Question 1

The button on the ________ valve should be held when pressure bleeding the brakes.

Accepted Answer

A)  Metering
B)  Pressure-differential
C)  Residual check
D)  Proportioning A

Question 2

Technician A says that the height-sensing proportioning valve changes its split point by means of a rotating cam. Technician B says that levers are used in conjunction with the height-sensing proportioning valve. Which technician is correct?

Accepted Answer

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

Question 3

Dual braking systems sometimes use a fluid level switch in place of a pressure differential switch.

Accepted Answer

A) True 
 B)False  True

Question 4

Residual check valves ________.

Accepted Answer

A)  Are used only on antilock braking systems
B)  Do NOT keep air out of the brake lines
C)  May be located under the tubing seat
D)  Are required on systems with cup expanders in their wheel cylinders

Question 5

When the brakes are applied lightly at low speeds on slippery pavement, which type of valve keeps the front brakes from locking?

Accepted Answer

A)  Metering valve
B)  Proportioning valve
C)  Residual pressure check valve
D)  Purge valve

Question 6

Technician A says installation of aftermarket air shocks may cause height-sensitive proportioning valves to function improperly. Technician B says vehicles equipped with ABS systems using electronic brake proportioning (EBP) do not need proportioning valves. Which technician is correct?

Accepted Answer

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

Question 7

A typical brake light switch is electrically ________.

Accepted Answer

A)  Normally closed
B)  Normally open

Question 8

Identify the valve shown (arrow).

Accepted Answer

A)  Proportioning valve
B)  Take-up valve
C)  Residual check valve
D)  Metering valve

Question 9

Two technicians are discussing the metering valve in a front-disc, rear-drum braking system. Technician A says that the metering valve delays application of the front brakes. Technician B says that the metering valve delays the application of the rear brakes. Which technician is correct?

Accepted Answer

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

Question 10

The ratio of front to rear hydraulic system pressure supplied to the rear brakes by the proportioning valve is called ________.

Accepted Answer

A)  Split point
B)  Pressure limit
C)  Slope
D)  Limit point

Question 11

A residual check valve is used to ________.

Accepted Answer

A)  Prevent rear wheel lockup during hard braking
B)  Speed brake release to reduce brake wear
C)  Prevent front wheel lockup during hard braking
D)  Maintain a slight pressure on the hydraulic system

Question 12

Technician A says a pull to the right during braking could be caused by a defective metering valve.Technician B says a pull to the left could be caused by a defective proportioning valve. Which technician is correct?

Accepted Answer

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

Question 13

One type of fluid level switch uses a magnet and reed switch.

Accepted Answer

A) True 
 B)False

Question 14

The rear brakes lock up during a regular brake application. Technician A says the metering valve could be the cause. Technician B says that stuck front disc brake calipers could be the cause. Which technician is correct?

Accepted Answer

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 some proportioning valves are one part and used to control both rear brakes.Technician B says that some proportioning valves are two parts; one for each rear wheel. Which technician is correct?

Accepted Answer

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 the red brake warning light can be turned on if a difference in pressure is detected by the pressure differential switch. Technician B says that the red brake warning light can be turned on if the brake fluid level sensor detected low brake fluid level. Which technician is correct?

Accepted Answer

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

Question 17

A visual inspection of the metering valve includes ________.

Accepted Answer

A)  Inspection for excessive leakage
B)  Verifying that the valve stem moves when the brakes are applied
C)  Both A and B
D)  Neither A nor B

Question 18

A combination valve could include ________.

Accepted Answer

A)  Proportioning and pressure-differential valves
B)  Proportioning, metering, and pressure-differential valves
C)  Metering and proportioning valves
D)  Any of the above depending on the make and model of the vehicle

Question 19

When the brakes are applied in a panic situation, the rear brakes have a tendency to skid. The most likely cause is ________.

Accepted Answer

A)  Quick take-up valve in the master cylinder
B)  Compensation port clogged in the master cylinder
C)  Metering valve is faulty
D)  Proportioning valve is faulty

Question 20

The rear wheels lock up during hard braking. Technician A says that a defective metering valve could be the cause. Technician B says that a defective proportioning valve could be the cause. Which technician is correct?

Accepted Answer

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

Exam 95: Hydraulic Valves and Switches

The button on the ________ valve should be held when pressure bleeding the brakes.

Technician A says that the height-sensing proportioning valve changes its split point by means of a rotating cam. Technician B says that levers are used in conjunction with the height-sensing proportioning valve. Which technician is correct?

Dual braking systems sometimes use a fluid level switch in place of a pressure differential switch.

Residual check valves ________.

When the brakes are applied lightly at low speeds on slippery pavement, which type of valve keeps the front brakes from locking?

Technician A says installation of aftermarket air shocks may cause height-sensitive proportioning valves to function improperly. Technician B says vehicles equipped with ABS systems using electronic brake proportioning (EBP) do not need proportioning valves. Which technician is correct?

A typical brake light switch is electrically ________.

Identify the valve shown (arrow) .

Two technicians are discussing the metering valve in a front-disc, rear-drum braking system. Technician A says that the metering valve delays application of the front brakes. Technician B says that the metering valve delays the application of the rear brakes. Which technician is correct?

The ratio of front to rear hydraulic system pressure supplied to the rear brakes by the proportioning valve is called ________.

A residual check valve is used to ________.

Technician A says a pull to the right during braking could be caused by a defective metering valve.Technician B says a pull to the left could be caused by a defective proportioning valve. Which technician is correct?

One type of fluid level switch uses a magnet and reed switch.

The rear brakes lock up during a regular brake application. Technician A says the metering valve could be the cause. Technician B says that stuck front disc brake calipers could be the cause. Which technician is correct?

Technician A says that some proportioning valves are one part and used to control both rear brakes.Technician B says that some proportioning valves are two parts; one for each rear wheel. Which technician is correct?

A visual inspection of the metering valve includes ________.

A combination valve could include ________.

When the brakes are applied in a panic situation, the rear brakes have a tendency to skid. The most likely cause is ________.

The rear wheels lock up during hard braking. Technician A says that a defective metering valve could be the cause. Technician B says that a defective proportioning valve could be the cause. Which technician is correct?