CAT 793D/793B TRUCK HAULAGE
OPERATOR EXAM QUESTIONS AND
ANSWERS
What ashould ayou ado aif ayou aobserve aany ahazardous aconditions ain athe amine?
A. aReport ato asupervisor aas asoon aas apossible.
B. aSpace acall asafety aoffice awhen aI aget ahome. a
C. aIgnore ait abecause athe asupervisor awill asee ait.
D. aWrite ait adown aon athe aoperator achecklist. a- a✔✔A. aReport ato ayour asupervisor aas
asoon aas apossible.
When ashould ayou areport ainjuries aaccident aor aequipment adamage? a
A. aOnly aif aI'm acaught.
B. aIt ais anot anecessary aunless athe adamage ais amore athan a$500.
C. aAs asoon aas apossible.
D. aAnd athe aend aof ashift. a- a✔✔C. aAs asoon aas apossible.
What asafety aequipment adoes anot aneed ato abe aworn aat aall atimes awhen aoperating aa
a793B/D amodel ahaul atruck?
A. aSafety ashoes.
B. aSafety aglasses.
C. aHardhat.
D. aNone aof athe aabove. a- a✔✔C. aHardhat
How adoes athe aretarder aon aa acat atruck aslow adown athe atruck?
A. aIt arubs aon athe atorque aconverter acausing ait ato aslow adown. a
B. ait auses asprings ato acompress abrake apads ain athe awheel.
C. aUses aair aover aoil apressure ato acompress adisc aand aplates ain athe awheel
D. aThe aretarder auses aengine acompression ato aslow athe aspeed aof athe atruck. a-
a✔✔C. aIt auses aair aover aoil, apressure ato acompress adiscs aand aplates ain athe awheel.
What ais athe adifference abetween aa aretarder aand aa aservice abrake aon aa acat atruck?
A. aThere ais ano adifference.
B. aWhen auses aoil apressure athe aother ause aair apressure. a
C. aThe aretarder auses a80% apsi amaximum aand athe aservice abrake auses aa amaximum
aof a100% aof athe aair aavailable aair apressure.
D. aOnly aa amechanic acan atell athe adifference awhen ahe atears ait aapart. a- a✔✔C. aThe
aretarder auses a80% apsi amaximum aand athe aservice abreaks auses aa amaximum aof
a100% aof athe aavailable aair apressure.
,Why ais ait aimportant anot ato astraddle arocks awhile atraveling?
A. aYou acould arun ait aover aand ablue aor acut aa atire.
B. aIt's aOK aif ayou aknow awhere athe acenter aof ayour atruck ais.
C. aYou acould adrag ait ato athe adump awith ayou.
D. aIt's aOK awe ado ait aevery aday. a- a✔✔A. aYou acould arun ait aover aand ablow aor acut
aa atire.
The aair atank alocated abehind athe apanel aon athe arear acab asupplies aair ato awhich
abrakes?
A. aThe aservice abrake aand aretarder abrakes.
B. aThe apark abrake aand asecondary abrake.
C. athe atransmission aand aservice abrake. a
D. aIt areleases athe aretarder aand athe aservice abreak. a- a✔✔B. aThe apark abrake aand
asecondary abreak.
What ais athe adifference abetween athe asecondary abrake ain athe aservice abrake? a
A. aThere ais ano adifference.
B. aOnly amechanic acan atell. a
C. aThe asecondary ais aSpring aapplied aand athe aservice ais aair aover aoil aapplied.
D. aThe aservice abrake ais aused afirst aand athen athe asecondary ais aused. a- a✔✔C. aThe
asecondary ais aSpring aapplied ain athe aservice ais aair aover aoil aapplied.
Which astatement ais anot aa apart aof atesting aa aretarder aon aa acat atruck?
A. aPull aretarder aall athe away adown aand ahold?
B. aRelease aall aother abreaks.
C. aAccelerate ato a1500 aRPM.
D. aHonk ahorn atwice abefore aputting ain agear. a- a✔✔C. aAccelerate ato a1500 aRPM.
Which astatement ais anot apart aof atesting athe aservice abrake aon aa acat atruck?
A. aAccelerate ato a1200 aRPM.
B. aRelease aall aother abreaks.
C. aPlace atruck aon aramp.
D. aHonk ahorn atwice abefore aputting ain agear. a- a✔✔C. aPlace atruck aon aa aramp.
Which astatement ais anot apart aof atesting asecondary abrake aon aa acat atruck?
A. aPull athe asecondary alever aall athe away adown aand ahold.
B. aRelease aall aother abreaks.
C. aAccelerate ato a1200 aRPM.
D. aTurn aAETA atest aswitch aon. a- a✔✔D. aTurn aAETA atest aswitch aon
How amuch aair apressure ais anormally aindicated aon athe aair apressure agauge awhen
ayou aoperate aa acat atruck?
A. a120.
B. a140.
C. a135.
D. a90. a- a✔✔A. a120.
, Why ais ait aimportant ato ause athe amanual aretarder? a
A. aIt's aeasier ato aregulate.
B. aIt's amore aaccurate athan athe aservice abrake.
C. aThe abrakes arun acooler.
D. aAll aof athe aabove. a- a✔✔D. aAll aof athe aabove.
How ado ayou averify aif ayour asteering ais alow?
A. aThe atruck ais aon alevel aground. a
B. aShut athe atruck aoff afrom athe acab. aWait auntil aaccumulators ahave abled aoff
C. aCheck athe atop asight aglass
D. aAll aof athe aabove. a- a✔✔D. aAll aof athe aabove.
Why ashould aa aretarder anot abe aused aas aa aPark abreak? a
A. aIt acould avibrate aoff aand aallow athe atruck ato aroll
B. aIt adoesn't awork abelow a3 amph.
C. aIt auses a80% aPSI amaximum, awhich awill anot ahold athe atruck aon aan aincline.
D. aAll aof athe aabove. a- a✔✔A. aIt acould avibrate aoff aand aallow athe atruck ato aroll.
In athe aevent aof aan aemergency ain athe apit, awhich aof athe afollowing ais aincorrect? a
A. aSay a" amayday aMayday aMayday"
B. aRadio asilence awill abe ain aeffect aimmediate.
C. aGive adispatch aor aimmediate asupervisor athe aexact alocation aof athe aaccident aand
aother acritical ainformation aas aneeded asuch aas anames aand atruck anumbers.
D. aAll aoperations atraffic amust astop a- a✔✔C. aGive adispatch aor aimmediate
asupervisor, athe aexact alocation aof athe aaccident aand aother acritical ainformation aas
aneeded asuch aas anames ain atruck anumbers.
If athe abrake aoil atemperature ais arising, awhat aaction ashould ayou atake?
A. aRelease aall abrakes aand acoast ain aneutral auntil athe atemperature agoes adown.
B. aBO athe atruck.
C. aReport ait ato adispatch. a
D. aPut athe atruck ain aa alower agear aor astop aand aroad athe aengine ato a1500 aRPM ain
aneutral. a- a✔✔D. aPut athe atruck ain aa alower agear aor astump aand arub athe aengine ato
a1500 aRPM ain aneutral.
Is athe aAETA asystem atest aswitch aa adifferential alock? a
A. aYes.
B. aNo.
C. aSometimes.
D. aOnly awhen ait's aslippery. a- a✔✔B. aNo.
What ais athe apurpose aof athe asteering aaccumulators?
A. aTo aprovide aemergency asteering apressure.
B. aDampen athe asteering.
C. aPreventing awheel afrom ajerking, awhen ahitting aa abump. a
OPERATOR EXAM QUESTIONS AND
ANSWERS
What ashould ayou ado aif ayou aobserve aany ahazardous aconditions ain athe amine?
A. aReport ato asupervisor aas asoon aas apossible.
B. aSpace acall asafety aoffice awhen aI aget ahome. a
C. aIgnore ait abecause athe asupervisor awill asee ait.
D. aWrite ait adown aon athe aoperator achecklist. a- a✔✔A. aReport ato ayour asupervisor aas
asoon aas apossible.
When ashould ayou areport ainjuries aaccident aor aequipment adamage? a
A. aOnly aif aI'm acaught.
B. aIt ais anot anecessary aunless athe adamage ais amore athan a$500.
C. aAs asoon aas apossible.
D. aAnd athe aend aof ashift. a- a✔✔C. aAs asoon aas apossible.
What asafety aequipment adoes anot aneed ato abe aworn aat aall atimes awhen aoperating aa
a793B/D amodel ahaul atruck?
A. aSafety ashoes.
B. aSafety aglasses.
C. aHardhat.
D. aNone aof athe aabove. a- a✔✔C. aHardhat
How adoes athe aretarder aon aa acat atruck aslow adown athe atruck?
A. aIt arubs aon athe atorque aconverter acausing ait ato aslow adown. a
B. ait auses asprings ato acompress abrake apads ain athe awheel.
C. aUses aair aover aoil apressure ato acompress adisc aand aplates ain athe awheel
D. aThe aretarder auses aengine acompression ato aslow athe aspeed aof athe atruck. a-
a✔✔C. aIt auses aair aover aoil, apressure ato acompress adiscs aand aplates ain athe awheel.
What ais athe adifference abetween aa aretarder aand aa aservice abrake aon aa acat atruck?
A. aThere ais ano adifference.
B. aWhen auses aoil apressure athe aother ause aair apressure. a
C. aThe aretarder auses a80% apsi amaximum aand athe aservice abrake auses aa amaximum
aof a100% aof athe aair aavailable aair apressure.
D. aOnly aa amechanic acan atell athe adifference awhen ahe atears ait aapart. a- a✔✔C. aThe
aretarder auses a80% apsi amaximum aand athe aservice abreaks auses aa amaximum aof
a100% aof athe aavailable aair apressure.
,Why ais ait aimportant anot ato astraddle arocks awhile atraveling?
A. aYou acould arun ait aover aand ablue aor acut aa atire.
B. aIt's aOK aif ayou aknow awhere athe acenter aof ayour atruck ais.
C. aYou acould adrag ait ato athe adump awith ayou.
D. aIt's aOK awe ado ait aevery aday. a- a✔✔A. aYou acould arun ait aover aand ablow aor acut
aa atire.
The aair atank alocated abehind athe apanel aon athe arear acab asupplies aair ato awhich
abrakes?
A. aThe aservice abrake aand aretarder abrakes.
B. aThe apark abrake aand asecondary abrake.
C. athe atransmission aand aservice abrake. a
D. aIt areleases athe aretarder aand athe aservice abreak. a- a✔✔B. aThe apark abrake aand
asecondary abreak.
What ais athe adifference abetween athe asecondary abrake ain athe aservice abrake? a
A. aThere ais ano adifference.
B. aOnly amechanic acan atell. a
C. aThe asecondary ais aSpring aapplied aand athe aservice ais aair aover aoil aapplied.
D. aThe aservice abrake ais aused afirst aand athen athe asecondary ais aused. a- a✔✔C. aThe
asecondary ais aSpring aapplied ain athe aservice ais aair aover aoil aapplied.
Which astatement ais anot aa apart aof atesting aa aretarder aon aa acat atruck?
A. aPull aretarder aall athe away adown aand ahold?
B. aRelease aall aother abreaks.
C. aAccelerate ato a1500 aRPM.
D. aHonk ahorn atwice abefore aputting ain agear. a- a✔✔C. aAccelerate ato a1500 aRPM.
Which astatement ais anot apart aof atesting athe aservice abrake aon aa acat atruck?
A. aAccelerate ato a1200 aRPM.
B. aRelease aall aother abreaks.
C. aPlace atruck aon aramp.
D. aHonk ahorn atwice abefore aputting ain agear. a- a✔✔C. aPlace atruck aon aa aramp.
Which astatement ais anot apart aof atesting asecondary abrake aon aa acat atruck?
A. aPull athe asecondary alever aall athe away adown aand ahold.
B. aRelease aall aother abreaks.
C. aAccelerate ato a1200 aRPM.
D. aTurn aAETA atest aswitch aon. a- a✔✔D. aTurn aAETA atest aswitch aon
How amuch aair apressure ais anormally aindicated aon athe aair apressure agauge awhen
ayou aoperate aa acat atruck?
A. a120.
B. a140.
C. a135.
D. a90. a- a✔✔A. a120.
, Why ais ait aimportant ato ause athe amanual aretarder? a
A. aIt's aeasier ato aregulate.
B. aIt's amore aaccurate athan athe aservice abrake.
C. aThe abrakes arun acooler.
D. aAll aof athe aabove. a- a✔✔D. aAll aof athe aabove.
How ado ayou averify aif ayour asteering ais alow?
A. aThe atruck ais aon alevel aground. a
B. aShut athe atruck aoff afrom athe acab. aWait auntil aaccumulators ahave abled aoff
C. aCheck athe atop asight aglass
D. aAll aof athe aabove. a- a✔✔D. aAll aof athe aabove.
Why ashould aa aretarder anot abe aused aas aa aPark abreak? a
A. aIt acould avibrate aoff aand aallow athe atruck ato aroll
B. aIt adoesn't awork abelow a3 amph.
C. aIt auses a80% aPSI amaximum, awhich awill anot ahold athe atruck aon aan aincline.
D. aAll aof athe aabove. a- a✔✔A. aIt acould avibrate aoff aand aallow athe atruck ato aroll.
In athe aevent aof aan aemergency ain athe apit, awhich aof athe afollowing ais aincorrect? a
A. aSay a" amayday aMayday aMayday"
B. aRadio asilence awill abe ain aeffect aimmediate.
C. aGive adispatch aor aimmediate asupervisor athe aexact alocation aof athe aaccident aand
aother acritical ainformation aas aneeded asuch aas anames aand atruck anumbers.
D. aAll aoperations atraffic amust astop a- a✔✔C. aGive adispatch aor aimmediate
asupervisor, athe aexact alocation aof athe aaccident aand aother acritical ainformation aas
aneeded asuch aas anames ain atruck anumbers.
If athe abrake aoil atemperature ais arising, awhat aaction ashould ayou atake?
A. aRelease aall abrakes aand acoast ain aneutral auntil athe atemperature agoes adown.
B. aBO athe atruck.
C. aReport ait ato adispatch. a
D. aPut athe atruck ain aa alower agear aor astop aand aroad athe aengine ato a1500 aRPM ain
aneutral. a- a✔✔D. aPut athe atruck ain aa alower agear aor astump aand arub athe aengine ato
a1500 aRPM ain aneutral.
Is athe aAETA asystem atest aswitch aa adifferential alock? a
A. aYes.
B. aNo.
C. aSometimes.
D. aOnly awhen ait's aslippery. a- a✔✔B. aNo.
What ais athe apurpose aof athe asteering aaccumulators?
A. aTo aprovide aemergency asteering apressure.
B. aDampen athe asteering.
C. aPreventing awheel afrom ajerking, awhen ahitting aa abump. a
