SOS Mechanic
Certification- Brakes
LATEST 2025-2026 EXAM
WITH QUESTIONS AND
CORRECT VERIFIED
ANSWERS GRADED A+
A mechanic finds gear lube inside both rear brake drums on a rear wheel drive vehicle.
What is the most likely cause of this problem? - ANSWER-A plugged axle
Which of the following incorrect service procedures will cause brake lock-up? -
ANSWER-master cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS system? -
ANSWER-Pump the brake pedal at least 25 times (or more, depending on the
manufacturer's recommendation) with the ignition off.
, The rear brakes are dragging after having new linings installed and the drums
machined. the most likely cause is the: - ANSWER-technician use the parking brake to
adjust shoes and the cable is stuck
When turning brake drums: - ANSWER-use a dampening strap to reduce chatter
Which of the following is NOT a necessary drum brake measurement? - ANSWER-run-
out
On a 3-channel system, which wheels are on the same circuit? - ANSWER-both rear
wheels
One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. -
ANSWER-AC volts
The key input for the ABS control module comes from the: - ANSWER-wheel speed
sensors
ABS speed sensor and sensor rings: - ANSWER-should not be hammered or tapped on
and should always be replaced as a matched set
Flexible brake hoses should be replaced: - ANSWER-when dampness is evident on the
hose
Which of the following should be used to check for rotor thickness variation: - ANSWER-
Micrometer
After rebuilding a master cylinder, the rod between the master cylinder and booster
should be: - ANSWER-adjusted properly
Upon inspecting brake fluid condition, the technician observes the diaphragm in the
master cylinder cup is swollen. Which of the following is the most likely cause? -
ANSWER-silicone fluid added to the system
When inspecting brake fluid levels, a technician observes low fluid levels. which of the
following should be done first? - ANSWER-Inspect disc brake pads for excessive wear
Which of the following is true about most properly functioning anti-lock brake systems? -
ANSWER-The brakes may lock up at speeds less than 10 miles per hour
Which of the following is true about bleeding brake lines on most ABS equipped
vehicles? - ANSWER-Most ABS brake lines can be bled like a conventional (non-ABS)
system. However, caution must be taken because of the extreme pressure.
Certification- Brakes
LATEST 2025-2026 EXAM
WITH QUESTIONS AND
CORRECT VERIFIED
ANSWERS GRADED A+
A mechanic finds gear lube inside both rear brake drums on a rear wheel drive vehicle.
What is the most likely cause of this problem? - ANSWER-A plugged axle
Which of the following incorrect service procedures will cause brake lock-up? -
ANSWER-master cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS system? -
ANSWER-Pump the brake pedal at least 25 times (or more, depending on the
manufacturer's recommendation) with the ignition off.
, The rear brakes are dragging after having new linings installed and the drums
machined. the most likely cause is the: - ANSWER-technician use the parking brake to
adjust shoes and the cable is stuck
When turning brake drums: - ANSWER-use a dampening strap to reduce chatter
Which of the following is NOT a necessary drum brake measurement? - ANSWER-run-
out
On a 3-channel system, which wheels are on the same circuit? - ANSWER-both rear
wheels
One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. -
ANSWER-AC volts
The key input for the ABS control module comes from the: - ANSWER-wheel speed
sensors
ABS speed sensor and sensor rings: - ANSWER-should not be hammered or tapped on
and should always be replaced as a matched set
Flexible brake hoses should be replaced: - ANSWER-when dampness is evident on the
hose
Which of the following should be used to check for rotor thickness variation: - ANSWER-
Micrometer
After rebuilding a master cylinder, the rod between the master cylinder and booster
should be: - ANSWER-adjusted properly
Upon inspecting brake fluid condition, the technician observes the diaphragm in the
master cylinder cup is swollen. Which of the following is the most likely cause? -
ANSWER-silicone fluid added to the system
When inspecting brake fluid levels, a technician observes low fluid levels. which of the
following should be done first? - ANSWER-Inspect disc brake pads for excessive wear
Which of the following is true about most properly functioning anti-lock brake systems? -
ANSWER-The brakes may lock up at speeds less than 10 miles per hour
Which of the following is true about bleeding brake lines on most ABS equipped
vehicles? - ANSWER-Most ABS brake lines can be bled like a conventional (non-ABS)
system. However, caution must be taken because of the extreme pressure.
