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District Of Columbia CDL Permit Test - Tank

Number of questions: 20
Passing score: 16
Directions: This endorsement is required to haul any liquid or gaseous materials in a tank or tanks having a capacity of 1,000 gallons or more that is either permanently or temporarily attached to the vehicle or chassis. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. Each question has four possible answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Washington D.C. Commercial Driver License Manual. Questions come from chapters covering: Driving Safely, Tank Vehicles, Hazardous Materials and Combination Vehicles. The Tank endorsement can be used with the Class A, B or C CDL.
You have made error so far
Passing grade —
4 or fewer errors
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1.
Hydroplaning usually occurs:
When tires are properly inflated.
At speeds under 15 mph.
In areas where water collects on the road.
During the evening.
2.
How many seconds of following distance per every 10 feet of vehicle should you maintain when traveling more slowly than 40 mph?
One second
Two seconds
Three seconds
Four seconds
3.
When approaching your vehicle as part of your pre-trip inspection, you should look for what as a sign of trouble?
A puddle of oil under the vehicle
Inflated tires
Lights that are not cracked
4.
You should always be able to stop within:
10 feet of your vehicle.
1,000 feet of your vehicle.
Your view of the road ahead.
30 seconds of hitting the brakes.
5.
When accepting a package of hazardous materials, a driver should ensure:
The shipping paper matches the marking and labels on packages.
The shipping paper is written in code.
That all packages are labeled as poison.
The all boxes are sealed.
6.
When driving in fog, you should:
Use the windshield wipers.
Use the low beam headlights.
Use the high beam headlights.
Use the heater.
7.
Which type of vehicle is most prone to the “crack-the-whip” effect?
A five-axle tractor semi-trailer
A three-axle tractor semi-trailer
A bobtail tractor
A triple trailer
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