Alabama CDL Combination Vehicles Practice Test 2019

Question 1

THERE ARE TWO THINGS THAT A DRIVER CAN DO TO PREVENT A ROLLOVER. THEY ARE "GO SLOW AROUND CORNERS" AND _____.

Accepted Answer

Keep the weight of your cargo as close to the ground as possible

Answer

Make sure that the brakes are properly balanced

Answer

Use the trailer hand valve before the brake pedal

Answer

Keep both hands firmly on the steering wheel

Question 2

WHY SHOULD YOU NOT USE THE TRAILER HAND VALVE WHILE DRIVING?

Accepted Answer

Because of the danger of making the trailer skid

Answer

Because it won't work as well as the foot brake

Answer

Because you should use the parking brake

Answer

Because it is hard to reach

Question 3

WHEN YOU BACK A TRAILER, YOU SHOULD POSITION YOUR VEHICLE SO YOU CAN BACK IN A CURVED PATH TO THE DRIVER’S SIDE. TRUE OR FALSE?

Accepted Answer

TRUE

Answer

FALSE

Question 4

WHAT MIGHT HAPPEN IF THE TRAILER IS TOO HIGH WHEN YOU TRY TO COUPLE?

Accepted Answer

The trailer may not couple correctly

Answer

The trailer may start rolling

Answer

You will not be able to connect the air lines

Answer

You will not be able to connect the electrical cord

Question 5

YOU ARE DRIVING A SEMI AND THE TRAILER BREAKS AWAY, PULLING APART THE AIR LINES. YOU EXPECT THE TRAILER BRAKES TO COME ON AND ____ .

Accepted Answer

The tractor brakes to keep working

Answer

The tractor to lose all air pressure

Answer

The trailer supply valve to stay open

Answer

The tractor brakes to lock up

Question 6

WHICH SHUT-OFF VALVES SHOULD BE OPEN AND WHICH CLOSED?

Accepted Answer

Emergency and service lines at the back of the last trailer closed, valves on the trailer open

Answer

All emergency lines open, all service lines closed

Answer

All emergency lines closed, all service lines open

Answer

Emergency and service lines at the back of the last trailer open, valves on the trailer closed

Question 7

THE AIR LEAKAGE RATE FOR A COMBINATION VEHICLE (ENGINE OFF, BRAKES OFF) SHOULD BE NO MORE THAN ____ PSI PER MINUTE.

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 8

THE FEWER AXLES ON A UNIT, THE MORE STABLE IT IS?

Accepted Answer

FALSE

Answer

TRUE

Question 9

AIR LINES ON A COMBINATION VEHICLE ARE OFTEN COLORED TO KEEP THEM FROM GETTING MIXED UP. THE EMERGENCY LINE IS ____; THE SERVICE LINE IS ____.

Accepted Answer

Red, blue

Answer

Black, yellow

Answer

Blue, red

Answer

Depends on the type of trailer

Question 10

WHAT IS OFF-TRACKING?

Accepted Answer

When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels

Answer

When a vehicle goes around a corner, and the driver pulls off the road

Answer

When a vehicle goes around a curve and turns back the other way

Answer

Driving on a dirt road or a gravel covered road

THERE ARE TWO THINGS THAT A DRIVER CAN DO TO PREVENT A ROLLOVER.THEY ARE "GO SLOW AROUND CORNERS" AND _____.