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Driving Test
District of Columbia
District of Columbia CDL Knowledge Test Class B 1
Answers
Q.1.
When a tire goes flat, you may hear a loud bang. The truck will be affected:
Immediately.
After a short delay.
Only if the damaged tire is near the front of the truck.
Only if the truck is hauling a load.
Q.2.
If you are turning left and there are two available left turn lanes, which lane should you choose?
The left lane
The right lane
Either lane
Trucks should not turn where there are two left turn lanes.
Q.3.
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.4.
If confronted by an aggressive driver, you should:
Make eye contact with the driver.
React to the driver's gestures.
Challenge the driver to a road race.
Ignore the driver, if possible.
Q.5.
A header board is used to:
Allow a driver to see behind them.
Protect the driver from moving cargo.
Provide extra storage capacity.
Prevent the driver from leaving the tractor.
Q.6.
A cargo cover that flaps while you are driving:
Is acceptable.
Allows air to keep the cargo cool.
Can tear away.
Can attract birds.
Q.7.
During a vehicle inspection, ensure that the landing gear is:
Retracted.
Fully raised.
More worn on the passenger's side than on the driver's side.
Well lit.
Q.8.
Air tank drains:
Allow rain water to enter the tanks.
Are used to drain water and oil from the air tanks.
Should never be opened.
Must remain open while driving.
Q.9.
Once cargo is secured:
You may complete an entire trip without checking it.
You can drive at least eight hours without checking it.
You should check it every three hours or 150 miles.
You should not check it.
Q.10.
When carrying a wide load, you should:
Drive as fast as possible.
Obtain special permits and follow special rules.
Honk at other drivers to get them to move from the lane closest to you.
Drive on the shoulder.
Q.11.
In very hot weather, tires should be checked regularly because:
They may melt.
Air pressure may increase with the temperature.
The tread wears down extra quickly.
The lug nuts may loosen.
Q.12.
A tank endorsement is:
Only required when transporting gases.
Only required when transporting liquids.
Required to transport both liquids and gases.
Optional when transporting hazardous materials.
Q.13.
When driving down a steep grade:
You should ride your brakes all the way down.
Shift into a higher gear as a way to slow down your vehicle.
Shift into lower gears as a way to slow down your vehicle.
The truck should be put in neutral as a way to slow down your vehicle.
Q.14.
Roads are most slippery right after it begins to rain because:
The water mixes with oil and grease on the road.
The roads are naturally slippery.
The gravel gets washed to the middle of the lane.
Some tires are not designed for rain.
Q.15.
What does driving intrastate mean?
Traveling within a single state
Traveling from one state to another state
Traveling mostly within one state
A limited-access roadway
Q.16.
How much water must be on a road surface for a vehicle to hydroplane?
Usually several inches
A good amount, such as a large puddle
A small amount
None
Q.17.
While driving a vehicle, if an unusual noise or feeling occurs, the driver should:
Assume it is not a concern and continue driving.
Hope the vehicle makes it until it is switched to another driver.
Check the vehicle to determine the proper solutions.
Drive on the shoulder.
Q.18.
When using a fire extinguisher on a fire, you should:
Get as close to the fire as possible.
Stay as far away from the fire as possible.
Aim the extinguisher at the top of the flames.
Aim the fire extinguisher at the ground about two feet away from the fire.
Q.19.
Tread depth in the major grooves on a front tire should be at least:
1/32 of an inch.
2/32 of an inch.
4/32 of an inch.
3/4 of an inch.
Q.20.
Driving at night is:
Safer than driving during the day.
Just as safe as driving during the day.
More dangerous than driving during the day.
Discouraged.
Q.21.
A thin layer of ice that forms on road surfaces is called:
White ice.
Black ice.
Green ice.
Blue ice.
Q.22.
During the vehicle inspection test, you will be asked to:
Change a tire.
Explain to the examiner what you would inspect and why.
Estimate the weight of a load in a trailer.
Change a windshield wiper.
Q.23.
If a truck is equipped, a trailer brake hand valve can be used to:
Add fuel to the vehicle.
Prevent the vehicle from rolling back when being started from a stop.
Check the oil level.
Load cargo.
Q.24.
When driving under wet conditions, what does a lack of spray from other vehicles indicate?
Ice has formed on the road.
The pavement is dry.
The spray is caught on the underside of the vehicle.
The tires have soaked up all the moisture.
Q.25.
If you need to travel down a hill, you should switch into a lower gear:
After you start moving downhill.
As you go downhill and pick up speed.
Before you start moving downhill.
Near the bottom of the hill.
Q.26.
Drivers may use ____ red reflective warning triangles when their vehicle is stopped on the side of the road.
Two
Three
Five
Seven
Q.27.
What can change the height of a vehicle?
Color
Length
Weight
Number of windows
Q.28.
If a load is 40 feet long, it must be secured by a minimum of ____ tie-downs.
Two
Three
Four
Five
Q.29.
A vehicle stopped at a green light may indicate that the driver:
Is impaired.
Is colorblind.
Does not know the rules of the road.
Is very patient.
Q.30.
Wheel rims that have been welded should:
Be placed in the front of the vehicle.
Be placed in the rear of the vehicle.
Be placed on dual tires.
Not be used.
Q.31.
Service brakes should:
Be tested once a month.
Only be tested by a trained mechanic.
Be tested before every trip.
Q.32.
What is aggressive driving?
Operating a vehicle in a selfish or pushy manner
Operating a vehicle with some regard for other motorists’ safety
Operating a vehicle in the left lane
Operating a loud vehicle
Q.33.
What must be done if a load is over-length?
A warning flag must be placed on the end of the load.
The load may only be transported between 6 p.m. and 3 a.m.
The load must be shortened.
The emergency flashers must be activated.
Q.34.
When transporting cargo, drivers must check the securement of the cargo every:
10 miles.
150 miles.
500 miles.
1,000 miles.
Q.35.
What should you do if the brake pedal does not build up pressure?
Upshift.
Downshift.
Hold the brake pedal down as far as it will go.
Pump the brakes.
Q.36.
During the steering box portion of the vehicle inspection test, you should not:
Ensure that the steering box is securely mounted.
Ensure that the steering box is free of leaks.
Look for missing bolts in the steering box.
Assume all cotter keys are present.
Q.37.
If your vehicle is equipped with a cargo lift, you should ensure that:
The lift is loosely attached.
The lift is not leaking.
The lift is fully extended.
The lift is the proper color.
Q.38.
A registered vehicle should have:
A mirror on the left side only.
Mirrors on both the left and right sides.
A mirror on the right side only.
Only a rearview mirror.
Q.39.
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.40.
When starting a vehicle with dual air brakes, pressure of ____ should be built up in the system before it is driven.
10 psi
25 psi
100 psi
200 psi
Q.41.
If you must stop on the side of a highway, how far behind your vehicle should warning devices be placed?
5, 15, and 30 feet
10, 25, and 50 feet
10, 100, and 200 feet
100, 200, and 500 feet
Q.42.
When approaching your vehicle, you should ensure that:
The vehicle is shiner than others.
The vehicle is not parked too closely to other vehicles.
There are not puddles under the vehicle that indicate a leak.
The vehicle is parked properly.
Q.43.
What is a tire load?
The minimum safe weight a tire can carry
The maximum safe weight a tire can carry
The weight of a tire
The weight of the air within a fully inflated tire
Q.44.
If required to complete a vehicle inspection report in writing, the report must be signed:
Every day.
Only if defects have been noted and certified to have been repaired.
Only if the repairs are estimated to cost more than $1,000.
Only if requested to do so by a law enforcement officer.
Q.45.
If you see lights ahead while driving in fog:
You can assume the lights are on the road.
It may be a reflection.
It may be an optical illusion.
The lights may not indicate where the road is as the vehicle may have pulled off the roadway.
Q.46.
What are placards?
Signs placed on a vehicle to identify cargo hazards
A type of tire used in snowy conditions
Logs kept inside the vehicle
Journals for mileage
Q.47.
Once stopped as part of the stop/start maneuver, you should:
Apply the parking brake.
Keep the vehicle in first gear.
Be perpendicular to the curb.
Be blocking a driveway.
Q.48.
When using mirrors while driving, you should:
Look in the mirrors quickly.
Look in the mirrors for extended periods of time.
Use only the rearview mirror.
Use only the driver’s side mirror.
Q.49.
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.50.
During the skills test, if making a turn that requires a stop, you should:
Skid to a stop.
Stop after the stop line to get a better view.
Allow your vehicle to roll.
Keep the front wheels aimed straight ahead.
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