CDL Practice Test
A railroad crossing is ahead of you and you are hauling hazardous material. When you
stop for the crossing, you can stop as far away as ____ feet from the nearest rail. –
50
Who is responsible for safely transporting a hazardous material shipment without delay
and keeping the shipping papers in the right place? –
the driver
You find an overheated tire during an enroute inspection. If you are hauling hazardous
materials, you must: -
Remove the tire and place it a safe distance from the vehicle.
The intent of hazardous materials regulations is to ensure safety, to contain the
material, and: -
to communicate the risk
The total transport index of all radioactive material packages in a single vehicle must not
exceed ____. –
50
You are going to be hauling hazardous materials over a route you do not know well.
When should you check the route and get the permits needed for the trip: -
before starting the trip
Which three hazard classes should not be loaded into a trailer that has a heater / air
conditioner unit. –
flammable liquids
flammable gas
explosives
What is the only exception to certification by a shipper? –
Correct When the shipper is a private carrier of his own product.
A truck carrying explosives has crashed with another vehicle. You should not pull them
apart until. –
correct The explosives have been placed at least 200 feet away from the vehicles and
occupied buildings.
When handling packages of explosives, you must: -
Correct Never use hooks or other metal tools
, When driving with more than one trailer, which trailer should be the first one behind the
tractor? –
correct Answer: The heaviest trailer
You are driving a 100 foot twin trailer combination at 50 mph. The road is dry and the
visibility is good. You should keep at least ____ seconds of space ahead of you. -
Correct Answer: 11
With the hand valve on, you should test the trailer brakes by opening the service line
valve at the rear of the rig. When you do this, you should hear: -
Correct Answer: Air escape from the open valve
You are driving with double trailers and must use your brakes to avoid a crash. For
emergency braking you should: -
Correct Answer: Use controlled or stab braking
Converter dollies: -
Correct Answer: Often do not have spring brakes
The crack the whip effect that troubles trucks with trailers. Which is most likely to tip
over: -
Correct Answer: The rear trailer of a triple
You are doing a walk around inspection of a double or triple trailer rig. You should be
sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. –
closed, latched
When does the "driver's manual" advise disconnecting the steering axle brakes to help
keep the rig straight? –
Correct Answer: Never
If a converter dolly is still under the second trailer and you unlock the pintle hook, what
will probably happen? –
Correct Answer: The dolly tow bar may fly up
You are driving with double trailers and must use your brakes to avoid a crash. For
emergency braking you should: - :
Use controlled or stab braking
You are visually checking the coupling of a converter dolly to the rear trailer. How much
space should be between the upper and lower fifth wheel? –
none
When should you check your mirrors while making a lane change? –
...a. After signaling the change
b. Right after starting the lane change
A railroad crossing is ahead of you and you are hauling hazardous material. When you
stop for the crossing, you can stop as far away as ____ feet from the nearest rail. –
50
Who is responsible for safely transporting a hazardous material shipment without delay
and keeping the shipping papers in the right place? –
the driver
You find an overheated tire during an enroute inspection. If you are hauling hazardous
materials, you must: -
Remove the tire and place it a safe distance from the vehicle.
The intent of hazardous materials regulations is to ensure safety, to contain the
material, and: -
to communicate the risk
The total transport index of all radioactive material packages in a single vehicle must not
exceed ____. –
50
You are going to be hauling hazardous materials over a route you do not know well.
When should you check the route and get the permits needed for the trip: -
before starting the trip
Which three hazard classes should not be loaded into a trailer that has a heater / air
conditioner unit. –
flammable liquids
flammable gas
explosives
What is the only exception to certification by a shipper? –
Correct When the shipper is a private carrier of his own product.
A truck carrying explosives has crashed with another vehicle. You should not pull them
apart until. –
correct The explosives have been placed at least 200 feet away from the vehicles and
occupied buildings.
When handling packages of explosives, you must: -
Correct Never use hooks or other metal tools
, When driving with more than one trailer, which trailer should be the first one behind the
tractor? –
correct Answer: The heaviest trailer
You are driving a 100 foot twin trailer combination at 50 mph. The road is dry and the
visibility is good. You should keep at least ____ seconds of space ahead of you. -
Correct Answer: 11
With the hand valve on, you should test the trailer brakes by opening the service line
valve at the rear of the rig. When you do this, you should hear: -
Correct Answer: Air escape from the open valve
You are driving with double trailers and must use your brakes to avoid a crash. For
emergency braking you should: -
Correct Answer: Use controlled or stab braking
Converter dollies: -
Correct Answer: Often do not have spring brakes
The crack the whip effect that troubles trucks with trailers. Which is most likely to tip
over: -
Correct Answer: The rear trailer of a triple
You are doing a walk around inspection of a double or triple trailer rig. You should be
sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. –
closed, latched
When does the "driver's manual" advise disconnecting the steering axle brakes to help
keep the rig straight? –
Correct Answer: Never
If a converter dolly is still under the second trailer and you unlock the pintle hook, what
will probably happen? –
Correct Answer: The dolly tow bar may fly up
You are driving with double trailers and must use your brakes to avoid a crash. For
emergency braking you should: - :
Use controlled or stab braking
You are visually checking the coupling of a converter dolly to the rear trailer. How much
space should be between the upper and lower fifth wheel? –
none
When should you check your mirrors while making a lane change? –
...a. After signaling the change
b. Right after starting the lane change
