governor pressure and modulator pressure/throttle valve pressure are not used in:

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