ASE BRAKES T4 PRACTICE TEST #1
Which09of09the09following09could09cause09the09brakes09on09a09truck09to09wear09too09f
ast?
A.09Glazed09Drums
B.09Wrong09linings09installed
C.09Low09air09pressure09in09the09service09tanks
D.09Governor09cut-out09pressure09too09high09-09ans--
✔✔Answer09A09is09incorrect.09Glazed09drum09linings09are09hard09and09do09not09wear.
09They09also09do09not09stop09the09truck.
Answer09B09is09correct.09The09wrong09lining09for09the09application09may09be09the09pro
blem.09
Answer09C09is09incorrect.09Low09air09pressure09in09the09tanks09would09not09cause09br
ake09wear.09It09may09cause09a09low09amount09of09reserve09air09in09case09of09multiple
09brake09applications.
Answer09D09is09incorrect.09High09governor09cut=out09pressure09may09cause09the09saf
ety09valve09to09open,09but09would09not09cause09the09brakes09to09wear09too09fast.
Which09of09the09following09could09case09one09brake09on09a09truck09to09wear09faster09t
han09the09others?
A.09Mismatched09service09brake09chambers
B.09Mismatched09parking09brake09chambers
C.09Low09air09pressure09in09the09service09tanks
D.09Governor09cut-out09pressure09too09low09-09ans--
✔✔Answer09A09is09correct.09Mismatched09brake09service09chambers09would09apply09
unequal09brake09application09pressure09from09side09to09side,09which09would09cause09
one09brake09to09wear09faster.
Answer09B09is09incorrect.09Mismatched09parking09brake09chambers09would09not09caus
e09brake09wear.09It09would09possibly09allow09the09brake09to09roll09when09parked,09bec
ause09one09side09could09have09insufficient09parking09brake09application.
Answer09C09is09incorrect.09Low09air09pressure09in09the09tanks09would09not09cause09br
ake09wear.09It09may09cause09a09low09amount09of09reserve09air09in09case09of09multiple
09brake09applications
Answer09D09is09incorrect.09Low09governor09cut-
out09pressure09may09cause09an09inadequate09amount09of09air09in09reserve09but09woul
d09not09cause09the09brake09to09wear09too09fast.
There09is09an09audible09air09leak09from09under09the09dash09when09the09foot09valve09is
09applied.09Technician09A09says09the09double-
,check09valve09may09be09faulty.09Technician09B09says09the09single-
check09valve09may09be
faulty.09Who09is09correct?09-09ans--✔✔A.09A09only
B.09B09only
C.09Both09A09and09B
D.09Neither09A09nor09B
Answer09A09is09correct.09A09leaking09double09check09valve09could09allow09air09to09flo
w09to09the09foot09valve09and09out09the09open09exhaust
Answer09B09is09incorrect.09Single09check09valves09are09used09to09protect09the09tanks.
09They09do09not09cause09an09air09leak09when09the09brakes09are09applied.
Answer09C09is09incorrect.09Technician09B09is09incorrect.
Answer09D09is09incorrect.09Technician09A09is09correct.
On09a09straight09truck09equipped09with09air09brakes,09the09secondary09tank09pressure
09gauge09falls09to09zero09when09she09wet09air09tank09is09drained.09Technician09A09say
s09the09one-way09check09valve09may09be09faulty.
Technician09B09says09the09foor09valve09may09be09faulty.09Who09is09correct?
A.09A09only
B.09B09only
C.09Both09A09and09B
D.09Neither09A09nor09B09-09ans--
✔✔Answer09A09is09correct.09The09one09way09check09valve09should09protect09the09sec
ondary09tank.09The09check09valve09is09leaking.
Answer09B09is09incorrect.09The09foot09valve09does09not09separate09the09wet09and09se
condary09tanks.
Answer09C09is09incorrect.09Technician09B09is09incorrect.
Answer09D09is09incorrect.09Technician09A09is09correct.
Which09of09the09following09could09set09an09antilock09braking09system09(ABS)09wheel09
speed09sensor09code:
A.09Faulty09modulator09hold09solenoid
B.09Faulty09modulator09release09solenoid
C.09Incorrect09wheel09bearing09adjustment
D.09Incorrect09brake09adjustment09-09ans--
✔✔Answer09A09is09incorrect.09A09faulty09solenoid09would09not09cause09a09wheel09spe
ed09sensor09code.09It09could09cause09a09modulator09valve09code.
Answer09B09is09incorrect.09A09faulty09solenoid09would09not09cause09a09wheel09speed0
9sensor09code.09It09could09cause09a09modulator09valve09code
Answer09C09is09correct.09A09loose09wheel09bearing09adjustment09can09cause09a09fault
y09wheel09speed09sensor09and09a09wheel09speed09sensor09code.
Answer09D09is09incorrect.09An09incorrect09brake09adjustment09may09cause09a09draggin
g09brake09but09would09not09cause09a09wheel09speed09sensor09code
The09air09drier09purged09too09often.09Technician09A09says09the09air09drier09delivery09c
heck09valve09may09be09leaking.09Technician09B09says09a09leaking09wet09tank09could09
be09the09cause.09Who09is09correct?
, A.09A09only
B.09B09only
C.09Both09A09and09B
D.09Neither09A09nor09B09-09ans--
✔✔Answer09A09is09incorrect.09Technician09B09is09also09correct.
Answer09B09is09incorrect.09Technician09A09is09also09correct.
Answer09C09is09correct.09A09leaking09air09drier09check09valve09will09allow09the09wet09t
ank09to09drain09back09through09the09air09drier.09This09will09cause09air09pressure09to09d
rop09to09governor09cut-
in09rapidly.09The09air09compressor09will09again09build09tank09pressure09and09unload,09
and09the09sequence09will09start09over.09A09leaking09wet09tank09will09cause09the09air09
pressure09to09fall09rapidly09and09the09compressor09to09build09air09again09and09then09c
ut09out.09This09too09will09cause09the09air09drier09to09purge09often.
Answer09D09is09incorrect.09Both09technicians09are09correct.
The09safety09valve09releases09on09the09air09tank.09Which09of09the09following09is09the09
most09likely09cause?
A.09Plugged09line09from09the09supply09tank09to09the09governor
B.09Faulty09tractor09protection09valve
C.09Stuck09spitter09on09the09air09drier
D.09Faulty09secondary09tank09-09ans--
✔✔Answer09A09is09correct.09If09the09line09from09the09supply09tank09to09the09governor0
9were09plugged09the09governor09would09not09unload09the09compressor.
Answer09B09is09incorrect.09The09tractor09protection09valve09could09not09cause09excess
ive09pressure.
Answer09C09is09incorrect.09A09stuck09spitter09would09prevent09the09air09drier09from09p
urging.
Answer09D09is09incorrect.09A09faulty09secondary09tank09could09leak,09but09that09would
09not09cause09excessive09air09pressure.
A09truck09with09hydraulic09disc/
drum09brakes09has09a09high09firm09pedal09with09poor09stopping.09Which09of09the09follo
wing09could09be09the09cause?
A.09The09brakes09are09adjusted09too09loose.
B.09The09brake09linings09are09glazed.
C.09The09brake09pedal09pushrod09is09too09long.
D.09The09driveline09parking09brake09is09misadjusted.09-09ans--
✔✔Answer09A09is09incorrect.09If09drum09brakes09are09adjusted09too09loose09the09peda
l09will09be09low09because09the09pedal09will09need09to09travel09farther09to09take09up09th
e09clearance.
Answer09B09is09correct.09Glazed09brake09linings09will09not09create09the09friction09need
ed09to09stop09the09truck09but09will09allow09the09pedal09to09feel09high09and09firm.
Answer09C09is09incorrect.09A09pushrod09that09is09too09long09would09cause09the09brake
s09to09drag.
Answer09D09is09incorrect.09The09driveline09parking09brake09adjustment09would09not09c
ause09a09low09pedal.09It09is09not09connected09to09the09service09brakes.
Which09of09the09following09could09cause09the09brakes09on09a09truck09to09wear09too09f
ast?
A.09Glazed09Drums
B.09Wrong09linings09installed
C.09Low09air09pressure09in09the09service09tanks
D.09Governor09cut-out09pressure09too09high09-09ans--
✔✔Answer09A09is09incorrect.09Glazed09drum09linings09are09hard09and09do09not09wear.
09They09also09do09not09stop09the09truck.
Answer09B09is09correct.09The09wrong09lining09for09the09application09may09be09the09pro
blem.09
Answer09C09is09incorrect.09Low09air09pressure09in09the09tanks09would09not09cause09br
ake09wear.09It09may09cause09a09low09amount09of09reserve09air09in09case09of09multiple
09brake09applications.
Answer09D09is09incorrect.09High09governor09cut=out09pressure09may09cause09the09saf
ety09valve09to09open,09but09would09not09cause09the09brakes09to09wear09too09fast.
Which09of09the09following09could09case09one09brake09on09a09truck09to09wear09faster09t
han09the09others?
A.09Mismatched09service09brake09chambers
B.09Mismatched09parking09brake09chambers
C.09Low09air09pressure09in09the09service09tanks
D.09Governor09cut-out09pressure09too09low09-09ans--
✔✔Answer09A09is09correct.09Mismatched09brake09service09chambers09would09apply09
unequal09brake09application09pressure09from09side09to09side,09which09would09cause09
one09brake09to09wear09faster.
Answer09B09is09incorrect.09Mismatched09parking09brake09chambers09would09not09caus
e09brake09wear.09It09would09possibly09allow09the09brake09to09roll09when09parked,09bec
ause09one09side09could09have09insufficient09parking09brake09application.
Answer09C09is09incorrect.09Low09air09pressure09in09the09tanks09would09not09cause09br
ake09wear.09It09may09cause09a09low09amount09of09reserve09air09in09case09of09multiple
09brake09applications
Answer09D09is09incorrect.09Low09governor09cut-
out09pressure09may09cause09an09inadequate09amount09of09air09in09reserve09but09woul
d09not09cause09the09brake09to09wear09too09fast.
There09is09an09audible09air09leak09from09under09the09dash09when09the09foot09valve09is
09applied.09Technician09A09says09the09double-
,check09valve09may09be09faulty.09Technician09B09says09the09single-
check09valve09may09be
faulty.09Who09is09correct?09-09ans--✔✔A.09A09only
B.09B09only
C.09Both09A09and09B
D.09Neither09A09nor09B
Answer09A09is09correct.09A09leaking09double09check09valve09could09allow09air09to09flo
w09to09the09foot09valve09and09out09the09open09exhaust
Answer09B09is09incorrect.09Single09check09valves09are09used09to09protect09the09tanks.
09They09do09not09cause09an09air09leak09when09the09brakes09are09applied.
Answer09C09is09incorrect.09Technician09B09is09incorrect.
Answer09D09is09incorrect.09Technician09A09is09correct.
On09a09straight09truck09equipped09with09air09brakes,09the09secondary09tank09pressure
09gauge09falls09to09zero09when09she09wet09air09tank09is09drained.09Technician09A09say
s09the09one-way09check09valve09may09be09faulty.
Technician09B09says09the09foor09valve09may09be09faulty.09Who09is09correct?
A.09A09only
B.09B09only
C.09Both09A09and09B
D.09Neither09A09nor09B09-09ans--
✔✔Answer09A09is09correct.09The09one09way09check09valve09should09protect09the09sec
ondary09tank.09The09check09valve09is09leaking.
Answer09B09is09incorrect.09The09foot09valve09does09not09separate09the09wet09and09se
condary09tanks.
Answer09C09is09incorrect.09Technician09B09is09incorrect.
Answer09D09is09incorrect.09Technician09A09is09correct.
Which09of09the09following09could09set09an09antilock09braking09system09(ABS)09wheel09
speed09sensor09code:
A.09Faulty09modulator09hold09solenoid
B.09Faulty09modulator09release09solenoid
C.09Incorrect09wheel09bearing09adjustment
D.09Incorrect09brake09adjustment09-09ans--
✔✔Answer09A09is09incorrect.09A09faulty09solenoid09would09not09cause09a09wheel09spe
ed09sensor09code.09It09could09cause09a09modulator09valve09code.
Answer09B09is09incorrect.09A09faulty09solenoid09would09not09cause09a09wheel09speed0
9sensor09code.09It09could09cause09a09modulator09valve09code
Answer09C09is09correct.09A09loose09wheel09bearing09adjustment09can09cause09a09fault
y09wheel09speed09sensor09and09a09wheel09speed09sensor09code.
Answer09D09is09incorrect.09An09incorrect09brake09adjustment09may09cause09a09draggin
g09brake09but09would09not09cause09a09wheel09speed09sensor09code
The09air09drier09purged09too09often.09Technician09A09says09the09air09drier09delivery09c
heck09valve09may09be09leaking.09Technician09B09says09a09leaking09wet09tank09could09
be09the09cause.09Who09is09correct?
, A.09A09only
B.09B09only
C.09Both09A09and09B
D.09Neither09A09nor09B09-09ans--
✔✔Answer09A09is09incorrect.09Technician09B09is09also09correct.
Answer09B09is09incorrect.09Technician09A09is09also09correct.
Answer09C09is09correct.09A09leaking09air09drier09check09valve09will09allow09the09wet09t
ank09to09drain09back09through09the09air09drier.09This09will09cause09air09pressure09to09d
rop09to09governor09cut-
in09rapidly.09The09air09compressor09will09again09build09tank09pressure09and09unload,09
and09the09sequence09will09start09over.09A09leaking09wet09tank09will09cause09the09air09
pressure09to09fall09rapidly09and09the09compressor09to09build09air09again09and09then09c
ut09out.09This09too09will09cause09the09air09drier09to09purge09often.
Answer09D09is09incorrect.09Both09technicians09are09correct.
The09safety09valve09releases09on09the09air09tank.09Which09of09the09following09is09the09
most09likely09cause?
A.09Plugged09line09from09the09supply09tank09to09the09governor
B.09Faulty09tractor09protection09valve
C.09Stuck09spitter09on09the09air09drier
D.09Faulty09secondary09tank09-09ans--
✔✔Answer09A09is09correct.09If09the09line09from09the09supply09tank09to09the09governor0
9were09plugged09the09governor09would09not09unload09the09compressor.
Answer09B09is09incorrect.09The09tractor09protection09valve09could09not09cause09excess
ive09pressure.
Answer09C09is09incorrect.09A09stuck09spitter09would09prevent09the09air09drier09from09p
urging.
Answer09D09is09incorrect.09A09faulty09secondary09tank09could09leak,09but09that09would
09not09cause09excessive09air09pressure.
A09truck09with09hydraulic09disc/
drum09brakes09has09a09high09firm09pedal09with09poor09stopping.09Which09of09the09follo
wing09could09be09the09cause?
A.09The09brakes09are09adjusted09too09loose.
B.09The09brake09linings09are09glazed.
C.09The09brake09pedal09pushrod09is09too09long.
D.09The09driveline09parking09brake09is09misadjusted.09-09ans--
✔✔Answer09A09is09incorrect.09If09drum09brakes09are09adjusted09too09loose09the09peda
l09will09be09low09because09the09pedal09will09need09to09travel09farther09to09take09up09th
e09clearance.
Answer09B09is09correct.09Glazed09brake09linings09will09not09create09the09friction09need
ed09to09stop09the09truck09but09will09allow09the09pedal09to09feel09high09and09firm.
Answer09C09is09incorrect.09A09pushrod09that09is09too09long09would09cause09the09brake
s09to09drag.
Answer09D09is09incorrect.09The09driveline09parking09brake09adjustment09would09not09c
ause09a09low09pedal.09It09is09not09connected09to09the09service09brakes.
