BRAKES ACTUAL EXAM QUESTIONS
AND ANSWERS ALL CORRECT
The proper operation of a vacuum brake booster requires that the engine be capable of
supplying at least - Answer-15 in Hg vacuum
The purpose of charcoal filter in the vacuum hose between the engine and the vacuum
brake booster is to - Answer-Filter the air entering the engine
A defective vacuum brake booster will cause a ________. - Answer-Hard brake pedal
An accumulator such as that used on electric or hydraulic brake boosters ________. -
Answer-Provides a reserve in the event of a failure
The first step in diagnosing a hydro boost problem - Answer-Thorough visual inspection
A brake pedal feels spongy when depressed. Technician A says that a defective
hydraulic brake booster could be the cause. Technician B says that a defective vacuum
brake booster could be the cause. Which technician is correct? - Answer-Neither
Technician A nor B
If the engine stops running, the Hydro-Boost will not be able to provide any power assist
for the brakes. - Answer-True hydro boost engine won't operate however accumulator
holds reserve of hydraulic pressure
Which type of antilock brake system requires the use of four wheel speed sensor -
Answer-Four channel
The maximum traction between a tire and road occurs when tire is - Answer-Slipping
10% to 20%
Antilock brakes cannot defy the laws of physics under what conditions - Answer-All of
the above
Technician A says that most ABS units are nonintegral technician B says that the ABS
is diasabled does not function below 5 mph which technician is correct - Answer-Tech A
,Technician A says that ABS brakes are designed to allow the front wheel to be steered
during heavy braking. Technician B says that the ABS dash warning lamp is Amber -
Answer-Both
A passive wheel speed sensor is also referred to as - Answer-Variable reluctance
An active wheel speed sensor is also referred to as - Answer-Hall effect and magneto
resistive
Which part of an antilock brake system is used for tire pressure monitoring - Answer-
Wheel speed sensor also TPMS sensors
The red brake warning lamp is on and the amber ABS lamp is off. Technician A says
that a fault is possible in the base brake system. Technician B says that the red brake
warning lamp can be turned on by a low brake fluid level in the master cylinder -
Answer-Both
Two technicians are discussing passive type speed sensors. Technician A says that
wheel speed sensors are magnetic. Technician B says that the tooth sensor ring is
magnetic - Answer-Tech A
Technician A says that using space saving small spare tire may trigger an ABS amber
warning lamp. Technician B says the use of the small spare tire may trigger the red
brake warning lamp - Answer-Tech A
A passive type wheel speed sensor is being checked for proper resistance which should
be 800-2500 ohms the meter reads 1.1 k ohms - Answer-The sensor has a normal
resistance reading
What type of scan tool is unlikely to provide data from the antilock brake system ABS -
Answer-Code reader
A cracked tone reflector ring will often cause what type of problem - Answer-False ABS
actuation at low speed
Most wheel speed sensors should measure how much resistance? - Answer-800 to
2500 ohms
Technician A says that the ABS electro hydraulic unit can be bled using bleeder screws
and the manual method. Technician B says that a scan tool is often required to bleed
the ABS electrohydraulic unit. - Answer-Both
The electronic stability control ESC system requires that the vehicle be equipped with
what type of brake system - Answer-Four-channel ABS
, Which Federal Motor Safety Standard requires electronic stability control to be on all
vehicles by 2011? - Answer-126
What is the name of the standard test that is performed to verify ESC operation -
Answer-Sine with dwell
What other name is used to describe an electronic stability control ESC system -
Answer-Vehicle stability assist electronic stability program vehicle dynamic control
Which sensor is used by the ESC controller to determine the driver's intended direction?
- Answer-Steering wheel (hand wheel) position sensor
A lateral acceleration sensor is usually located where in the vehicle? - Answer-Under
the front seat in the center console on the package shelf
If a vehicle tends to continue straight ahead while cornering, this condition is called
_____. - Answer-understeer
Traction control uses the antilock brake system and other devices to limit ? Of the drive
wheels during acceleration - Answer-Positive slip
Which type of regenerative braking system uses an electrohydraulic system - Answer-
Series
kinetic energy - Answer-energy of motion
Technician A says that the powertrain control module or controller can control the
voltage to the motors in a hybrid electric vehicle. Tech B says that the PCM or controller
can control the electric motors by varying the frequency of the applied current - Answer-
Tech B
Technician A says that a front wheel drive hybrid electric vehicle can only generate
electricity during braking from the front wheel motors. Technician B says that the anti
lock brake is not possible with vehicle equipped with a regenerative braking system -
Answer-Tech A
In a Toyota Prius regenerative braking system how many pressure sensors used -
Answer-Four
In the Toyota Prius regerarive braking system how many pressure switches - Answer-
Two
Two technicians are discussing decelaeration rates. Technician A says that a one g
stop is a gentle slowing of the vehicle. Technician B says that a stopping rate of 8ft/sec2
is a server stop - Answer-Neither
AND ANSWERS ALL CORRECT
The proper operation of a vacuum brake booster requires that the engine be capable of
supplying at least - Answer-15 in Hg vacuum
The purpose of charcoal filter in the vacuum hose between the engine and the vacuum
brake booster is to - Answer-Filter the air entering the engine
A defective vacuum brake booster will cause a ________. - Answer-Hard brake pedal
An accumulator such as that used on electric or hydraulic brake boosters ________. -
Answer-Provides a reserve in the event of a failure
The first step in diagnosing a hydro boost problem - Answer-Thorough visual inspection
A brake pedal feels spongy when depressed. Technician A says that a defective
hydraulic brake booster could be the cause. Technician B says that a defective vacuum
brake booster could be the cause. Which technician is correct? - Answer-Neither
Technician A nor B
If the engine stops running, the Hydro-Boost will not be able to provide any power assist
for the brakes. - Answer-True hydro boost engine won't operate however accumulator
holds reserve of hydraulic pressure
Which type of antilock brake system requires the use of four wheel speed sensor -
Answer-Four channel
The maximum traction between a tire and road occurs when tire is - Answer-Slipping
10% to 20%
Antilock brakes cannot defy the laws of physics under what conditions - Answer-All of
the above
Technician A says that most ABS units are nonintegral technician B says that the ABS
is diasabled does not function below 5 mph which technician is correct - Answer-Tech A
,Technician A says that ABS brakes are designed to allow the front wheel to be steered
during heavy braking. Technician B says that the ABS dash warning lamp is Amber -
Answer-Both
A passive wheel speed sensor is also referred to as - Answer-Variable reluctance
An active wheel speed sensor is also referred to as - Answer-Hall effect and magneto
resistive
Which part of an antilock brake system is used for tire pressure monitoring - Answer-
Wheel speed sensor also TPMS sensors
The red brake warning lamp is on and the amber ABS lamp is off. Technician A says
that a fault is possible in the base brake system. Technician B says that the red brake
warning lamp can be turned on by a low brake fluid level in the master cylinder -
Answer-Both
Two technicians are discussing passive type speed sensors. Technician A says that
wheel speed sensors are magnetic. Technician B says that the tooth sensor ring is
magnetic - Answer-Tech A
Technician A says that using space saving small spare tire may trigger an ABS amber
warning lamp. Technician B says the use of the small spare tire may trigger the red
brake warning lamp - Answer-Tech A
A passive type wheel speed sensor is being checked for proper resistance which should
be 800-2500 ohms the meter reads 1.1 k ohms - Answer-The sensor has a normal
resistance reading
What type of scan tool is unlikely to provide data from the antilock brake system ABS -
Answer-Code reader
A cracked tone reflector ring will often cause what type of problem - Answer-False ABS
actuation at low speed
Most wheel speed sensors should measure how much resistance? - Answer-800 to
2500 ohms
Technician A says that the ABS electro hydraulic unit can be bled using bleeder screws
and the manual method. Technician B says that a scan tool is often required to bleed
the ABS electrohydraulic unit. - Answer-Both
The electronic stability control ESC system requires that the vehicle be equipped with
what type of brake system - Answer-Four-channel ABS
, Which Federal Motor Safety Standard requires electronic stability control to be on all
vehicles by 2011? - Answer-126
What is the name of the standard test that is performed to verify ESC operation -
Answer-Sine with dwell
What other name is used to describe an electronic stability control ESC system -
Answer-Vehicle stability assist electronic stability program vehicle dynamic control
Which sensor is used by the ESC controller to determine the driver's intended direction?
- Answer-Steering wheel (hand wheel) position sensor
A lateral acceleration sensor is usually located where in the vehicle? - Answer-Under
the front seat in the center console on the package shelf
If a vehicle tends to continue straight ahead while cornering, this condition is called
_____. - Answer-understeer
Traction control uses the antilock brake system and other devices to limit ? Of the drive
wheels during acceleration - Answer-Positive slip
Which type of regenerative braking system uses an electrohydraulic system - Answer-
Series
kinetic energy - Answer-energy of motion
Technician A says that the powertrain control module or controller can control the
voltage to the motors in a hybrid electric vehicle. Tech B says that the PCM or controller
can control the electric motors by varying the frequency of the applied current - Answer-
Tech B
Technician A says that a front wheel drive hybrid electric vehicle can only generate
electricity during braking from the front wheel motors. Technician B says that the anti
lock brake is not possible with vehicle equipped with a regenerative braking system -
Answer-Tech A
In a Toyota Prius regenerative braking system how many pressure sensors used -
Answer-Four
In the Toyota Prius regerarive braking system how many pressure switches - Answer-
Two
Two technicians are discussing decelaeration rates. Technician A says that a one g
stop is a gentle slowing of the vehicle. Technician B says that a stopping rate of 8ft/sec2
is a server stop - Answer-Neither
