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Driving Test
District of Columbia
District of Columbia CDL Knowledge Test Class B 2
Answers
Q.1.
Cargo on flatbed trailers should be:
Tied down.
Glued down.
Left loose.
Pushed to one side.
Q.2.
Which of the following statements is correct?
Rims with a missing lug nut are acceptable if there are at least four other lug nuts on the rim.
A cracked lock ring is acceptable if the vehicle is being driven at speeds under 55 mph.
A missing clamp is dangerous and should be corrected.
Welded repairs are acceptable for wheels on rear axles.
Q.3.
Convex mirrors:
Cannot be used on vehicles transporting hazardous materials.
Can replace flat mirrors.
Can be helpful to see a wider area.
Are illegal to be used in most states.
Q.4.
In a vehicle with dual parking control valves, once air pressure is lost and the spring brakes come on:
You will be unable to move the vehicle.
A separate air tank can be used to release the spring brakes for a short period of time.
You can use the spring brakes to continue driving normally.
The air tanks will automatically refill to a safe air pressure level.
Q.5.
Your vehicle's final position should be:
Exactly where the examiner has instructed it to be.
Within five feet of the final position described by the examiner.
Wherever you can safely park.
Within two feet of the final position described by the examiner.
Q.6.
Cargo inside a trailer:
Does not need to be secured.
Should be stacked no taller than three feet high.
Should be secured to prevent movement in transit.
Should be loaded with the heaviest items on top of lighter items.
Q.7.
If you’re feeling tired before a drive, you should:
Drink coffee.
Take caffeine pills.
Not drive.
Drive as fast as possible so you get to the destination quickly.
Q.8.
Most heavy vehicles require ____ to change gears.
Double clutching
Double shifting
Triple clutching
Triple shifting
Q.9.
After an accident, flares should be used with caution because:
There may be spilled fuel on the ground that could ignite.
Other drivers may not see the flares.
Flares are expensive.
Other drivers may get confused about what is happening.
Q.10.
When steering to avoid a crash, you should:
Only use one hand to steer.
Keep both hands on the steering wheel.
Not use your mirrors to check other lanes.
Speed up as you get nearer to the hazard.
Q.11.
Why do you need to drain air tanks regularly?
Because the air gets old and needs to be replaced
Because compressed air contains some water which must be drained from the tanks
To allow for a change in air pressure
To remove bad air from the tanks
Q.12.
You should always use at least ____ to secure cargo on a flatbed trailer.
One tie-down
Two tie-downs
Three tie-downs
Four tie-downs
Q.13.
What is a wig wag?
A type of warning system
A tube used to move air from the compressor to the tanks
A noise made by air brakes when used
A part within the braking unit that allows air to move freely
Q.14.
Which of the following is not an example of a driver who might be a hazard?
A driver operating a vehicle without first scraping ice off the windshield
The operator of a rental truck
The driver of a station wagon with items covering the back windows
A person operating a pick-up truck
Q.15.
During the vehicle inspection test, you will be required to do all of the following, except:
Crawl under the vehicle.
Explain what you are checking and why.
Walk around the vehicle.
Point to or touch each item.
Q.16.
If transporting livestock, drivers should be concerned about:
Other motorists seeing the livestock.
The vehicle's weight shifting as the animals move.
Extra tolls.
Passing emissions testing.
Q.17.
When inspecting the engine compartment, you should not:
Check the engine oil level.
Check the coolant level in the radiator.
Drain the brake fluid.
Check the windshield washer fluid level.
Q.18.
A serious traffic violation involves each of the following offenses, except:
Excessive speeding.
Littering.
Reckless driving.
Following too closely.
Q.19.
When driving on the expressway during the skills test, you should:
Switch lanes frequently.
Use your mirrors to check traffic as needed.
Drive on the left side of the lane.
Drive above the posted speed limit.
Q.20.
When inspecting cargo, the driver should do all of the following, except:
Ensure that the truck is not overloaded.
Ensure that the cargo is balanced.
Ensure that the cargo is secured properly.
Ensure that the breakable items are placed under heavier items.
Q.21.
Stopping distance can be affected by:
Speed.
Sunshine.
Time of day.
Traffic.
Q.22.
How is water and compressor oil removed from the bottom of an air storage tank?
The water and oil are siphoned out of the tank.
A drain valve is opened to remove the water and oil from the tank.
The water and oil are removed automatically as the brakes are used.
A sponge is used to soak up the water and oil.
Q.23.
Cargo inside a trailer:
Does not need to be secured.
Should be stacked no more than three feet high.
Should be secured to prevent movement.
Should be loaded with the heaviest items on top of lighter items.
Q.24.
Bridges usually:
Freeze, but only once the temperature drops significantly below 32 degrees Fahrenheit.
Freeze after other road surfaces freeze.
Freeze before other road surfaces.
Have heaters to prevent them from freezing.
Q.25.
If exiting a bus during the basic vehicle control skills test, you must:
Keep both hands on the handrail.
Not touch the handrail.
Maintain a firm grasp on the handrail.
Rush down the stairs.
Q.26.
Without oil in its engine:
A vehicle will likely run smoothly.
A vehicle will make quick jerks while driving.
A vehicle's engine may be damaged quickly.
A vehicle's gas mileage will improve.
Q.27.
When switching gears, what happens if you remain in neutral for too long?
The vehicle will speed up.
You may have trouble getting the vehicle into the next gear.
You may kill the engine.
The vehicle will be difficult to stop.
Q.28.
Which of the following is not a problem?
Loose or broken exhaust pipes
Loose or broken mounting brackets
Exhaust parts rubbing against fuel system parts
Exhaust system parts that are not leaking
Q.29.
During the basic vehicle control skills test:
A pull-up always counts against the applicant.
A pull-up should be completed at least once.
Stopping without changing direction is not considered a pull-up.
Excessive pull-ups are acceptable in the opinions of some test administrators.
Q.30.
If turning to avoid a hazard:
You should brake hard.
You should not brake as it could cause the wheels to lock.
You should turn the wheel very sharply.
You should hold down the brakes until you are past the hazard.
Q.31.
Which of the following is not a sign of fatigue?
Ability to focus
Daydreaming
Yawning repeatedly
Drifting from your lane
Q.32.
The best way to avoid glare at night from oncoming vehicles is to:
Wear sunglasses.
Close your eyes as vehicles approach.
Look to the right side of road.
Use your high beams.
Q.33.
Driving too fast:
Is a major cause of fatal crashes.
Can be a good way to get to your destination quickly.
Should only be done if the roadway is dry.
Is acceptable in light traffic.
Q.34.
What kind of force must emergency brakes use?
Air pressure
Mechanical
Heavy
Electrical
Q.35.
When backing, you should:
Move quickly to get out of the way of other drivers.
Try not to use your mirrors.
Start from any position.
Use a helper, if possible.
Q.36.
How can you prevent drowsiness before a trip?
Get about four hours of sleep.
Plan stopping points into your trip in advance.
Drive alone.
Schedule long trips at night.
Q.37.
Pre-trip inspections should be done:
Differently each time, emphasizing different items.
The same way each time so you are less likely to forget something.
Once in a while.
By someone other than the driver.
Q.38.
Which of the following is not a way to reduce driving distractions?
Pre-programming radio stations
Planning the route before driving
Eating while driving
Adjusting mirrors before driving
Q.39.
Hydraulic brakes can fail for one of two reasons. Which of the following is one of those reasons?
There is a loss of hydraulic pressure.
You are driving uphill.
The brakes get too cold.
The brakes are used too much in one day.
Q.40.
When driving down a steep grade, your brakes may fade. What happens if brakes fade?
They become quieter.
They become less effective.
They work better than usual.
They work differently from front to back.
Q.41.
When changing lanes, you should:
Move quickly, before other vehicles can enter into the lane.
Move slowly in case another vehicle is in the lane.
Not use a turn signal.
Avoid the right lane.
Q.42.
To make it as safe as possible to leave a stop, you should park:
So that you must back up to leave your parking space.
So that you can pull forward to leave your parking space.
On the side of a roadway, not in a parking lot.
By backing into a parking space.
Q.43.
When a construction worker is close to the road, you should:
Increase your speed.
Decrease your speed.
Not drive in any lane.
Wait until the construction is complete before proceeding.
Q.44.
Be sure you are always driving so your vehicle can stop:
Within 10 feet of your current position.
Within 1,000 feet of your current position.
Within your view of the road ahead.
Immediately.
Q.45.
How is the parking brake released?
By tapping the brake pedal three times
By pushing in the brake control knob
By starting the vehicle
By tapping the accelerator twice
Q.46.
During a written exam:
Cell phones may be placed on airplane mode.
Cell phones must be turned off.
Cell phones may be left on, but must be set in a face down position.
Cell phones may be left on.
Q.47.
If a person operates in both excepted and non-excepted intrastate commerce, which type of license should the driver select?
Either excepted or non-excepted
Excepted
Non-excepted
Traditional
Q.48.
When parked on the side of the road, you should:
Use only the rear flashing lights.
Use one set of turn signals.
Use your high beam headlights.
Use your four-way flashers.
Q.49.
When you need to brake, how can you warn drivers behind you?
Tap on the brakes a couple of times.
Stick your arm out the window.
Swerve within your lane.
Change lanes.
Q.50.
Most heavy-duty vehicles use ____ air brake systems.
Single
Dual
Triple
Quad
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