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Missouri Class A CDL Exam Practice Questions Complete
(Verified Updated!!!!2026–2027)
Exam Blueprint Overview
A Missouri Class A CDL allows you to operate any combination
of vehicles with a Gross Combination Weight Rating (GCWR) of
26,001 pounds or more, provided the Gross Vehicle Weight
Rating (GVWR) of the vehicle(s) being towed exceeds 10,000
pounds. This is the license required for tractor-trailers, big rigs,
and most heavy hauling.
Test Component Details
General Knowledge Test 50 questions; need 40 correct (80%) to pass
Combination Vehicles Test 20 questions; need 16 correct (80%) to pass
Air Brakes Test 25 questions; need 20 correct (80%) to pass
Endorsement Tests Varies by endorsement (HazMat, Tanker, Doubles/Triples, Passenger)
Required Tests for Class A: Basic Knowledge Test, Combination
Vehicle Test, and Air Brakes Test (if applicable).
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Class A Endorsements: Hazardous Materials (H), Tank Vehicles
(N), Tank Vehicles Transporting Hazardous Materials (X),
Passenger Transport (P), School Bus (S), Doubles/Triples (T).
SECTION 1: GENERAL KNOWLEDGE (Questions)
Vehicle Inspection & Basic Control
1. What is the most important reason to inspect your truck or
bus before driving?
A) To check the battery fluid level
B) To check the amount of fuel in the vehicle
C) Safety for yourself and others
D) To check the tire pressure
Correct Answer: C
Rationale: The most important reason for a pre-trip inspection
is safety. A pre-trip inspection helps you find problems that
could cause a crash, breakdown, or fire. Safety for yourself, your
passengers, and other motorists is the primary concern.
2. A Class A pre-trip inspection should take at minimum:
A) 5 minutes
B) 15 minutes
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C) 30 minutes
D) 60 minutes
Correct Answer: B
Rationale: A thorough pre-trip inspection should take at least
15 minutes to complete properly. Rushing through the
inspection increases the risk of missing critical safety defects.
3. Which of the following is checked in a pre-trip inspection?
A) Wiper blades
B) Steering wheel
C) All of the above
D) None of the above
Correct Answer: C
Rationale: A pre-trip inspection includes checking wiper blades,
the steering wheel, and many other components including tires,
brakes, lights, fluids, and emergency equipment.
4. If you find anything unsafe during the pre-trip inspection, you
are required to:
A) Get it fixed before driving
B) Write it in your inspection report
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C) Drive cautiously until it is fixed
D) Ignore it if it's minor
Correct Answer: A
Rationale: If you find anything unsafe during the pre-trip
inspection, you must get it fixed before driving. You should not
operate a vehicle with safety defects.
5. For proper steering, steering wheel play should be no more
than:
A) 30 degrees
B) 25 degrees
C) 10 degrees
D) 45 degrees
Correct Answer: C
Rationale: Steering wheel play should be no more than 10
degrees (about 2 inches at the rim of a 20-inch wheel).
Excessive play can make steering difficult and unsafe.
6. You should hold your steering wheel:
A) Firmly with both hands
B) Firmly with one hand
Missouri Class A CDL Exam Practice Questions Complete
(Verified Updated!!!!2026–2027)
Exam Blueprint Overview
A Missouri Class A CDL allows you to operate any combination
of vehicles with a Gross Combination Weight Rating (GCWR) of
26,001 pounds or more, provided the Gross Vehicle Weight
Rating (GVWR) of the vehicle(s) being towed exceeds 10,000
pounds. This is the license required for tractor-trailers, big rigs,
and most heavy hauling.
Test Component Details
General Knowledge Test 50 questions; need 40 correct (80%) to pass
Combination Vehicles Test 20 questions; need 16 correct (80%) to pass
Air Brakes Test 25 questions; need 20 correct (80%) to pass
Endorsement Tests Varies by endorsement (HazMat, Tanker, Doubles/Triples, Passenger)
Required Tests for Class A: Basic Knowledge Test, Combination
Vehicle Test, and Air Brakes Test (if applicable).
, Page |2
Class A Endorsements: Hazardous Materials (H), Tank Vehicles
(N), Tank Vehicles Transporting Hazardous Materials (X),
Passenger Transport (P), School Bus (S), Doubles/Triples (T).
SECTION 1: GENERAL KNOWLEDGE (Questions)
Vehicle Inspection & Basic Control
1. What is the most important reason to inspect your truck or
bus before driving?
A) To check the battery fluid level
B) To check the amount of fuel in the vehicle
C) Safety for yourself and others
D) To check the tire pressure
Correct Answer: C
Rationale: The most important reason for a pre-trip inspection
is safety. A pre-trip inspection helps you find problems that
could cause a crash, breakdown, or fire. Safety for yourself, your
passengers, and other motorists is the primary concern.
2. A Class A pre-trip inspection should take at minimum:
A) 5 minutes
B) 15 minutes
, Page |3
C) 30 minutes
D) 60 minutes
Correct Answer: B
Rationale: A thorough pre-trip inspection should take at least
15 minutes to complete properly. Rushing through the
inspection increases the risk of missing critical safety defects.
3. Which of the following is checked in a pre-trip inspection?
A) Wiper blades
B) Steering wheel
C) All of the above
D) None of the above
Correct Answer: C
Rationale: A pre-trip inspection includes checking wiper blades,
the steering wheel, and many other components including tires,
brakes, lights, fluids, and emergency equipment.
4. If you find anything unsafe during the pre-trip inspection, you
are required to:
A) Get it fixed before driving
B) Write it in your inspection report
, Page |4
C) Drive cautiously until it is fixed
D) Ignore it if it's minor
Correct Answer: A
Rationale: If you find anything unsafe during the pre-trip
inspection, you must get it fixed before driving. You should not
operate a vehicle with safety defects.
5. For proper steering, steering wheel play should be no more
than:
A) 30 degrees
B) 25 degrees
C) 10 degrees
D) 45 degrees
Correct Answer: C
Rationale: Steering wheel play should be no more than 10
degrees (about 2 inches at the rim of a 20-inch wheel).
Excessive play can make steering difficult and unsafe.
6. You should hold your steering wheel:
A) Firmly with both hands
B) Firmly with one hand
