CDL Practice Test Quiz Latest Updated
with Complete Solutions
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
...
CDL Practice Test Quiz Latest Updated
with Complete Solutions
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. Correct Answer-50
Who is responsible for safely transporting a hazardous material shipment without delay and keeping the
shipping papers in the right place? Correct Answer-the driver
You find an overheated tire during an enroute inspection. If you are hauling hazardous materials, you
must: Correct Answer-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: Correct
Answer-to communicate the risk
The total transport index of all radioactive material packages in a single vehicle must not exceed ____.
Correct Answer-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: Correct Answer-before starting the trip
Which three hazard classes should not be loaded into a trailer that has a heater / air conditioner unit.
Correct Answer-flammable liquids
flammable gas
explosives
What is the only exception to certification by a shipper? Correct Answer-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 Answer-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 Answer-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-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-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-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-Correct Answer: Use controlled or stab braking
Converter dollies: Correct Answer-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-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 ____. Correct Answer-closed, latched
When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig
straight? Correct Answer-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-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: Correct Answer-: 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? Correct Answer-none
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