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The CDL general knowledge test is required to be taken by all CDL applicants. The Pennsylvania 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 Pennsylvania 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 PA 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. Blood Alcohol Concentration (BAC) is determined by:
how frequently you drink.
the type of alcohol you drink.
the amount of alcohol you drink.
All of the above.
2. Emergency equipment is:
only required when transporting hazardous materials.
3. If the road is icy, you should:
maintain your current speed and stop driving as soon as you can safely do so.
reduce speed to a crawl and stop driving as soon as you can safely do so.
put the transmission in neutral and stay off the brake until the vehicle has slowed down, then pull off the road and stop.
All of the above.
4. You should schedule trips for:
the middle of the night.
the middle of the day.
any time that fits your schedule.
the hours you are normally awake.
5. Parking brakes are:
not required on trailers.
not required on commercial vehicles with air brakes.
not required on buses.
required on all vehicles.
6. Axle weight is:
the weight of one axle.
the weight any axle or combination of axles transmits to the ground.
the loaded weight of a single vehicle.
the maximum safe weight a tire can carry at a specified pressure.
7. If a worker is close to the roadway in a work zone, you should:
pull off the road and stop.
reduce your speed below the posted speed limit.
drive at the posted speed limit.
drive on the shoulder.
8. Commercial motor vehicles:
are only required to have a fire extinguisher when transporting hazardous materials.
should have a properly charged and rated fire extinguisher and other emergency equipment.
are not required to have a fire extinguisher if they already have reflective warning triangles and other emergency equipment.
None of the above.
9. The person watching the loading or unloading of a cargo tank must be within _______ of the tank.
5 feet
25 feet
50 feet
15 feet
10. _________ can make vehicle handling unsafe.
Poor weight balance
Dry roads
Poor ventilation
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PA CDL Practice Test

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