Click icons to use
Drivers Test Dashboard
Get coins by getting correct answers
World Coin Count
View High Scores
Use the Wrench to knock out incorrect answers, improve your chances to answer correctly, and help you save lives!
** Click on Wrench icon above to use **
30 Coins = 5 Extra Wrenches
You need 30 more coins to purchase
Buy Fuel to get 5 extra lives during a quiz!
** Click on Fuel icon above to use **
120 Coins = 1 Fuel
You need 120 more coins to purchase
When coupling a tractor and semi trailer and have connected the air lines, before backing under the trailer, you should:
Make sure the trailer brakes are disengaged.
Apply the brakes twice to engage the automatic hitching system.
Supply air to the trailer system and then pull out the air supply knob to lock the trailer brakes.
Apply the brakes quickly and firmly.
Open Dashboard ▼
0 Questions Completed | Your Top Speed is 0 MPH
Review Questions ▼
This question answered correctly by
When coupling a tractor and semi trailer and have connected the air lines, before backing under the ...