chassis week 2 quiz

What causes the electromagnet to grip the armature surface on electric brake drum more firmly

• decreasing wire gauge

• increasing resistance

• increasing current

• increasing wattage

What component is labeled c

• magnet

• brake shoe

• brake drum

• backing plate

what component is used to adjust the brakes

• a

• b

• c

• d

To properly test a trailer brake controller, the technician should do all of the following EXCEPT

• drive the combination at 25 mph

• step on the foot break and listen for trailer tire lock up

• manually apply brake controller and listen for trailer tire lock up

• insure brakes have been burnished

When inspecting a brake magnet, which of the following defects would NOT indicate the magnet has failed

• even wear

• exposed coil

• uneven wear

• no electrical resistance

Grease should be applied to

• brake lining

• brake drums

• brake magnets

• brake anchor pin

Given a customer concern of “grinding noise when braking”, the technician should FIRST perform

• a visual inspection before making a repair

• a wheel alignment

• full front brake service

• full four wheel brake service

A customer complains that the brakes grab hard when braking the fifth wheel. A probable cause is that the

• pendulum is blocked

• level is out of balance

• gain is set too high

• wire size is too small

In an electric drum brake system, the brakes are applied

• when the magnet engages the drum

• when the brake shoes retract

• when the magnet engages the armature

• when the magnet rotates

When inspecting the electromagnets on the electric brake system, it is important to check for

• grease in the spindle

• flat magnet surface

• cracks in the brake pad

• proper magnet polarity