Take North Dakota CDL Combination Test 2

QUESTION 1 / 20

If a trailer begins to jackknife, you should not:

Choose one answer below.

ARelease the brakes.✓BApply the trailer hand brake.✓CAllow the wheels to grip the road.✓DAllow the trailer to straighten out.✓

QUESTION 2 / 20

Starting in which year were newly manufactured trailers required to have ABS?

Choose one answer below.

A1972✓B1987✓C1998✓D2004✓

QUESTION 3 / 20

A lightly-loaded combination vehicle will stop more slowly than a fully-loaded vehicle because:

Choose one answer below.

AThe stiff suspension springs and strong brakes will have high traction.✓BThe stiff suspension springs and strong brakes will have low traction.✓CThe brakes only operate when a trailer reaches a minimum weight.✓DThe suspension springs only operate when a trailer reaches a minimum weight.✓

QUESTION 4 / 20

When driving a bobtail tractor, you should be aware that:

Choose one answer below.

ABobtails stop very easily.✓BBobtails cannot drive as fast as tractors with semitrailers.✓CBobtails are more difficult to stop than tractors with semitrailers.✓DBobtails are illegal in most states.✓

QUESTION 5 / 20

Rollovers happen when drivers:

Choose one answer below.

ATurn too quickly.✓BDo not driving fast enough.✓CPay attention to the road.✓DDrive illegally.✓

QUESTION 6 / 20

In a double or triple combination:

Choose one answer below.

ACargo weight must be evenly distributed between all trailers.✓BThe heaviest trailer should be positioned directly behind the cab.✓CThe heaviest trailer should be positioned in the rear.✓DThe weight of the trailers does not matter.✓

QUESTION 7 / 20

When lightly loaded, combination vehicles:

Choose one answer below.

AShould not be driven.✓BHave reduced braking capabilities.✓CWill not rollover.✓DShould be loaded with most of the weight in the rear of the trailer.✓

QUESTION 8 / 20

Using the trailer hand valve while driving:

Choose one answer below.

AWill help you turn safely.✓BWill stop your trailer safely.✓CCan cause a skid.✓DIs impossible.✓

QUESTION 9 / 20

If oil and water build up in your vehicle's air tanks, the brakes:

Choose one answer below.

AMay not work correctly.✓BMay feel squishy.✓CWill squeal loudly when used.✓DWill be extremely sensitive.✓

QUESTION 10 / 20

Before a drive, ensure that air flows to all trailers by:

Choose one answer below.

AOpening the rear shut-off valves and listening for escaping air.✓BClosing the rear shut-off valves and listening for escaping air.✓CDisconnecting air supply lines and listening for escaping air.✓DRolling each trailer down a hill and testing the brakes.✓

QUESTION 11 / 20

What is another name for the service line?

Choose one answer below.

AControl line✓BExchange line✓CSurplus line✓DParallel line✓

QUESTION 12 / 20

Large combination vehicles take the longest amount of time to stop:

Choose one answer below.

AWhen fully loaded.✓BWhen partially loaded.✓CWhen empty.✓DWhen mostly loaded.✓

QUESTION 13 / 20

Avoid needing to make sudden lane changes by:

Choose one answer below.

AUsing your horn to encourage other drivers to move out of your lane.✓BOnly driving slower than the posted speed limit.✓CWatching the road ahead while driving.✓DPulling off the road and waiting when there is high traffic.✓

QUESTION 14 / 20

Combination vehicles:

Choose one answer below.

AAre usually shorter than single commercial vehicles.✓BAre usually lighter than single commercial vehicles.✓CRequire more skill to drive than single commercial vehicles.✓DAre easier to drive than single commercial vehicles.✓

QUESTION 15 / 20

Driving a combination vehicle ____ than driving a single vehicle.

Choose one answer below.

AIs easier✓BRequires more driving skill✓CIs better for training✓DIs safer in inclement weather✓

QUESTION 16 / 20

To prevent a rollover, cargo should be:

Choose one answer below.

APlaced near the front of a trailer.✓BPlaced near the rear of a trailer.✓CSpread out on a trailer.✓DLoaded with most weight on the driver’s side of a trailer.✓

QUESTION 17 / 20

Rollovers happen when:

Choose one answer below.

AYou drive too slowly.✓BYou are stopped.✓CYou turn too quickly.✓DYou plan an escape route.✓

QUESTION 18 / 20

The service air line is attached to the:

Choose one answer below.

ARelay valves.✓BSupply line.✓CEmergency air line.✓DSteering wheel.✓

QUESTION 19 / 20

Rollovers are most likely to happen when:

Choose one answer below.

ADrivers turn too fast.✓BDriver turn too slowly.✓CIt is windy.✓DIt is raining.✓

QUESTION 20 / 20

____ are the cause of more than half of all accident-related truck driver deaths.

Choose one answer below.

ATruck rollovers✓BMotorcycles✓CSlippery roads✓DPedestrians✓