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Chapter 32 Anti-Lock Braking, Vehicle Stability, and Collision Avoidance Quiz Flashcards | StudBud
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Chapter 32 Anti-Lock Braking, Vehicle Stability, and Collision Avoidance Quiz
Chapter 32 Anti-Lock Braking, Vehicle Stability, and Collision Avoidance Quiz
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Chapter 32 Anti-Lock Braking, Vehicle Stability, and Collision Avoidance Systems Quiz
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1
TA blink code always be used to check sys malfunction TB ABS wheel sensor air gap set w/locknut
d). Neither Technician A nor Technician B
a). Technician A
b). Technician B
c). Both Technician A and Technician B
2
TA ABS system regulated under FMVSS 121 TB says every axle of tractor trailer must have ABS.
b). Technician B
c). Both Technician A and Technician B
a). Technician A
d). Neither Technician A nor Technician B
3
TA Mar 2001 veh/tow ABS equipped trailers must show ABS malfunction on dash TB ABS comm w/lineT
d). Neither Technician A nor Technician B
c). Both Technician A and Technician B
a). Technician A
b). Technician B
4
TA ABS sys only exh air selected brake chamber when wheel lockup TB mod valve hold/exh lockup
d). Neither Technician A nor Technician B
a). Technician A
c). Both Technician A and Technician B
b). Technician B
5
TA antilock braking sys improve veh control >stopping distance TB antilock sys/traction control
c). Both Technician A and Technician B
b). Technician B
a). Technician A
d). Neither Technician A nor Technician B
6
TA tractor ABS mod valve sol cycled w/ign turn on TB applying brake then switch ign on sol exh
b). Technician B
a). Technician A
c). Both Technician A and Technician B
d). Neither Technician A nor Technician B
7
TA wheel speed sensors usually Hall-effect sensors TB wheel speed sensors create digital signal
a). Technician A
b). Technician B
d). Neither Technician A nor Technician B
c). Both Technician A and Technician B
8
Combination vehicle If the tractor were equipped with ABS brake sys/trailer is not which occurs
b). Over steer
a). Jackknife
d). Trailer swing-out
c). Under steer
9
TA ABS trailer cord color coded green TB cords are different only as to wire size of conductors
d). Neither Technician A nor Technician B
c). Both Technician A and Technician B
a). Technician A
b). Technician B
10
Which of the following is not a stage of anti-lock operation during a potential skid situation?
c). Exhaust pressure
a). Hold pressure
d). Reapply pressure
b). Air bleeding
11
A yaw sensor is an input used by the directional stability control system to:
c). Measure difference of steered & actual vehicle direction
b). Measure the steering wheel angle.
d). Measure the rotation of tractor around trailer kingpin.
a). Detect if the vehicles center of gravity become too high
12
What type of electrical signal is supplied to the ABS ECU by wheel speed sensors?
d). Low voltage AC current
b). Serial data J-1939
a). Digital
c). Low voltage DC current
13
Which of the following is the air gap setting for a typical truck wheel speed sensor?
a). 0.005"
b). 0.010"
d). There is no air gap setting.
c). 0.015"
14
TA mod code fault could be caused def solenoid inside valve TB mod fault code can be slack adj
a). Technician A
c). Both Technician A and Technician B
b). Technician B
d). Neither Technician A nor Technician B
15
Automatic Traction Control brake application will normally not occur when which condition exist
a). Road speeds above 25 mph (40 kph).
b). Road speeds below 5 mph (8 kph).
d). When only one wheel is spinning.
c). Only when there is a system malfunction.
16
TA ABS sys must have red warning lamp TB warn lamp must come on for few sec/go out self test
b). Technician B
c). Both Technician A and Technician B
d). Neither Technician A nor Technician B
a). Technician A
17
Air anti-lock brake systems minimize wheel lockup by:
b). Holding air pressure in service brake chambers.
a). Exhausting air pressure from service brake chambers.
d). All the choices are correct.
c). Supplying air chambers with air during braking events.
18
A lateral acceleration sensor or "G" sensor, is a system input sensor used by the:
b). Automatic Traction Control (ATC) system.
d). Directional Stability Control (DSC) system
c). Roll Stability Control (RSC) system
a). ABS system
19
ABS modulator valves contain:
c). Only an electrically controlled exhaust valve.
d). A normally closed inlet and exhaust valve.
b). Only an electrically controlled air inlet valve.
a). An electrically controlled inlet and exhaust valve.
20
Traction control systems minimize wheel slip by:
d). Selectively braking wheels and reducing engine power.
c). Modulating brake pressure to wheels with traction.
b). Selectively applying brakes to slipping/spinning wheels.
a). Reducing engine power when the wheels spin.
