New Hampshire CDL — General Knowledge: Road Signs Practice Test

Question 1

A new driver says acetone belongs with propane and helium under Gases. What does the manual's hazard class table show?

Accepted Answer

Acetone is a Class 3 (Flammable) example, while propane and helium are Class 2 — Propane, oxygen and helium are the Class 2 examples. Acetone sits with gasoline under Class 3, Flammable.

Answer

All three are Class 2 examples

Answer

Acetone is a Class 8 (Corrosives) example

Answer

None of the three appears on the table

Question 2

Uranium and plutonium are the examples given for which class on the manual's hazard class table?

Accepted Answer

Class 7, Radioactive — The table lists uranium and plutonium as its examples of Class 7, Radioactive.

Answer

Class 5, Oxidizers

Answer

Class 6, Poisons

Answer

Class 9, Miscellaneous Hazardous Materials

Question 3

A straight truck that requires hazardous materials placards shows one on the rear and one on each side, with nothing on the front. Does that meet the placard rule?

Accepted Answer

No, it needs at least four identical placards, including one on the front — A placarded vehicle carries a minimum of four identical placards, one each on the front, the rear and both sides. Leaving the front bare falls short.

Answer

Yes, three matching placards are enough

Answer

Yes, as long as the rear placard is the largest

Answer

No, it needs six placards, two on each side

Question 4

Which pair of products does the manual's hazard class table give as its examples of Flammable Solids?

Accepted Answer

Matches and fuses — Class 4, Flammable Solids, is illustrated by matches and fuses. Gasoline and acetone belong to Class 3, Flammable.

Answer

Gasoline and acetone

Answer

Fuel oils and lighter fluid

Answer

Hair spray and charcoal

Question 5

How does the manual say drivers find out where escape ramps are along a mountain downgrade?

Accepted Answer

Signs show where the ramps are — Signs point out the ramps, and the manual adds that you should already know the ramp locations along your route.

Answer

Ramps appear only on carrier dispatch maps

Answer

A flagger is stationed at each ramp

Answer

They are printed on the vehicle registration

Question 6

On a school bus, what does the inspection guide say the stop arm tells other drivers?

Accepted Answer

That the bus is stopping or is stopped — The stop arm warns other drivers that the school bus is stopping or has stopped. It works along with the student loading lights.

Answer

That the bus is carrying hazardous materials

Answer

That the bus is about to back up

Answer

That the bus is out of service

Question 7

Placards or orange panels on certain packagings carry a four-digit identification number. Which packagings does the manual say display it this way?

Accepted Answer

Cargo tanks and other bulk packaging — The four-digit number identifying the contents appears on a placard or orange panel on cargo tanks and other bulk packaging.

Answer

Any box that weighs more than 50 pounds

Answer

Only packages labeled as radioactive

Answer

Sealed containers of ordinary freight

Question 8

On a rural road you come up behind a farm tractor that displays a red triangle with an orange center. What should that emblem lead you to expect?

Accepted Answer

The vehicle is slow moving, so you will close on it quickly — That emblem is the slow moving vehicle symbol, used on machinery that travels well below normal speed. Spotting it early gives you time to slow down.

Answer

The tractor is about to turn left

Answer

The tractor is carrying hazardous materials

Answer

The road ahead is closed to trucks

Question 9

A freeway off ramp is posted at 30 mph. You are driving a heavily loaded tractor-trailer. How should you treat that posted speed?

Accepted Answer

As a speed that may suit cars but could be too fast for your vehicle — Ramp speed signs may suit automobiles and still be too fast for a large or heavily loaded vehicle, so you may need to go slower than the sign.

Answer

As the minimum speed for the ramp

Answer

As a limit that applies only at night

Answer

As a figure trucks may exceed by 5 mph

Question 10

A crossing is marked by a crossbuck but has no painted stop line. For a vehicle that is required to stop, what is the farthest from the nearest rail that the stop may be made?

Accepted Answer

50 feet — Without a stop line, a required stop is made at least 15 feet and at most 50 feet back, measured from the closest rail.

Answer

15 feet

Answer

25 feet

Answer

100 feet

Question 11

A road crosses several sets of tracks at one grade crossing. Where does the manual say a driver learns how many tracks there are?

Accepted Answer

From a sign below the crossbuck — Where a road crosses more than one track, a sign mounted under the crossbuck gives the number of tracks.

Answer

From the color of the crossing gates

Answer

From the number of stop lines painted on the road

Answer

From the shape of the advance warning sign

New Hampshire CDL — General Knowledge: Road Signs practice test

Study questions with answers

1. A new driver says acetone belongs with propane and helium under Gases. What does the manual's hazard class table show?

2. Uranium and plutonium are the examples given for which class on the manual's hazard class table?

3. A straight truck that requires hazardous materials placards shows one on the rear and one on each side, with nothing on the front. Does that meet the placard rule?

4. Which pair of products does the manual's hazard class table give as its examples of Flammable Solids?

5. How does the manual say drivers find out where escape ramps are along a mountain downgrade?

6. A round, black-on-yellow sign stands beside the road before any tracks are in view. Ahead of which kind of crossing does the manual say this sign is placed?

7. On a school bus, what does the inspection guide say the stop arm tells other drivers?

8. Placards or orange panels on certain packagings carry a four-digit identification number. Which packagings does the manual say display it this way?

9. On a rural road you come up behind a farm tractor that displays a red triangle with an orange center. What should that emblem lead you to expect?

10. A freeway off ramp is posted at 30 mph. You are driving a heavily loaded tractor-trailer. How should you treat that posted speed?

11. A crossing is marked by a crossbuck but has no painted stop line. For a vehicle that is required to stop, what is the farthest from the nearest rail that the stop may be made?

12. A road crosses several sets of tracks at one grade crossing. Where does the manual say a driver learns how many tracks there are?

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