UTAH CDL COMBINATION PRACTICE TEST
11.
To know how much space you should keep in front of you when driving at speeds below 40 mph, one good rule says you need at least ______ for each ______ of vehicle length.
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1 second; 10 feet
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2 seconds; 10 feet
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3 seconds; 50 feet
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1 second; 5 feet
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12.
Passive railroad crossings:
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do not have traffic control devices.
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usually have a person directing traffic.
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should never be crossed using a CMV.
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have at least one traffic control device.
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13.
When you drive a tractor-trailer combination with ABS, you should:
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pump the brakes.
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brake as you always have.
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always apply the brakes hard.
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apply the trailer hand brake whe braking.
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14.
Which of the following trailers can get stuck on raised crossings?
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Moving van
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Lowboy
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Car carrier
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All of the above.
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15.
To avoid rollbacks when you start, you should:
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if you have manual transmission, partly engage the clutch before you take your right foot off the brake.
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put on the parking brake whenever necessary.
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release the parking brake only when you have applied enough engine power.
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All of the above.
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16.
When driving with cargo, you should re-check the cargo and securing devices as often as necessary to keep the load secure, and inspect again:
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every 3 hours or 150 miles.
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every 30 minutes or 50 miles.
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every 6 hours or 300 miles.
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every day.
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17.
What factors can cause brakes to fail or fade?
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Excessive use of the service brakes
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Brakes out of adjustment
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Not relying on the engine braking effect
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All of the above.
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18.
Most heavy-duty vehicles use:
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pressure brakes.
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hydraulic brakes.
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solid brakes.
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air brakes.
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19.
A trailer jackknife is more likely to happen when the trailer is:
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empty.
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overloaded.
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loaded to its full capacity.
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None of the above.
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20.
When you inspect the coupling, make sure there is ______ between the upper and lower fifth wheel.
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enough space
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about 1 inch
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no space
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about 1/2 inch
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