SOS Mechanic Certification- Brakes
Exam Questions & Answers | 100%
Verified solutions |Questions with
Correct Answers 2025 latest update!!
Most 1995 & newer vehicles use which of the following types of wheels bearings on
non-drive wheel? - correct answerSealed non-serviceable
to test a vacuum power brake booster in the vehicle, you should pump the brake pedal
at least 4 times, hold the brake pedal depressed, and start the engine. the brake pedal
should: - correct answerdrop slightly and remain firm
You are installing a set of brake shoe linings that are not the same length. Traditionally,
the primary shoe lining is: - correct answerSmaller and goes towards the front of the
car.
A cracked or torn vacuum diaphragm in a brake power booster would most likely cause:
- correct answera hard pedal feel requiring very high pedal effort to stop
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? - correct answerA plugged axle
Which of the following incorrect service procedures will cause brake lock-up? - correct
answermaster cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS system? -
correct answerPump 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: - correct answertechnician use the parking brake
to adjust shoes and the cable is stuck
When turning brake drums: - correct answeruse a dampening strap to reduce chatter
Which of the following is NOT a necessary drum brake measurement? - correct
answerrun-out
On a 3-channel system, which wheels are on the same circuit? - correct answerboth
rear wheels
, One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. -
correct answerAC volts
The key input for the ABS control module comes from the: - correct answerwheel speed
sensors
ABS speed sensor and sensor rings: - correct answershould not be hammered or
tapped on and should always be replaced as a matched set
Flexible brake hoses should be replaced: - correct answerwhen dampness is evident on
the hose
Which of the following should be used to check for rotor thickness variation: - correct
answerMicrometer
After rebuilding a master cylinder, the rod between the master cylinder and booster
should be: - correct answeradjusted 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? - correct
answersilicone fluid added to the system
When inspecting brake fluid levels, a technician observes low fluid levels. which of the
following should be done first? - correct answerInspect disc brake pads for excessive
wear
Which of the following is true about most properly functioning anti-lock brake systems? -
correct answerThe 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? - correct answerMost ABS brake lines can be bled like a conventional (non-
ABS) system. However, caution must be taken because of the extreme pressure.
Most anti-lock brake systems require the removal of the pressure modulator fuse when:
- correct answera "spaced-saver" spare tire is being used and mismatched tires are
being installed
What does a load sensing proportioning valve do? - correct answerIt increases the
hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded
The brakes of a car squeal each time they are applied, which of the following is the
LEAST likely source of the noise? - correct answerGlazed brake pads
Which of the following is a true statement about proportioning valves? - correct
answerThey provide better braking balance during hard stops
Exam Questions & Answers | 100%
Verified solutions |Questions with
Correct Answers 2025 latest update!!
Most 1995 & newer vehicles use which of the following types of wheels bearings on
non-drive wheel? - correct answerSealed non-serviceable
to test a vacuum power brake booster in the vehicle, you should pump the brake pedal
at least 4 times, hold the brake pedal depressed, and start the engine. the brake pedal
should: - correct answerdrop slightly and remain firm
You are installing a set of brake shoe linings that are not the same length. Traditionally,
the primary shoe lining is: - correct answerSmaller and goes towards the front of the
car.
A cracked or torn vacuum diaphragm in a brake power booster would most likely cause:
- correct answera hard pedal feel requiring very high pedal effort to stop
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? - correct answerA plugged axle
Which of the following incorrect service procedures will cause brake lock-up? - correct
answermaster cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS system? -
correct answerPump 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: - correct answertechnician use the parking brake
to adjust shoes and the cable is stuck
When turning brake drums: - correct answeruse a dampening strap to reduce chatter
Which of the following is NOT a necessary drum brake measurement? - correct
answerrun-out
On a 3-channel system, which wheels are on the same circuit? - correct answerboth
rear wheels
, One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. -
correct answerAC volts
The key input for the ABS control module comes from the: - correct answerwheel speed
sensors
ABS speed sensor and sensor rings: - correct answershould not be hammered or
tapped on and should always be replaced as a matched set
Flexible brake hoses should be replaced: - correct answerwhen dampness is evident on
the hose
Which of the following should be used to check for rotor thickness variation: - correct
answerMicrometer
After rebuilding a master cylinder, the rod between the master cylinder and booster
should be: - correct answeradjusted 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? - correct
answersilicone fluid added to the system
When inspecting brake fluid levels, a technician observes low fluid levels. which of the
following should be done first? - correct answerInspect disc brake pads for excessive
wear
Which of the following is true about most properly functioning anti-lock brake systems? -
correct answerThe 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? - correct answerMost ABS brake lines can be bled like a conventional (non-
ABS) system. However, caution must be taken because of the extreme pressure.
Most anti-lock brake systems require the removal of the pressure modulator fuse when:
- correct answera "spaced-saver" spare tire is being used and mismatched tires are
being installed
What does a load sensing proportioning valve do? - correct answerIt increases the
hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded
The brakes of a car squeal each time they are applied, which of the following is the
LEAST likely source of the noise? - correct answerGlazed brake pads
Which of the following is a true statement about proportioning valves? - correct
answerThey provide better braking balance during hard stops
