CDL - COMBINATION VEHICLE PRACTICE TEST QUESTIONS WITH CORRECT ANSWERS 2026

CDL - COMBINATION VEHICLE PRACTICE
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TEST QUESTIONS WITH CORRECT
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ANSWERS 2025 gh




A g h tractor g h with g h a(n) g h trailer g h requires g h the g h shortest g h amount g h of g h stopping g h distance
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1. empty

2. fully g h loaded

3. lightly g h loaded g h - g h CORRECT g h ANSWER-fully g h loaded



The g h air g h leakage g h rate g h for g h a g h combination g h vehicle g h ( g h engine g h off, g h brakes g h on) g h should
g h not g h be g h more g h t ghhan g h psi g h per g h minute g h .

1. g h 4

2. g h 6

3. g h 2 g h - g h CORRECT g h ANSWER-4



If g h you g h do g h not g h do g h the g h final g h air g h brake g h check g h for g h air g h leaks g h and g h fix g h them g h before
g h driving,



1. you g h could g h lose g h your g h brakes g h while g h driving

2. your g h fuel g h usage g h will g h increase

3. tire g h pressure g h will g h drop g h - g h CORRECT g h ANSWER-you g h could g h lose g h your g h brakes g h while
g h driving




Which g h part g h of g h the g h kingpin g h should g h the g h locking g h jaws g h close g h around? g h -
g h CORRECT g h ANSWER- ghThe g h shank




Glad g h hands g h are g h used g h to g h connect g h the g h ....

1. kingpin g h from g h the g h trailer g h to g h the g h locking g h jaws g h of g h the g h fifth g h wheel

2. electrical g h lines g h from g h the g h tractor g h to g h the g h trailer

, 3. service g h and g h emergency g h air g h lines g h from g h the g h truck g h or g h tractor g h to g h the g h trailer g h -
CORRECT g h ANSWER-service g h and g h emergency g h air g h lines g h from g h the g h truck g h or g h tractor g h to
g h the g h trailer




Trucks g h roll g h over g h more g h easily g h when g h fully g h loaded g h and g h are

1. ten g h times g h more g h likely g h to g h roll g h over g h in g h a g h crash g h than g h empty g h rigs

2. five g h times g h more g h likely g h to g h roll g h over g h in g h a g h crash g h than g h empty g h rigs

3. two g h times g h more g h likely g h to g h roll g h over g h in g h a g h crash g h than g h empty g h rigs g h -
g h CORRECT g h ANSWER- ghten g h times g h more g h likely g h to g h roll g h over g h in g h a g h crash


g h than g h empty g h rigs




In g h general, g h the g h higher g h your g h trucks g h center g h of g h gravity, g h the g h ...

1. easier g h it g h is g h to g h turn g h over

2. more g h stable g h it g h is g h when g h turning

3. easier g h it g h is g h to g h turn g h around g h corners g h - g h CORRECT g h ANSWER-easier g h it g h is g h to g h turn
g h over




You g h are g h driving g h a g h combination g h vehicle g h when g h the g h trailer g h breaks g h away, g h pulling
g h apart g h both g h air g h li ghnes. g h You g h would g h expect g h the g h trailer g h brakes g h to g h come g h on


g h and g h ...



1. the g h tractor g h to g h lose g h all g h air g h pressure

2. the g h tractor g h protection g h valve g h to g h close

3. the g h trailer ghsupply g h valve g h to g h stay g h open g h - g h CORRECT
g h ANSWER- ghthe g h tractor g h protection g h valve g h to g h close




When g h you g h drive g h a g h set g h of g h doubles, g h which g h shut-off g h valve g h must g h be g h closed g h in g h the
g h last g h trailer?



1. Middle g h section

2. front g h section

3. back g h section g h - g h CORRECT g h ANSWER-back g h section