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SOS MECHANIC CERTIFICATION EXAM
QUESTIONS WITH CORRECT ANSWERS
“Most 1995 & newer vehicles use which of the following types of wheels bearings on non-drive
wheel? - CORRECT ANSWER Sealed non-serviceable"
"Which of the following describes the proper way to depressurized an ABS system? - CORRECT
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: - CORRECT ANSWER technician use the parking brake to adjust
shoes and the cable is stuck"
"When turning brake drums: - CORRECT ANSWER use a dampening strap to reduce chatter"
"Which of the following is NOT a necessary drum brake measurement? - CORRECT ANSWER
run-out"
"On a 3-channel system, which wheels are on the same circuit? - CORRECT ANSWER both
rear wheels"
"One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. - CORRECT
ANSWER AC volts"
"Which of the following is true about most properly functioning anti-lock brake systems? -
CORRECT 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? -
CORRECT ANSWER Most 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 ANSWER a "spaced-saver" spare tire is being used and mismatched tires are being
installed"
"What does a load sensing proportioning valve do? - CORRECT ANSWER It 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 ANSWER Glazed brake pads"
"What type of rotor surface provides the best braking with new pads? - CORRECT ANSWER A
smooth, flat surface" "which of the following is a quick way to isolated a defective master cylinder? There are no
external leaks in the system. - CORRECT ANSWER pump up the brake pedal, then hold it
firm. if the pedal slowly drops to the floor, the master cylinder may be defective."
"A common cause of pedal pulsation during brake application is: - CORRECT ANSWER NOT
caused by improperly torqued wheels, damaged backing plates, or lubricated shims" "the car is at reset. When you slowly apply the brake pedal you hear a squeaking noise at the rear
of the vehicle. what could cause this noise? - CORRECT ANSWER dry backing plate contact
surfaces" "While test driving a car, the mechanic finds that the right front brake "grabs". The most likely
cause of this problem is: - CORRECT ANSWER brake fluid or grease on the brake linings"
"Which lining does most of the braking on a leading/trailing brake? - CORRECT ANSWER
primary shoe"
"This tool is used to? - CORRECT ANSWER Adjust the brake shoes to the drum"
"Which of the following could be a symptom of over-torqued lug nuts? - CORRECT ANSWER
A brake pedal pulsation during braking." "Which of the following describes the proper sequence to bleed brake lines on most rear wheel
drive vehicles: - CORRECT ANSWER RR, LR, RF, LF"
"In disc brake caliper assemblies, the "square cut seal" is usually located: - CORRECT
ANSWER In the caliper piston bore"
"When performing a caliper overhaul, what would you use to remove the pistons from the
calipers? - CORRECT ANSWER Compressed air"
"Which of the following describes the proper sequence to bleed brake lines on most rear wheel
drive vehicles: - CORRECT ANSWER RR, LR, RF, LF"
"In disc brake caliper assemblies, the "square cut seal" is usually located: - CORRECT
ANSWER In the caliper piston bore"
"When performing a caliper overhaul, what would you use to remove the pistons from the
calipers? - CORRECT ANSWER Compressed air"
"Sliding caliper disc brake pads are kept in adjustment by the - CORRECT ANSWER Square
cut piston seal"
"A cracked or torn vacuum diaphragm in a power booster would likely cause: - CORRECT
ANSWER Hard pedal with very high effort required"
"When the brakes are applied on a car with disc-drum brakes, a vibration or pulsating movement
is felt. What can cause this problem? - CORRECT ANSWER A rotor thickness variation"
"While test driving a car, the mechanic finds that the right front brake "grabs". The most likely
cause of this problem is: - CORRECT ANSWER Brake fluid or grease on the brake linings."
"During a road test, you find that when normal breaking pressure is applied the pedal slowly goes
to the floor. What is the likely cause of this problem? - CORRECT ANSWER A leaking master
cylinder primary piston seal." "A rattle is a single piston disc brake assembly which goes away when the brakes are applied is
most likely a result of: - CORRECT ANSWER Loose pads in the caliper"
"Which of the following would most likely cause dragging brakes? - CORRECT ANSWER A
defective vehicle load sensor" "With the car standing still, you can hear a squeaking noise when applying the brake pedal
slowly. What could cause this noise? - CORRECT ANSWER Dry backing plate contact
surfaces." "There is a scraping sound coming from one rear brake. The sound stops when the brakes are
applied. What is the likely cause of the problem? - CORRECT ANSWER A broken shoe hold-
down spring or pin"
"If a drum brake self-adjuster seizes up, the likely result will be: - CORRECT ANSWER A low
pedal"
"Which of the following can be used to check for rotor thickness variation? - CORRECT
ANSWER Dial indicator"
"On a vehicle with a disc/drum brake system, the rear wheels lock up under hard braking. The
most likely cause is: - CORRECT ANSWER A defective proportioning valve"
"The brakes of a car tend to drag, which of the following could be the cause? - CORRECT
ANSWER A stuck wheel cylinder or caliper piston"
"Which of the following conditions does not dictate that the brake hydraulic system be flushed
after the necessary repairs have been made? - CORRECT ANSWER Evidence of air in the
system"
"When repairing damaged brake line, which of the following is correct? - CORRECT ANSWER
Replace entire line that is damaged with a new line bent to the right shape using a tube bender" "Technician A says a bad brake hose may cause a fluid leak. Technician B says a defective bake
hose may cause a restriction in the hydraulic circuit. Who is right? - CORRECT ANSWER
Both A & B" "Technician A uses a pressure tester to check the operation of the accumulator, hydraulic pump, and controls of an ABS system during diagnosis. Technician B checks an ABS system by checking
the codes in the control computers memory. Who is right? - CORRECT ANSWER Both A & B"
"Technician A says that brake drums should never be matched beyond the maximum diameter designated on the drum. Technician B says that a brake drum with more than 0.005 inch out-of-
roundness should be machined true on a lathe. Who is right? - CORRECT ANSWER Both A &
B"
"A customer complains that the brake pedal slowly moves to the floor when a steady pressure is applied. There is no sign of fluid leakage. Which of the following is the most portable cause of the
problem? - CORRECT ANSWER A worn primary cup"
"While discussing the effects of a leak in the primary hydraulic pressure system. Technician A says no pressure will be developed in the primary pressure chamber of the master cylinder. Technician B says he brakes served by the primary pressure chamber will not operate. Who is
right? - CORRECT ANSWER Both A & B"
"The front brakes of a car equipped with disc brakes in the front and drum brakes in the rear, grab quickly as light pressure is applied to the brake pedal, which of the following could be the
cause of the problem? - CORRECT ANSWER Defective metering valve"
"Technician A says when you are installing a new set of brake shoes a small amount of brake grease should be put on the heel and toe of the shoe. Technician B says when you are installing a new set of brake shoes, grease should be put on all areas of the backing place where there is
metal-to-metal contact. Who is right? - CORRECT ANSWER B only"
"Technician A says the above operation is necessary on some disc brake pads to secure them to the caliper. Technician B says that channel lock pliers should be used to clinch the shoe ears to
the caliper housing. Who is right? - CORRECT ANSWER Both A & B"
"The brake lights on a car do not light when the brake pedal is depressed, which of the following
is the LEAST likely cause of the problem? - CORRECT ANSWER A burned out bulb."
"Technician A says when the disc brakes anti-rattle springs are incorrectly positioned or missing, the brakes will rattle when they are not being applied. Technician B says if there is a rattle from the brakes when they are not applied, the caliper mounting bolts are probably loose. Who is
right? - CORRECT ANSWER Both A & B"
"What does a load sensing proportioning valve do? - CORRECT ANSWER It increases the
hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded"
"If vacuum is present on both sides of the diaphragm in a brake booster: - CORRECT ANSWER
The brakes are being released" "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 ANSWER A plugged axle vent"
"Which of the following is not a necessary precaution to follow when performing brake repairs on
an ABS equipped vehicle? - CORRECT ANSWER Always remove the electronic brake control
module fuse before adjusting or replacing a wheel speed sensor"
"Which of the following is true when inspecting wheel speed sensors? - CORRECT ANSWER
You should measure the air gap between the sensor and the reluctor wheel teeth"
"Which of the following is true about most properly functioning anti-lock brake systems? -
CORRECT ANSWER The brakes may lock up at speeds less than 10 miles per hour"
"Which of the following would be the result of an inoperative ABS pump/motor assembly: -
CORRECT ANSWER Conventional braking should still be available"
"Which of the following is true about bleeding brake lines on most ABS equipped vehicles? -
CORRECT ANSWER Most ABS brake lines can be bled like a convention ( non ABS) system
(Caution must be taken because of the extreme pressure)"
"Which of the following describes the proper way to depressurized an ABS system? - CORRECT
ANSWER Pump the brake pedal at least 25 times (or more, depending on the manufacturer's
recommendation) with the ignition off."
"A common cause of pedal pulsation during brake application is: - CORRECT ANSWER NOT
caused by improperly torqued wheels, damaged backing plates, or lubricated shims"
"A properly functioning load sensing proportioning valve will: - CORRECT ANSWER cause an
increase in the hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded." "which of the following is a quick way to isolated a defective master cylinder? There are no
external leaks in the system. - CORRECT ANSWER pump up the brake pedal, then hold it
firm. if the pedal slowly drops to the floor, the master cylinder may be defective." "After rebuilding a master cylinder, the rod between the master cylinder and booster should be:
CORRECT 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? - CORRECT 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? - CORRECT ANSWER Inspect disc brake pads for excessive wear"
"During a road test, you find that when normal braking pressure is applied the pedal slowly goes
to the floor. what is the most likely cause of this problem? - CORRECT ANSWER a leaking
master cylinder primary piston seal"
"Wheel speed sensors: - CORRECT ANSWER send an A/C signal to the control module"
"A mechanic is going to adjust the curb height on a car with torsion bars. To do this the car should
be checked: - CORRECT ANSWER on a level surface with the car at curb weight"
"A proper way to check ball joints for wear is by: - CORRECT ANSWER visual observation of
the wear indicator & unloading the ball joint and using a pry bar and a dial indicator" "which of the following adjustments can be made on all vehicles with MacPherson strut
suspensions? - CORRECT ANSWER Toe settings"
"You are checking the war on ball joints with a dial indicator at the wheel rim. What must you do
to get accurate readings? - CORRECT ANSWER check the wheel bearing adjustment and
correct if needed" "While replacing a ball joint, you notice that the tapered hole in the steering knuckle is oval
shaped. What should you do about this? - CORRECT ANSWER Inform the customer that the
knuckle should be replaced."
"If the upper ball joints are positioned ahead of the lower ball joints, the condition is: -
CORRECT ANSWER Negative caster"
"What is true of most MacPherson type suspensions? - CORRECT ANSWER There is no upper
control arm." "A mechanic has set caster, camber, and toe-in to specifications. On the road test afterwards, the mechanic notices that the steering wheel spokes are off center to the left. What should be done to
fix this? - CORRECT ANSWER Adjust both tie rod sleeves equally to move the front wheels in
the direction of the steering wheel error"
"Ball joints with wear indicators should be checked: - CORRECT ANSWER when loaded and
by visual observation"
"There is a looseness in the steering column, which of these could cause this problem? -
CORRECT ANSWER Loose steering column universal joints"
"Which of these could cause dangerous handling, uncomfortable ride, and noise due to excessive
sideways body movement? - CORRECT ANSWER Broken rear track bar"
"A vehicle has unusual noises when it is jounced up and down, all of these could cause this
problem except: - CORRECT ANSWER worn tie rod ends"
"If the upper ball joint is positioned behind the lower ball joint, which of these describes the
alignment condition? - CORRECT ANSWER Positive caster."
"Which of these correctly states when a power steering system should be bled? - CORRECT
ANSWER When the fluid becomes aerated"
"While diagnosing a vehicle that has a tendency to bump steer, which of these should be checked
first? - CORRECT ANSWER Wheel setback"
"Which of these is NOT part of the normal procedure for replacing a front stabilizer bar? -
CORRECT ANSWER Disconnect the tie-rod ends"
"Which of these does NOT need to be checked prior to a wheel alignment? - CORRECT
ANSWER Tire balance"
"Which of these can cause front wheel shimmy? - CORRECT ANSWER Loos steering linkage"
"Which of these would cause the tires to wear in the center of a tire tread? - CORRECT
ANSWER over inflated tires"
"Which of the following is correct statements about the effects of the imbalance? - CORRECT
ANSWER Static imbalance will cause wheel tramp"
"Which of these is not a possible cause for an increase in steering effort? - CORRECT ANSWER
Worn ball joints"
"Which of these correctly states the purpose of the pop rivet found in some strut top plates? -
CORRECT ANSWER The rivet secures the plate I position to maintain camber"
"A car pulls to the left, which of these could cause the problem? - CORRECT ANSWER Left
front wheel has too much negative caster"
"A tire wobbles from side to side, which of these could cause this problem? - CORRECT
ANSWER Lateral runout"
"Name the Tread Wear and how it is caused - CORRECT ANSWER Chopped Wear: Caused by
lack of rotation or unbalanced tires and wears tread in various spots creating a chopped tread"
"Name the Tread Wear and how it is caused - CORRECT ANSWER Cupped Wear: Caused by
excessive wheel jounce from worn suspension and creates bald spots on the tread"
"This would Increase Caster - CORRECT ANSWER How would adding/subtracting shims as
performed in the picture effect the alignment (Note the location of the front of the vehicle)"
"This would Decrease Caster - CORRECT ANSWER How would adding/subtracting shims as
performed in the picture effect the alignment (Note the location of the front of the vehicle)"
"This would Increase Camber - CORRECT ANSWER How would adding/subtracting shims as
performed in the picture effect the alignment (Note the location of the front of the vehicle)"
"This would Decrease Camber - CORRECT ANSWER How would adding/subtracting shims as
performed in the picture effect the alignment (Note the location of the front of the vehicle)"
"This movement would Increase Caster - CORRECT ANSWER How would moving toward B
effect the alignment?"
"This movement would Decrease Camber - CORRECT ANSWER How would moving toward C
effect the alignment?"
"This movement would Decrease Caster - CORRECT ANSWER How would moving toward A
effect the alignment?"
"This movement would Increase Camber - CORRECT ANSWER How would moving toward D
effect the alignment?" "Tighten the castle nut slightly in order to line the slot on the castle nut up with the hole in order
to install the castle nut. Never loosen it below torque specification - CORRECT ANSWER After
tightening a castle nut on a ball joint to the torque specification you find the hole for the cotter pin in the stud does not line up with a slot on the castle nut and you are unable to install the cotter pin.... Should you tighten the nut slightly to line up the slot with the hole or loosen it slightly to line up the slot with the hole? "you will see 2 similar answers clue is a number 45 just pick the longer answer"" "How to adjust toe on rack and pinion suspension, thus changing the length of the steering
linkage - CORRECT ANSWER Loosen the lock nut and turn the inner tierod"
"Loosen the locking sleeve nuts and rotate the adjusting sleeve, thus changing the length of the
steering linkage - CORRECT ANSWER How to adjust toe on a parallelogram system"
"An imaginary line that is drawn perpendicular from the centerline of the rear axle, down the
centerline of the vehicle - CORRECT ANSWER What is the thrust angle?"
"An out-of-position axle or incorrect toe setting - CORRECT ANSWER What is the cause of an
off-set thrust angle?"
"Diagonal tire wear, pulling or drifting while driving and an off-set steering wheel - CORRECT
ANSWER What is the effect of an off-set thrust angle?"
"During low speed operation - CORRECT ANSWER When does variable assist power steering
provide maximum pressure?"
"During high speed operations - CORRECT ANSWER When does variable assist power
steering provide minimum pressure?"
"Is Caster adjustable on all vehicles? - CORRECT ANSWER Caster is NOT adjustable on some
vehicle"
"What are shim adjusted control arms used on? - CORRECT ANSWER Typically used on older
RWD vehicles that contain front SLA suspension"
"In what sequence should an alignment be performed? - CORRECT ANSWER Caster, camber,
toe (in that order)"
"What is not a tire wearing angle? - CORRECT ANSWER Caster"
"What causes a steering wheel to return to center? - CORRECT ANSWER A normal positive
caster angle"
"How does Caster effect which way a vehicle pulls - CORRECT ANSWER Vehicles will pull to
the side with more negative caster"
"How does Camber effect which way a vehicle pulls - CORRECT ANSWER A vehicle will pull
to the side with more positive camber"
"What is a typical camber angle - CORRECT ANSWER Close to zero to provide maximum tire
contact with the road"
"Which of the following is a true statement about proportioning valves? - CORRECT ANSWER
They provide better braking balance during hard stops"
"A properly functioning load sensing proportioning valve will: - CORRECT ANSWER cause an
increase in the hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded."
"Why don't disc brake system usually need adjustment? - CORRECT ANSWER A certain
amount of pressure is maintained by the metering valve" "The front brakes of a car equipped with disc brakes in the front and drum brakes in the rear, grab quickly as light pressure is applied to the brake pedal, which of the following could be the
cause of the problem? - CORRECT ANSWER Defective metering valve"
"The brake warning light on the dash stays on all the time, which of the following could be the
cause of the problem? - CORRECT ANSWER A problem in the hydraulic circuit"
"Which of the following would be the LEAST likely cause for an intermittent problem in an ABS
system? - CORRECT ANSWER Open wheel sensor circuit"
"The brake lights on a car do not light when the brake pedal is depressed, which of the following
is the LEAST likely cause of the problem? - CORRECT ANSWER A burned out bulb."
"Which of the following incorrect service procedures could cause brake pedal pulsation? -
CORRECT ANSWER incorrect run-out on the car brake lathe"
"Wheel speed sensors: - CORRECT ANSWER send an A/C signal to the control module"
"Which of the following incorrect service procedures will cause brake lock up? - CORRECT
ANSWER Master Cylinder push rod adjusted too long"
"During a road test, you find that when normal breaking pressure is applied the pedal slowly goes
to the floor. What is the likely cause of this problem? - CORRECT ANSWER A leaking master
cylinder primary piston seal."
"Before replacing a hydralic brake hose on an ABS equipped vehicle, you should first: -
CORRECT ANSWER relieve brake system pressure according to manufacturer procedures"
"When would the pump motor be activated in an anti-lcok brake system with traction assist? -
CORRECT ANSWER when brake pedal pulsates"
"There is a scraping sound coming from one rear brake. The sound stops when the brakes are
applied. What is most likely the cause of the problem? - CORRECT ANSWER a broken shoe
hold-down spring or pin"
"If a drum brake self-adjuster seizes up, the likely result will be: - CORRECT ANSWER NOT a
low pedal, worn or brake drum, or a loose emergency brake cable." "After drum brakes have been applied and released, the brake fluid returns to the master cylinder
reservoir. What causes it to return? - CORRECT ANSWER brake shoe return springs"
"On a single anchor duo-servo drum brake system, which shoe does most of the braking? -
CORRECT ANSWER secondary shoe"
"There is a scraping sound coming from one rear brake. The sound stops when the brakes are
applied. What is the likely cause of the problem? - CORRECT ANSWER A broken shoe hold-
down spring or pin"
"Which of the following can be used to check for rotor thickness variation? - CORRECT
ANSWER Dial indicator"
"On a vehicle with a disc/drum brake system, the rear wheels lock up under hard braking. The
most likely cause is: - CORRECT ANSWER A defective proportioning valve"
"After putting a bearing race in a hub, you notice that the new race is loose and can spin in the
hub. What should you do? - CORRECT ANSWER Replace the hub"
"When adjusting disc-drum brakes, you should: - CORRECT ANSWER Adjust the rear brakes
after releasing the parking brakes"
"You are rebuilding a master cylinder. What should you use to lubricate the internal parts? -
CORRECT ANSWER Brake fluid"
"Which of the following is the most likely cause of low fluid level in the master cylinder? -
CORRECT ANSWER Worn brake pads and linings"
"Which of the following describes the correct sequence for bleeding brake lines on most front
wheel drive vehicles? - CORRECT ANSWER RR,LR, RF, LF"
"All of the following are steps in the procedure for servicing a typical dual master cylinder,
EXCEPT: - CORRECT ANSWER Clean the master cylinder with a degreasing solvent"
"Which of the following would be the result of an inoperative ABS pump/motor assembly: -
CORRECT ANSWER Conventional braking should still be available"
"What information might be found on a brake drum to help a mechanic? - CORRECT
ANSWER The maximum diameter dimension"
"When checking a newly turned drum before putting it back on, you notice a thread-like grooves
in the braking surface. Why are the grooves there? - CORRECT ANSWER The lathe was not
adjusted properly when the drum was turned" "After putting a bearing race in a hub, you notice that the new race is loose and can spin in the
hub. What should you do? - CORRECT ANSWER Replace the hub"
"When adjusting disc-drum brakes, you should: - CORRECT ANSWER Adjust the rear brakes
after releasing the parking brakes"
"What type of rotor surface provides the best braking with new pads? - CORRECT ANSWER A
smooth, flat surface" "Which of the following is a quick way to determine whether the master cylinder is bad? There
are no external leaks in the system. - CORRECT ANSWER Pump up the brake pedal, then hold
it firm. If the pedal slowly drops to the floor, the master cylinder is bad."
"You are rebuilding a master cylinder. What should you use to lubricate the internal parts? -
CORRECT ANSWER Brake fluid"
"Which of the following is the most likely cause of low fluid level in the master cylinder? -
CORRECT ANSWER Worn brake pads and linings"
"After drum brakes have been applied and released, the brake fluid returns to the master cylinder
reservoir. What causes it to return? - CORRECT ANSWER Brake shoe return springs"
"Which of the following describes the correct sequence for bleeding brake lines on most front
wheel drive vehicles? - CORRECT ANSWER RR,LR, RF, LF"
"Technician A says that excessive pedal travel can be caused by low brake fluid levels; Technician B says that the excessive pedal travel can be caused by air in the hydraulic system? Who is right?
CORRECT ANSWER Both A and B"
"All of the following are steps in the procedure for servicing a typical dual master cylinder,
EXCEPT: - CORRECT ANSWER Clean the master cylinder with a degreasing solvent"
"Technician A says it is normal for the amber "Anti-Lock Brake" lamp to light when the system is activated during braking. Technician B says it is normal for the red "Anti-Lock Brake" lamp to be
on whenever the ignition is on and the engine is off. Who is right? - CORRECT ANSWER
Neither A or B" "When adjusting the front wheel bearings of a rear-wheel-drive car: Technician A tightens the adjusting nut until there is no tire wobble. Technician B tightens the adjusting nut to the appropriate torque, then tightens it slightly more to line the castellations of locking nut with the
cotter pin hole. Who is right? - CORRECT ANSWER Neither A or B"
"Technician A says it is normal for brake shoes to have excessive wear in the center of the shoe. Technician B says if the lining is less than 1/32 of an inch above the rivets, it should be replaced.
Who is right? - CORRECT ANSWER B only"
"Technician A bench bleeds the master cylinder before installing it on the car. Technician B depresses the pistons and allows gravity to push air out of the master cylinder before connecting
the brake lines to the master cylinder. Who is right? - CORRECT ANSWER A only"
"Which of the following is the LEAST likely cause of one brake dragging? - CORRECT
ANSWER A corroded master cylinder bore"
"A car has a spongy pedal. Which of the following could be the cause? - CORRECT ANSWER
Air in the system." "Technician A says a stuck caliper piston can cause the car to pull during braking. Technician B says a broken return spring in a rear drum brake can cause the car to pull during braking. Who is
right? - CORRECT ANSWER Both A & B"
"Which of the following is not correct in the procedure for preparing a brake rotor for matching?
CORRECT ANSWER Use a brake micrometer to measure the diameter"
"A car equipped with a vacuum assist power brake system reads an abnormal amount of pedal
effort to stop the car, which of the following could be the cause? - CORRECT ANSWER A
plugged booster air breather" "While diagnosing a braking problem on a car equipped with a vacuum power booster: Technician A says excessive pedal travel can be caused by a leaking check valve. Technician B says excessive pedal travel can e caused by an improperly adjusted master cylinder push rod.
Who is right? - CORRECT ANSWER B only"
