CDL - Combination Vehicle Practice Test
2025/2026 Exam Questions Marking
Scheme New Update | A+ Rated
A tractor with a(n) ________ trailer requires the shortest amount of
stopping distance .
1. empty
2. fully loaded
3. lightly loaded - 🧠 ANSWER ✔✔fully loaded
The air leakage rate for a combination vehicle ( engine off, brakes on)
should not be more than _____ psi per minute .
1. 4
2. 6
3. 2 - 🧠 ANSWER ✔✔4
If you do not do the final air brake check for air leaks and fix them before
driving,
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, 1. you could lose your brakes while driving
2. your fuel usage will increase
3. tire pressure will drop - 🧠 ANSWER ✔✔you could lose your brakes while
driving
Which part of the kingpin should the locking jaws close around? - 🧠
ANSWER ✔✔The shank
Glad hands are used to connect the ....
1. kingpin from the trailer to the locking jaws of the fifth wheel
2. electrical lines from the tractor to the trailer
3. service and emergency air lines from the truck or tractor to the trailer - 🧠
ANSWER ✔✔service and emergency air lines from the truck or tractor to
the trailer
Trucks roll over more easily when fully loaded and are
1. ten times more likely to roll over in a crash than empty rigs
2. five times more likely to roll over in a crash than empty rigs
3. two times more likely to roll over in a crash than empty rigs - 🧠 ANSWER
✔✔ten times more likely to roll over in a crash than empty rigs
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
2
PRIVACY STATEMENT. ALL RIGHTS RESERVED
2025/2026 Exam Questions Marking
Scheme New Update | A+ Rated
A tractor with a(n) ________ trailer requires the shortest amount of
stopping distance .
1. empty
2. fully loaded
3. lightly loaded - 🧠 ANSWER ✔✔fully loaded
The air leakage rate for a combination vehicle ( engine off, brakes on)
should not be more than _____ psi per minute .
1. 4
2. 6
3. 2 - 🧠 ANSWER ✔✔4
If you do not do the final air brake check for air leaks and fix them before
driving,
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, 1. you could lose your brakes while driving
2. your fuel usage will increase
3. tire pressure will drop - 🧠 ANSWER ✔✔you could lose your brakes while
driving
Which part of the kingpin should the locking jaws close around? - 🧠
ANSWER ✔✔The shank
Glad hands are used to connect the ....
1. kingpin from the trailer to the locking jaws of the fifth wheel
2. electrical lines from the tractor to the trailer
3. service and emergency air lines from the truck or tractor to the trailer - 🧠
ANSWER ✔✔service and emergency air lines from the truck or tractor to
the trailer
Trucks roll over more easily when fully loaded and are
1. ten times more likely to roll over in a crash than empty rigs
2. five times more likely to roll over in a crash than empty rigs
3. two times more likely to roll over in a crash than empty rigs - 🧠 ANSWER
✔✔ten times more likely to roll over in a crash than empty rigs
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
2
PRIVACY STATEMENT. ALL RIGHTS RESERVED
