FLORIDA DOUBLES TRIPLES PRACTICE CDL TEST
11.
If you have to drive off the road, you should:
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keep one set of wheels on the pavement, if possible.
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brake as hard as you can to maintain control.
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leave the road completely.
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fully apply the brakes until your speed has dropped to about 20 mph.
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12.
Emergency brakes are:
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not required on commercial vehicles with air brakes.
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required on all vehicles.
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not required on doubles.
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not required on buses.
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13.
What is the minimum tread depth for tires other than front tires?
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2/32 inch
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4/16 inch
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8/32 inch
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4/32 inch
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14.
On dry pavement, the braking distance when traveling at 55 mph is about:
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61 feet.
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216 feet.
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419 feet.
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142 feet.
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15.
As you approach off ramps and on ramps, remember:
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to always brake and turn at the same time.
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that the posted speed limit may not be safe for larger vehicles.
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that downgrades make it easier to reduce speed.
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to maintain your highway speed.
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16.
When coupling double trailers, you can secure the second trailer by:
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using the trailer spring brakes.
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setting the trailer emergency brakes.
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chocking the wheels.
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All of the above.
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17.
You should always try to back toward the driver's side because:
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you can watch the rear of your vehicle out the side window.
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you can more easily correct any steering errors.
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backing toward the left side is more dangerous.
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None of the above.
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18.
In a dual air brake system, if one air system is very low on pressure:
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the effect won't be noticeable for the first 50 miles.
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either the front or rear brakes will not be operating fully.
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you should pump the brakes to restore pressure.
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you should drive and brake as you always have.
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19.
Too little weight on the driving axles can cause:
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longer stopping distances.
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mechanical damage.
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poor visibility.
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poor traction.
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20.
Watch out for black ice:
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right after it starts to rain.
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any time the temperature is below freezing and the road looks wet.
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when the temperature is above freezing and the road is dry.
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when it is snowing.
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