MARYLAND DOUBLES TRIPLES PRACTICE CDL TEST
11.
Emergency brakes are:
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required on all vehicles.
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not required on buses.
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not required on doubles.
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not required on commercial vehicles with air brakes.
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12.
When more cargo is piled up in a truck, the center of gravity moves:
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higher up from the road.
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to the left side of the truck.
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to the right side of the truck.
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closer to the ground.
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13.
If the low air pressure warning light comes on, you should:
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continue to drive normally.
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call for help.
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set the parking brake.
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stop immediately.
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14.
It may not be safe to operate at legal maximum weights:
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in hot weather.
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on highways.
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on two-way streets.
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during bad weather or in mountains.
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15.
When more than one semitrailer is behind the tractor:
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the lighter trailer should be in the rear.
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the more heavily loaded semitrailer should be in the rear.
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the more heavily loaded trailer should be disconnected.
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The order doesn't matter.
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16.
On dry pavement, the braking distance when traveling at 55 mph is about:
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216 feet.
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61 feet.
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142 feet.
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419 feet.
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17.
Which of the following is NOT true?
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ABS will change the way you normally brake.
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ABS won't compensate for bad brakes.
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ABS won't compensate for poor brake maintenance.
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ABS only comes into play when a wheel would have locked up because of over braking.
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18.
After an accident, an improper use of flares could cause:
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a fire if spilled fuel is on the ground.
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the springs to put on the brakes.
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air pressure to build from 50 to 100 psi within 2 minutes.
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the vehicle to slide back and forth.
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19.
To know if your vehicle is equipped with ABS, look for:
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an ABS placard.
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a yellow ABS malfunction lamps on the instrument panel.
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the ABS shipping paper.
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the ABS logo on the steering wheel.
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20.
To know how much space you should keep in front of you:
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estimate how many vehicle lengths there are between you and the vehicle ahead.
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wait until the vehicle ahead of you passes a clear landmark, then count off the seconds until you reach the same spot.
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estimate how many seconds it would take you to reach the vehicle ahead.
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None of the above.
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