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The tanker endorsement applies to drivers who wish to drive a tank in Class A, B, or C CDL. To add this endorsement to your CLP/CDL, you must pass a knowledge test on the problems posed by large volume liquid cargos. The District of Columbia CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The DC tanker test covers the following sections of the District of Columbia CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this DC tanker practice test now to prepare for the actual test!
1. To avoid a hazard:
stopping is always the best thing to do.
changing lanes is always the best thing to do.
steering away from what is ahead may be the best thing to do.
driving on the shoulder of the road is always the best thing to do.
2. When backing, you should:
back quickly.
use the mirrors on both sides.
only use mirror on the driver's side.
back and turn toward the right side whenever possible.
3. Which of these statements about using your mirrors is FALSE?
There are blind spots that your mirrors cannot show you.
When driving, you should check mirrors regularly to know where other vehicles are around you.
You should use your mirrors to spot overtaking vehicles.
None of the above.
4. Smooth bore tanks:
have nothing inside to slow down the flow of liquid.
have bulkheads with holes to let the liquid flow through.
expand by different amounts depending on the liquid.
have bulkheads in them with holes to limit the flow of liquid.
5. _________ are sometimes called "smooth bore" tanks.
Liquid tankers with baffles
Tanks made of aluminum
Unbaffled liquid tankers
None of the above.
6. Your vehicle may take longer to stop:
if you are driving in hot weather.
if the tank is empty.
if the tank is full of dense liquid.
if the road is dry.
7. When driving a tanker, you should:
stop every 50 miles to inspect your vehicle.
increase your following distance.
decrease your following distance.
drive 10 mph below the posted speed limit.
8. Rims with welding repairs:
can be used for tires in the front of the vehicle.
are not safe.
are acceptable only when carrying a heavy load.
can be used for tires in the rear of the vehicle.
9. When backing, it is best to:
try to back in the direction of the drift.
back toward the passenger's side when possible.
use only the passenger's side mirror.
use a helper whenever possible.
10. You should do an after-trip inspection:
after each trip.
once a month.
at least once a week.
after each stop.
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Tanker Test - DC CDL

Number of questions: 20
Correct answers to pass:16
Passing score:80%
Number of questions: 20
Correct answers to pass:16
Passing score:80%
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