CDL PRACTICE TEST - GENERAL KNOWLEDGE (DELAWARE)

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The CDL general knowledge test is required to be taken by all CDL applicants. The Delaware 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 Delaware 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 DE 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. When using double clutching to shift gears, if you are having difficulty putting the vehicle into the next gear you should:
reduce the engine speed to drop back to the previous gear.
prevent the transmission from shifting up beyond the selected gear.
return to neutral, release the clutch, increase the engine speed to match the road speed, and try again.
force the lever until you put the vehicle into the next gear.
2. The Gross Combination Weight (GCW) is:
the total weight of a single vehicle including its load.
the weight of the vehicle, trailer, and cargo.
the weight of the trailer and cargo.
the weight of the vehicle and its trailer(s).
3. When checking the lights before driving:
the engine must be running.
you should turn off the engine.
you should check them from inside the vehicle.
make sure the parking brake is not set.
4. When checking the condition of the steering system, you must:
Visually inspect the steering mechanism.
Test what happens under braking conditions.
Check the windshield wiper arms.
grab the steering mechanism to test for looseness.
5. To avoid distractions while driving, you should:
use your phone only when there is no traffic around you.
adjust vehicle controls and mirrors prior to driving.
try to engage in complex conversations with the other occupants.
smoke, eat, and drink only when the road is straight.
6. Which of the following is NOT true?
ABS won't compensate for poor brake maintenance.
ABS will change the way you normally brake.
ABS only comes into play when a wheel would have locked up because of over braking.
ABS won't compensate for bad brakes.
7. Under-loaded front axles can:
make the steering axle weight too light to steer safely.
cause poor traction.
cause the drive wheels to spin easily.
All of the above.
8. The hazardous materials endorsement is valid for:
2 years
5 years
4 years
1 year
9. When you have to back, you should use a helper:
only when backing toward the right side.
only when you back up with a trailer.
when you need to back on a curved path.
whenever possible.
10. A steering wheel play of more than ___ degrees can make it hard to steer.
20
60
10
45
 
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DE CDL Knowledge Test

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