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Iowa CDL Permit Test - Tank

(From the 2019 Iowa CDL driver handbook)
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 three possible answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Iowa 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
When driving a tank with liquid cargo, a surge:
Is usually helpful.
Can be dangerous.
Should not be a concern.
When driving a tank:
Curves should be taken faster than the posted speed limit.
Curves should be taken more slowly than the posted speed limit.
If there are two lanes of traffic, the tank should use both lanes.
During a cargo fire, opening the trailer doors may actually cause the fire to expand because doing so:
Allows oxygen into the trailer.
Changes the temperature of the trailer.
Provides more moisture to the trailer.
How long should it take for oil pressure to reach a normal level when starting a vehicle?
A few seconds
About a minute
About four minutes
If a tank is found to be leaking, the driver should:
Drive with their flashers on to warn other motorists.
Get the leak fixed immediately.
Finish the trip and then let someone know.
Distracted driving:
Can be avoided by eating while driving.
Can be increased by pre-programming radio stations.
Can be avoided by not engaging in complex conversations with others.
The best way to recognize that your trailer has started to skid is by:
Seeing other drivers' faces.
Seeing the trailer in your mirrors.
Feeling the trailer move.
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