CDL PRACTICE TEST (IL) - GENERAL KNOWLEDGE TEST

21. The air compressor is connected to:
the radiator.
the transmission.
the suspension system.
the engine.
22. Escape ramps are:
used by vehicles exiting the expressway.
reserved for combination vehicles.
reserved for vehicles carrying dangerous goods.
used to stop runaway vehicles safely.
23. If your vehicle is equipped with a front brake limiting valve, to ensure normal stopping power make sure the control is:
in the "neutral" position.
in the "normal" position.
in the "slippery" position.
in the "off" position.
24. Most heavy-duty vehicles use:
pump-the-brake systems.
dual air brake systems.
triple air brake systems.
single air brake systems.
25. The wheels of a large combination vehicle are more likely to lock up when:
the vehicle is lightly loaded.
the trailer has new tires.
the vehicle is heavily loaded.
you are traveling in very hot weather.
26. Emergency brakes are:
not required on doubles.
not required on buses.
not required on commercial vehicles with air brakes.
required on all vehicles.
27. Air pressure should build up in a single air system, within about:
1 minute.
10 minutes.
3 minutes.
15 minutes.
28. To avoid rollbacks when you start, you should:
if you have manual transmission, partly engage the clutch before you take your right foot off the brake.
put on the parking brake whenever necessary.
release the parking brake only when you have applied enough engine power.
All of the above.
29. You should be aware that many car drivers closely follow large vehicles especially:
when crossing a bridge.
in bad weather.
in the city.
on the highway.
30. Which of the following beverages contains the most alcohol?
A 1½-ounce shot of 80 proof liquor
A 5 ounce glass of 12% wine
A 12 ounce glass of 5% beer
All of the above.
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