Pop Quiz

1. Pro-Cut lathes provide a non-directional finish without performing additional swirl sanding.

True

False

The pro-cut provides a non-directional cut, allowing the technician to forgo manually creating the same finish.

Explanation

The pro-cut provides a non-directional cut, allowing the technician to forgo manually creating the same finish.

2. Which is best for washing newly resurfaced rotors?

Glass cleaner

Non-chlorinated brake cleaner

Chlorinated brake cleaner

Soap and warm water

Soap and water is the best way to remove rotor machining, micro-dust from the rotor surface.

Explanation

Soap and water is the best way to remove rotor machining, micro-dust from the rotor surface.

3. Minimum cutting depth per side on a rotor with a Pro-Cut lathe is ______________.

0.001''

0.004''

0.010''

0.020''

The minimum cutting depth is 4/1000''.

Explanation

The minimum cutting depth is 4/1000''.

4. The wheel sensors on an anti-lock braking system relay information to the control unit on:

Vehicle retarding force.

Wheel speed, deceleration, and percentage slip.

Vehicle stopping distance.

Brake application force.

Anti-lock braking systems (ABS) use speed sensor information to monitor wheel speed, deceleration, and percent of slip.

Explanation

Anti-lock braking systems (ABS) use speed sensor information to monitor wheel speed, deceleration, and percent of slip.

5. Maximum cutting depth per side on a Pro-Cut lathe is _____ per side.

0.007''

0.004''

0.010''

0.020''

The maximum cutting depth is 20/1000''.

Explanation

The maximum cutting depth is 20/1000''.

6. Two technicians are discussing a 4-channel ABS system. Technician A says that means the ABS system monitors all four wheels. Technician B says that means the ABS system uses four separate master cylinders. Who is correct?

Technician A only.

Technician B only.

Both Technician A & Technician B

Neither Technician A or Technician B`

In a four-channel ABS system, the hydraulic control unit controls brake pressure to all four wheels.

Explanation

In a four-channel ABS system, the hydraulic control unit controls brake pressure to all four wheels.

7. You should be able to successfully refinish most rotors in _____ cuts.

1

2

3

4

Most rotors should be successfully refinished with 1 cut.

Explanation

Most rotors should be successfully refinished with 1 cut.

8. During an ABS application and the rapid changes in pressure, some systems allow all of the following EXCEPT:

Pulsations to be felt at the brake pedal.

The brake pedal to get spongy.

The brake pedal to creep down a little further.

The brake pedal to rise up slightly.

During an ABS application, the brake pedal can; pulsate, creep down, and if it gets low enough, it can be forced upward. In each position, the pedal should be firm even though it is moving.

Explanation

During an ABS application, the brake pedal can; pulsate, creep down, and if it gets low enough, it can be forced upward. In each position, the pedal should be firm even though it is moving.

9. An ABS braking system controls wheel lock-up by:

Changing pedal mechanical advantage.

Building pressure in the master cylinder reservoir.

Controlling pressure to the locking wheel.

Reducing volume in the master cylinder reservoir.

The module applies and releases the brakes in accordance with the electrical impulses that it receives from the wheel sensor.

Explanation

The module applies and releases the brakes in accordance with the electrical impulses that it receives from the wheel sensor.

10. A vehicle equipped with ABS has a pedal that pulsates only on hard stops. Technician A says that this is normal operation. Technician B says that this could indicate that the brake drums are out of round. Who is correct?

Technician A.

Technician B.

Both Technician A and Technician.

Neither Technician A nor Technician B.

Technician A is correct because as the ABS operates the triggering of the "on-off-on" of the wheel units can be felt through the system at the pedal on hard application. Since the brakes only pulse on hard application, it is not likely an out-of-round drum.

Explanation

Technician A is correct because as the ABS operates the triggering of the "on-off-on" of the wheel units can be felt through the system at the pedal on hard application. Since the brakes only pulse on hard application, it is not likely an out-of-round drum.