PA CDL DOUBLES TRIPLES TEST - PRACTICE TEST

11. Another name for front-end header boards is:
containerized racks.
head belt.
cargo stopper.
headache racks.
12. When checking the engine compartment in a vehicle inspection, you should check all of the following except:
Coolant level in radiator
Shock absorbers
Windshield washer fluid level
Engine oil level
13. On front tires, tread should be at least:
2/32 inch
1/16 inch
4/32 inch
4/16 inch
14. Combination vehicles have __ air lines.
2
1
4
3
15. When the wheels of a trailer lock up:
the vehicle will gradually come to a complete stop.
the trailer will tend to swing around.
ABS will increase stopping power.
All of the above.
16. To reduce driver distraction, you should do all of the following except:
Pre-program radio stations
Eat while driving.
Adjust mirrors before driving
Plan your route before driving
17. You are driving on a steep downgrade in the proper low gear. Your "safe" speed is 40 mph. When your speed reaches 40 mph, you should:
apply the brakes to gradually reduce your speed to 35 mph, and then release the brakes.
maintain your current speed, and apply the brakes when you reach 50 mph to gradually reduce your speed to 40 mph.
increase your speed to approximately 45 mph, and then apply release the brakes.
apply the brakes to quickly reduce your speed to 25 mph, and then release the brakes.
18. Most heavy duty vehicles use ___ air brake systems for safety.
reduced
single
triple
dual
19. Which of the following will off-track the most?
The rear wheels of the last trailer.
The front wheels of the tractor.
The front wheels of the last trailer.
The rear wheels of the tractor.
20. Empty trucks:
require shorter stopping distances than fully-loaded trucks.
have better traction than fully-loaded trucks.
may have poor traction.
None of the above.
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