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Iowa
Iowa CDL Knowledge Test Class B 2
Answers
Q.1.
When you must travel down a hill, when should you switch into a lower gear?
As you begin to move downward
As you go downhill and pick up speed
Before you start going downhill
Q.2.
If you have more than one license:
You likely won’t be caught.
You should not tell anyone.
You may get caught through the states' shared computer network.
Q.3.
Header boards:
Should never be used.
Protect the driver from being hit by cargo.
Protect the driver's head when entering the cab of a truck.
Q.4.
What is a drawback of retarders?
They may not be permitted everywhere.
They can help to slow a vehicle.
They cannot be turned off.
Q.5.
Overloading a vehicle with cargo:
Usually has no effect on the vehicle.
Can impact the vehicle's steering and brake control.
Can impact the vehicle's electrical system.
Q.6.
Pre-trip inspections should be done:
Differently each time in order to place emphasis on different items.
The same way each time to prevent you from forgetting anything.
Once in a while.
Q.7.
What is the minimum number of tie-downs required to secure a 10-foot piece of cargo?
One
Two
Three
Q.8.
When transporting a load, the cargo should be inspected:
Only at the beginning of a drive.
Only after driving a long distance.
After every break.
Q.9.
Rust around wheel nuts may mean:
The nuts are too tight.
The nuts are loose.
The tires should be replaced.
Q.10.
Dry bulk tanks:
Usually have low centers of gravity.
Usually have high centers of gravity.
Are usually not allowed to cross railroad tracks.
Q.11.
Rust around wheel nuts may mean:
It has rained recently.
The nuts could be loose.
The tires should be replaced.
Q.12.
If your vehicle is hydroplaning, you should:
Accelerate.
Not use the brakes.
Put the vehicle in reverse.
Q.13.
Backing with a trailer is dangerous because:
It is difficult to see behind the vehicle.
Most trucks do not have the ability to move in reverse.
Cargo may fall out of the trailer.
Q.14.
If a speed limit is posted, the posted speed:
Should never be exceeded.
May be exceeded if passing another vehicle.
May be exceeded if driving in a rural area.
Q.15.
A driver may have:
An automobile license from one state and a CDL from another.
Only one license.
Two licenses: one for automobiles and one for trucks.
Q.16.
When backing a truck, you should:
Only use the side mirrors on the driver’s side.
Use both side mirrors.
Never use a helper.
Q.17.
Scan the road ____ ahead of your vehicle.
Two to three seconds
Five to six seconds
12 to 15 seconds
Q.18.
Which of the following is a sign that brakes will need repair?
Brake pads are not covered in grease.
Brake pads are not covered in oil.
Brake shoes are worn thin.
Q.19.
Looking far ahead of your vehicle while driving is:
Discouraged, as there is little you can do about something far up the road.
Encouraged to help you identify hazards as early as possible.
Not permitted.
Q.20.
If the low air pressure warning signal comes on, you should:
Continue driving, but have the brakes repaired within a week.
Pull over and inspect the brakes.
Phone a mechanic while driving.
Q.21.
Texting while operating a CMV is:
Illegal.
Acceptable on rural roads.
Acceptable for drivers contacting their employers.
Q.22.
If you identify a distracted driver on the road, you should:
Tailgate them.
Flash your lights at them.
Give them plenty of space.
Q.23.
When leaving your vehicle unattended:
The parking brake must be always be used.
The parking brake should never be used.
Windows in the cab should be lowered.
Q.24.
When conducting a check of the engine compartment during a vehicle inspection, you should not:
Check the engine oil level.
Check the coolant level.
Drain the brake fluid.
Q.25.
Manual air tank drains should be:
Opened to drain the tanks after each day.
Left open while driving.
Sealed with glue.
Q.26.
____ is an example of required emergency equipment.
A spare electrical fuse
A loud horn
A battery-operated flashlight
Q.27.
Using an Anti-Lock Braking System (ABS):
Is required in some states.
Shortens brake response time.
Provides additional control.
Q.28.
When stopping a manual transmission vehicle, you should:
Push the clutch in when the engine is close to idle.
Push the clutch out when the engine is close to idle.
Shift into neutral when the engine is close to idle.
Q.29.
If you are disqualified from driving:
Your employer will be notified by the state.
You must notify your employer within two business days.
You must notify your employer within a month.
Q.30.
When should a driver sign a vehicle inspection report?
After every trip
If noted defects are repaired
After each fueling
Q.31.
When loading a trailer, it is important to:
Place as little weight as possible over the axles.
Place an appropriate amount of weight over the axles.
Not be concerned with how the cargo's weight is distributed.
Q.32.
When you are about to start down a hill, you should switch into a ____ gear.
Higher
Faster
Lower
Q.33.
Without the proper amount of oil in its engine:
A vehicle will have difficulty stopping.
A vehicle will make quick, jerking movements while being driven.
The engine may be quickly damaged.
Q.34.
Air brakes use ____ to function.
Compressed air
Liquid air
Nitrogen
Q.35.
During a pre-trip inspection, belts should be:
Left alone and not inspected.
Checked for tightness.
Inspected, but only about once a month.
Q.36.
When driving in hot weather:
The air pressure in tires will decrease.
The engine oil can help to keep the engine cool.
Antifreeze is not important.
Q.37.
Alcohol evaporators are:
Illegal.
Used to introduce alcohol into air brake systems.
Only allowed in the northern parts of the state.
Q.38.
If a vehicle is power steering-equipped, the hoses should be:
Checked for leaks.
Securely connected to the battery.
Carrying fuel.
Q.39.
When performing a pre-trip inspection and looking into the fifth wheel gap, you should:
Make sure the locking jaws are open.
Make sure the locking jaws are fully closed around the kingpin.
Make sure the locking jaws are loose.
Q.40.
When asked to make a lane change during the driving test, you should:
Make the change as soon as the examiner asks, without looking.
Use your turn signal and change lanes when safe.
Make the lane change as quickly as possible, even if that means cutting off another driver.
Q.41.
If you are convicted of a traffic violation:
The State will inform your employer.
You must tell your employer.
You must tell the shipper.
Q.42.
The two markings on a front brake limiting valve usually read:
"Normal" and "slippery."
"Low" and "high."
"Left" and "right."
Q.43.
When transporting a load, you should inspect the cargo:
Only before starting to drive.
At the end of each day.
Every time you take a break.
Q.44.
If you are being tailgated while driving a large vehicle, do all of the following, except:
Reduce your speed gradually.
Increase your following distance.
Increase your speed.
Q.45.
An empty truck:
Requires a shorter stopping distance than a full truck.
Requires a longer stopping distance than a full truck.
Takes the same distance to stop as a full truck.
Q.46.
Before entering a curve, you should:
Not use the mirrors.
Speed up.
Downshift.
Q.47.
Vehicles driving behind a truck:
May have difficulty seeing objects in front of the truck.
Often have a great view of the roadway in front of them.
Do not need to signal.
Q.48.
Blocking a load:
Is only done with liquid cargo.
Helps to stabilize the load
Is dangerous and should never be done.
Q.49.
Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.
Green
Blue
Yellow
Q.50.
Failing to drain air tanks could result in:
Water accumulations freezing and causing brake failure.
Squishy brakes.
Too much air collecting in the tanks.
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