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The CDL general knowledge test is required to be taken by all CDL applicants. The New York CDL test consists of 50 questions. To pass, you must correctly answer at least 40 questions (80%). The general knowledge test covers the contents of the New York CDL Manual. All CDL applicants (Class A, B and C) must study the following sections: Driving Safely, Transporting Cargo Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Vehicle Inspection Test, Basic Control Skills Test, Road Test. In addition, the Class A CDL test will include questions based on the Combination Vehicles section. Take this CDL practice test now to prepare for the actual NY general knowledge test! To get your CDL, you must pass both the knowledge and skills tests. CDL knowledge tests include: General Knowledge, Passenger Transport, Air Brakes, Combination Vehicles, Hazardous Materials, Tanker Vehicles, Doubles/Triples, School Bus, Firefighter. Depending on what class of license (A, B or C) and endorsements you need, you must take one or more knowledge tests. A special endorsement is also required to drive certain types of vehicles. The following endorsements may be used with a Class A, B or C CDL: HazMat (H), Tank Vehicles (N), Tank Vehicles Transporting Hazardous Materials (X) and Passenger Transport (P). The School Bus endorsement (S) is only available for Class A or B CDL, and the Doubles/Triples endorsement (T) is only available for Class A driver's licenses.
1. How should you apply the brakes when going down a steep downgrade?
Apply the brakes when you reach the bottom of the downgrade.
Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
You should not brake, and only use engine braking to prevent brake failure.
Apply the brakes as hard as you can without locking the wheels.
2. You must have at least ________ tread depth in every major groove on front tires.
4/32 inch
1/2 inch
2/32 inch
1/16 inch
3. When should you inspect your vehicle and cargo?
Before and during a trip.
Before and after a trip.
Before, during and after a trip.
During and after a trip.
4. Before transporting a sealed load, you must check that:
the load is properly secured.
the seal on the load is secure.
the placard numbers and the seal numbers match.
the cargo is piled up.
5. Most hydraulic brake failures occur for one of two reasons, one of which is:
loss of hydraulic pressure.
relying too much on the engine braking effect.
driving in cold weather.
excessive downshifting.
6. If the vehicle ahead of you is smaller than yours:
it will take the same amount of time to stop.
it can probably stop faster than you can.
it will usually take longer to stop.
All of the above.
7. What three things add up to total stopping distance?
Reaction distance + viewing distance + braking distance
Reaction distance + braking distance
Braking distance + stopping distance
Perception distance, reaction distance and braking distance
8. To make an emergency using the stab braking method, you should:
apply firm pressure to the brake pedal and hold for 6 seconds, then pump the pedal three times.
fully apply the brakes until the wheels lock up, then stay off the brake until the vehicle has slowed down.
apply the brakes as hard as you can without locking the wheels.
apply your brakes all the way, release the brakes when the wheels lock up, and apply the brakes again as soon as the wheels start rolling.
9. Hydroplaning:
is less likely if tire pressure is low.
can occur at speeds as low as 30 mph.
can occur only if there is a lot of water on the road.
can occur at speeds as low as 10 mph, if there is a lot of water.
10. When you have to back, you should use a helper:
only when you back up with a trailer.
only when backing toward the right side.
whenever possible.
when you need to back on a curved path.
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NY CDL Knowledge Test

Number of questions: 50
Correct answers to pass:40
Passing score:80%
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