SC CDL DOUBLES TRIPLES PRACTICE TEST

11. Which of the following statements is true?
Poor cargo ventilation is a common cause of fire.
Under-inflated tires will NOT cause a vehicle fire.
There is no way that short circuits due to damaged insulation can cause a vehicle fire.
Carrying a properly charged and rated fire extinguisher will help prevent fires.
12. An ABS system:
helps increase a vehicle's stopping power.
decreases your stopping distance.
requires a change in the way you brake.
is a safety anti-skid braking system.
13. If during vehicle inspection a tire is too hot to touch, you should:
immediately decrease air pressure.
make sure there is enough engine oil on the tires.
let air out.
remain stopped until the tire cools off.
14. When driving in very hot weather, you may have to:
decrease your following distance.
reduce your speed to prevent overheating.
watch out for black ice.
increase your speed until the tires cool off.
15. Air pressure should build up in a single air system, within about:
10 minutes.
15 minutes.
1 minute.
3 minutes.
16. When inspecting the coupling, make sure the fifth-wheel jaws have closed around the:
head of the kingpin.
the electrical cord.
shank of the kingpin.
the brake camshaft.
17. Which of the following is most likely to roll over?
The front trailer of a double
The middle trailer of a triple
The rear trailer of a double
The rear trailer of a triple
18. ABS:
helps you increase your following distance.
does not decrease your stopping distance.
improves your visibility at night.
helps you increase your average speed.
19. Doubles:
are easier to drive than straight trucks.
require more reaction time than straight trucks.
are less likely to rollover than straight trucks.
None of the above.
20. Combination vehicles usually require _________ single commercial vehicles.
less driving skill than
more driving skill than
the same level of skill as
None of the above.
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