Can be helpful to see a wider area.

Cannot be used on vehicles transporting hazardous materials.

Are illegal to be used in most states.

Should be tested before a drive.

Should be tested, but only after driving a distance.

Pennsylvania CDL Hazmat 2 - DMV Written Test Questions with Answers

Q.1

When loading compressed gas, the liquid discharge valves should be:

Closed.
Greased.
Open.
Removed.

Q.2

If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:

Check for wheel speed sensors coming from the back of the brakes.
Look for a red light on the front right corner of the converter dolly.
Pump the air brakes to activate the ABS.
Assume the vehicle has ABS.

Q.3

The most important reason to inspect your vehicle before a trip is:

To ensure safety.
To maximize gas mileage.
To wake up before the drive.
To fill up time.

Q.4

When checking the engine compartment:

The parking brake should not be engaged.
Wheels should be chocked.
The engine should be running.
The gearshift should be in first gear.

Q.5

When driving, your mirrors should:

Not be used, as they are distracting.
Not be used unless there is traffic.
Be checked regularly.
Be checked regularly, but only if it is cloudy.

Q.6

Move over laws require:

Trucks to use the left lane.
All vehicles to vacate the lane closest to an emergency vehicle that is stopped with its lights flashing.
All vehicles to use the left lane.
All vehicles to move to the left lane if a flatbed trailer is in the right lane.

Q.7

What can rust around the wheel nuts indicate?

That the nuts are loose.
That the nuts are wet.
That the nuts need to be replaced.
That the nuts are the wrong size.

Q.8

When entering or crossing traffic while driving a combination vehicle, it is especially important that you:

Sound your horn.
Make sure there is a large enough gap for your vehicle.
Expect other drivers to make room for your vehicle.
Let other drivers wave you into their lane.

Q.9

Hazardous materials may be transported:

By any driver with a CDL.
By any driver, as long as the total weight of the hazardous materials are under 50 pounds.
By any driver in a rural area.
By a driver with a CDL and HazMat endorsement.

Q.10

When checking a tank vehicle, it is most important to verify that:

There are no leaks.
There is no frost on the windshield.
The paint is not cracking.
The tires are new.

Q.11

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.12

If transporting chlorine, what must be kept in the vehicle?

A phone with emergency numbers programmed
An approved gas mask
A chemical suit
Directions for emergency personnel

Q.13

Parking brakes:

Should not be tested.
Should be tested, but only after driving a distance.
Should be tested before a drive.
Should be tested on a hill.

Q.14

While inspecting a coupling, you should go under the trailer and:

Detach the jaws from around the kingpin.
Make sure the locking lever is in the "emergency" position.
Remove the safety latch.
Look into the back of the fifth wheel.

Q.15

A pre-trip inspection:

Should never be completed the same way two times in a row.
Should always be completed in the same order.
Should only be done if it is sunny outside.
Should not be done if the driver thinks the vehicle is in good operating order.

Q.16

To control a surge, brakes should:

Not be used.
Not be released too quickly after stopping.
Be used firmly and then released.
Be used with the parking brake.

Q.17

After finishing a pre-trip inspection, you should:

Close the service line valve.
Remove the service line valve.
Leave the emergency line valve open.
Leave the rear shut-off valves open.

Q.18

An Anti-Lock Braking System (ABS):

Allows wheels to lock up.
Prevents wheels from locking up.
Makes it easier to turn a large vehicle.
Assists with the operation of brake lights.

Q.19

If you are confronted by an aggressive driver, you should:

Make eye contact with the driver.
Stay in the driver's lane.
Try to race the driver.
Ignore the driver's gestures.

Q.20

If transporting a package that contains radioactive materials, it is important to know that:

Radiation will pass through to other packages.
The packages should be carried in the cab.
The packages should be loaded on their side.
You cannot use bridges.

Q.21

What should a carrier do if hazardous materials are not properly prepared?

Accept the shipment
Accept the shipment under protest
Accept the shipment, but make a notation on the paperwork
Refuse the shipment

Q.22

If a traffic light has been green for a long time:

It will probably stay green as you approach.
It is likely broken.
It is likely that the light will soon change to yellow.
It is likely the light will skip yellow and change from green to red.

Q.23

In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:

Air pressure drops to a level between 20 and 45 psi.
You are experiencing a trailer jackknife.
Wheels have regained traction after a skid.
Air pressure is above 45 psi.

Q.24

Why should your mirrors be adjusted to show the road behind you as well as part of your vehicle?

Having only the road in the mirrors would likely make the driver carsick.
Having part of the truck in the mirrors serves as a point of reference.
It is illegal to have only the road in the mirrors.
The driver should be able to see the reflection of surrounding vehicles on the trailer.

Q.25

If another driver is following you too closely, you should do all of the following, except:

Avoid quick changes.
Increase the distance between you and the vehicle in front of you.
Speed up.
Avoid relying on tricks to help others pass.

Q.26

When loading a tank, space should be left for outage. What is outage?

Extra cargo
Space for expanding liquids
Space for additional fuel
A place for luggage and personal items

Q.27

If unsure if a road is becoming icy, a driver can:

Guess.
Open the window and check the front of the mirror for ice.
Try to look at the road closely.
Look at a weather forecast.

Q.28

One way to prevent a rollover is to:

Move cargo to the left side of the rig.
Keep cargo centered on the rig.
Move cargo to the right side of the rig.
Keep cargo as far from the ground as possible.

Q.29

When starting a vehicle, the coolant temperature gauge should:

Not change from its original position.
Gradually rise to the normal operating range.
Jump quickly to the normal operating range.
Flash until it reaches the normal operating range.

Q.30

Multi-speed axles and auxiliary transmissions are used:

To make a vehicle run more smoothly.
To provide extra gears.
To get improved gas mileage.
To make a vehicle less noisy.