Hydraulic Brake System Diagnosis and Service 190103c Flashcards
- List two (2) Alberta Government acts, regulations or programs relating to vehicle
safety.
a) Motor Transport Act
b) Commercial Vehicle Inspection Program
c) Commercial Vehicle Standards Alliance
- A vehicle on which you did a brake job has been involved in an injury accident. The
owner can sue your employer and you.
a) true
b) false
a) true
- Asbestos is a health hazard. What can you do to protect yourself from this material?
a) Wear a breathing mask, as asbestos affects your lungs.
b) Wash parts with water or a brake cleaning solution.
c) Do not use compressed air to clean brake parts.
- Injuries can occur around heavy equipment and components. How can you protect
yourself from injury?
a) Use hoists, jacks, lifting and moving equipment.
b) Have your co-workers assist when lifting and moving large parts.
c) Lift properly - use your legs.
- Flexible brake lines must not bulge or expand outward under high pressure
applications.
a) true
b) false
A. True
- What is meant by the term maximum diameter as it relates to brake drums?
This is the greatest diameter recommended by the vehicle manufacturer (discard
diameter).
- What is meant by the term minimum thickness as it relates to brake rotors?
This is the thinnest the rotor can be as recommended by the manufacturer (discard
thickness).
- What or who are your sources of information regarding a customer’s vehicle brake
problem(s)?
a) the vehicle operator
b) a service advisor
c) a work order
d) your own observations on a walk-around
e) a road test
- What two (2) methods can you use to detect equipment problems once a customer
brings a vehicle to your shop?
a) vehicle walk around; look and touch
b) vehicle road tests, listen and feel
- What safety precautions should you observe before working on or under a vehicle?
a) Use recommended jacking points and an adequate capacity jack or hoist to lift
the vehicle.
b) Place on correct capacity axle stands.
c) Use proper lifting and moving equipment.
- Why would you only work on one brake assembly at a time on the same axle?
The assembled side is a reference for checking your work.
- Drum diameter, out-of-round and taper are three checks used to determine brake
drum condition?
. a) true
- A brake drum that has a crack in it can be welded and returned to service.
a) true
b) false
b) false; Never weld a brake drum.
- A new brake drum and a used brake drum can be used on the same axle? Explain
your answer.
a) true
b) false
Not normally unless the worn drum is within 0.010” (0.254mm) of the new drum
diameter.
- After machining, brake drums should be sanded with a 240 grit sandpaper. Why is
this done?
This removes cutting grooves and creates a non-directional finish so the shoes do not
move sideways during application.
- If brake return springs are discolored and slightly bent, they can be safely
straightened and returned to service.
a) true
b) false
b) false; Springs will fail in service or not provide proper tension.
- Grease or oil on brake linings or on drum or disc friction surfaces can be wiped off
with Varsol and the parts will remain serviceable.
a) true
b) false
b) false; Varsol itself is oil based and will contaminate linings and friction
surfaces.
- During inspection, brake rotors are measured for:
a) parallelism.
b) lateral run out.
c) rotor thickness.
d) maximum diameter.
e) all but d are correct
e) all but d are correct.
- What two methods are used to mount brake linings to brake shoes and brake pads?
a) Bolts and Machine screws
b) Bonding and Riveting
c) Brazing and Welding
d) High temperature and High pressure
b) bonding and riveting.
- Prior to pad removal and caliper disassembly, what precaution should be taken before
pushing the pistons back into the caliper bores?
Remove about ½ the volume of brake fluid from the disc brake reservoir in the
master cylinder.
- When the caliper is unfastened from the anchor plate what safety precaution should
be followed?
Hang the caliper from a stable point to prevent damage to the flex hose
- Rotor thickness should be the same from one side of the vehicle to the other on the
same axle.
a) true
b) false
A. True
- Wheel bearings which are adjusted too loosely can have a negative effect on braking.
a) true
b) false
A. True
- Explain why wear indicators are used with disc brake pads?
Wear indicators provide an audible and/or visual warning ofreduced pad lining
thickness. This helps prevent rotor damage.
- The diaphragm seal between the filler cover and the master cylinder body prevents
outside air from contacting the brake fluid. This prevents water vapor from
contaminating the brake fluid.
a) true
b) false
A. True
- Aluminum master cylinders and aluminum wheel cylinders should not be honed as
part of a repair process.
a) true
b) false
A. True
- What fluid is suitable for use when honing a brake cylinder?
Brake fluid
- Grease or oil on rubber brake parts poses no problem for the parts or the system.
a) true
b) false
b) false; Grease and oil can cause rubber parts to swell.
