Exam 51: Drum Brakes

In the unapplied position, drum brake shoes are held against the anchor pin by the ______.

On most vehicles, the automatic adjuster system ______.

Parking brake mechanisms provide a hydraulic force to apply the brake shoes and keep the vehicle stationary.

Drum brakes are still used on the front wheels of many late model cars and light trucks.

Technician A removes brake dust from the brake assembly with compressed air. Technician B uses an OSHA-approved brake washer to clean drum brake assemblies. Who is correct?

The last two letters printed on the edge of the shoe lining indicate ____.

Technician A says some drums are made entirely of cast iron. Technician B says some drums are made entirely of aluminum. Who is correct?

After machining, the brake drum must be at least ____________________ inch smaller than the discard diameter stamped or cast into the drum.

Why is it important to clean a brake drum after machining it?

On duo-servo drum systems, the forward brake shoe is often called the ____________________ shoe.

On most cars, the push nuts that hold the drum onto the studs of a floating drum do not need to be reinstalled after service.

During a brake inspection, the technician discovers that the right rear brake shoes are soaked with a liquid. Technician A says the wheel axle seal is leaking. Technician B says the wheel cylinder is leaking. Who is correc t?

What three checks should be made before conducting a road test for a brake problem?

List at least five types of wear or distortion to look for when inspecting brake drums.

The self-adjusters (star wheels)for the left side and the right side are interchangeable.

A self-adjuster screw mechanism (star wheel)  can be positioned on either the left or the right side of the vehicle.

A car with a broken timing belt is towed to your shop. The tow truck operator set the parking brake. The vehicle has an automatic vacuum parking brake release. Because the engine can't be started, the brakes won't release. How do you get the car into the shop?

Technician A says self-adjustment occurs on most duo-servo brakes whenever the foot brake is applied while backing up. Technician B says self-adjustment occurs on a non-servo brake whenever the foot brake is applied when driving forward. Who is correct?

A clicking noise heard when the brakes are applied could be caused by ______.

The function of the wheel cylinder is to ______.