CDL COMBINATION PRACTICE TEST WISCONSIN

11. 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 quickly reduce your speed to 25 mph, and then release the brakes.
increase your speed to approximately 45 mph, and then apply release the brakes.
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.
12. Where are shut-off valves?
On converter dollies.
At the front and back of each trailer.
At the back of each trailer.
At the front of each trailer.
13. Which of the following is NOT part of inspecting the coupling?
Making sure the fifth-wheel jaws have closed around the shank of the kingpin.
Checking that the locking lever is in the "lock" position
Making sure there is no space between the upper and the lower fifth-wheel
Checking for enough clearance between the rear of the tractor frame and the landing gear.
14. Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?
The letters "ABS" are printed on the side of the steering wheel.
It has yellow ABS malfunction lamps.
It was built after March 1, 1998.
Wheel speed sensor wires are coming from the back of the brakes.
15. Hydroplaning:
only occurs at extremely high speeds.
can occur at speeds as low as 30 mph.
never occurs at speeds below 40 mph.
only happens when tire pressure is higher than normal.
16. If the drive wheels begin to spin when accelerating, you should:
take your foot off the accelerator.
continue to accelerate.
brake gently.
set the parking brake.
17. If a drawbridge does not have a signal light or traffic control attendant, you should:
stop at least 5 feet before the draw of the bridge.
stop and look to make sure the draw is completely closed before crossing.
get through the drawbridge as quickly as possible.
drive through the drawbridge with caution.
18. When you drive a tractor-trailer combination with ABS, you should:
pump the brakes.
brake as you always have.
apply the trailer hand brake whe braking.
always apply the brakes hard.
19. After starting the engine, oil pressure should rise to a normal level:
within 3 miles.
within 6 minutes.
within 2 minutes.
within seconds.
20. When backing a trailer on a curved path you should back towards:
either side.
the driver's side.
the passenger's side.
neither side (back up straight).
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