MISSOURI CDL COMBINATION PRACTICE TEST
11.
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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release the parking brake only when you have applied enough engine power.
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All of the above.
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12.
The only way to stop a front-wheel skid is to:
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let the vehicle slow down.
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countersteer.
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supply more power to the drive wheels.
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13.
Air brakes use ________ to make the brakes work.
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compressed gases
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compressed gas cylinders
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compressed air
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14.
To unlock the fifth wheel, pull the release handle to the _______ position.
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neutral
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closed
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open
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15.
When should you use chocks to park a trailer without spring brakes?
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Only when parking downhill
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Always
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Never
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16.
A burning tire must be:
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immediately removed from the vehicle.
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covered with cloth.
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cooled with water.
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17.
Radial and bias-ply tires:
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should be used together only when driving in packed snow.
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should be used together.
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should not be used together.
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18.
If your trailer starts to skid, you should:
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use the trailer hand brake (if you have one) to straighten out the rig.
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keep the rear of your vehicle close to the curb.
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release the brakes to get traction back.
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19.
If a load is 10 feet long, the minimum number of tie-downs required is:
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3
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1
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2
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20.
One way to prevent hydroplaning is to:
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make sure you have enough tread on your tires.
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have less than 4/32 inch tread depth in every major groove on front tires.
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take curves at higher speeds.
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