General Knowledge 9

Why must you keep shipping papers related to hazardous materials in special places?

Because they must be dispatched first.
In case there are no placards.
Because you must know what products you can load together, and which you cannot.
If the driver is in an accident and cannot speak, people must know the hazards involved.

ome vehicles have automatic transmissions. Why is it important to select a low range when downloading grades?

To allow the transmission to move upwards
To achieve greater braking of the engine.
To avoid the hydrofoil.
To avoid hydraulic brake failure.

How much tread depth should you have on your front tires when driving in the winter?

Minimum of 4/32 inch
Under 4/32 inch
Minimum of 2/32 inch
Maximum of 2/32 inch

How to avoid backing while standing on a slope.

Actuate the clutch.
Switch to neutral
Set the parking brake.
Pump the accelerator hard

Dry bulk tanks and hanging meat ______

Have really low centers of gravity.
Handle better on sharp turns.
Are unstable loads.
Do not require any special care.

To check the clutch/gearshift you must

Start engine, then release clutch slowly
Depress clutch
Place gearshift lever in neutral
All of these answers

Which of these is Not true about stopping in an emergency situation

It doesn't matter how you brake on an emergency situation
You should brake to keep straight your vehicle
Yo should avoid using the brakes until your speed has dropped to about 40 mph

If you have a car following you too close, behind your commercial vehicle, you must

It is the law.
Communicate the risk.
So hazmat is not mixed with food.
To prevent terrorism.

Hauling liquids in tank vehicles requires special care because?

Uneven expansion
Extreme weight
Liquid movement
Winds

To prevent brake fading, you must:

1/2 psi per minute
3 psi per minute
2 psi per minute
4 psi per minute

You can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does the marking mean?

The vehicle is hauling hazardous materials
It may be a slow moving vehicle
It is driving by a student

The following statements approximately an engine overheating are TRUE EXCEPT…

Antifreeze is only used in colder temperatures
If you can touch the radiator cap with your bare hand, it is probably cool enough to open.
It is not possible to safely drive without radiator fluid
Never leave the engine running if it is overheating

Before beginning a trip, you should always:

Verify that the cargo is secured.
Check all lights and safety equipment.
Test your steering and brake systems.
All of the above.

What is the total downtime when driving a heavy vehicle on dry pavement at 55 mph?

4 1/2 seconds
5 seconds
6 seconds
7 1/2 seconds

In an accident, you should remember to do the following EXCEPT…

Move the victims out of the way immediately
Protect the area
Notify authorities
Stop any bleeding and keep the victims warm

Because you can not inspect sealed cargoes you must:

May exceed the gross weight and axle weight limits
Must be less than 50 pounds weight limits.
Requires special mooring devices
You must verify that you do not exceed the gross weight and axle weight limits.

In the event of a cargo fire in a van or box trailer, you must

Keep the doors closed
Keep the doors open
Drive to the closest service station for help
Park close to the road so other vehicles can see the danger and call to the firemen

Which controlled braking methods do you use to stop quickly and safely?

Apply the brakes hard and lock the wheels.
Apply the brakes as hard as you can ando don't locking the wheels.
Apply the brakes and make big steering adjustments.
Apply the brakes but keep them released and make steering adjustments.

The top it takes to prevent in exemplar conditions once the brakes are applied is?

Reaction distance.
Perception distance.
Stopping distance.
Braking distance.

You are driving on slippery ice. Your rear-wheel drive wheels lock and you start skating. What action should you take?

Remove the foot from the accelerator and press the brake.
Remove the foot from the accelerator and press the clutch.
Brake hard and get off the road.
Change to neutral.

Which of the following statements about the control of speed and braking is true?

You need 4 times more distance to brake at 40 mph than at 20 mph
The time required to stop increases two seconds for every 10 miles per hour to more than 22 mph
The total distance to stop a bus is the distance it takes to stop once the brakes are applied
None of the above.

About drive skids of rear wheels are true to say that ______.

With vehicles towing trailers, the trailer can push the towing vehicle sideways.
Locked wheels have more traction than rolling wheels.
The front wheels usually slide sideways in an attempt to 'catch up'.
All of the above.

If the steering feels hard, it is probably a sign of

A battery failure.
Some tire problems.
Shabby brakes.
Engine issues.

Which of these statements about backing a heavy vehicle is true?

You should avoid backing whenever you can
It is safer back toward the right side of the truck than toward the driver's side
Helpers should be out of the driver's sight,and use only voice (spoken) signals to communicate with the driver

What is the reason that placards are used in HazMat?

Communicate the risk.
So hazmat is not mixed with food.
It is the law.
To prevent terrorism.

The danger zone of a school bus extends up to 30 feet since:

The left side of the bus
The right side of the bus
The rear bumper of the bus.
The front bumper of the bus.

The blood alcohol concentration or BAC is determined for a person you need to knowTR

How often does the person drinks alcohol
How much the person weights
How old the person is

Your brakes have failed on a downgrade. Using an escape ramp, downshifting and ____________________ are helpful in slowing the commercial vehicle “semi truck” .

countersteering
shifting to a higher gear
using the braking effect of the engine
using your horn

What is the capacity of the coupling device

Maximum safe weight that a tire can carry at a specific pressure
Maximum weight that the device can pull and / or load.
Weight capacity of the suspension system manufacturer.
Weight transmitted to the ground by an axle or a set of axles.

Which of the from that day forward does not cause front wheel skids?

Driving too fast for conditions.
Lack of tread on the front tires.
Not enough weight is on the steer axle.
Not enough weight on the tandem trailer axle.

What to do when backing a trailer

Turn the steering wheel to the direction you want to go.
Turn the steering wheel in the opposite direction you want to go.
Turn and go back to the right side.
Use the highest reverse gear.

Because they are lighter, hollow trucks have the exceptional braking.

TRUE
FALSE

To acknowledge a drive-wheel braking skid you should?

Pump the brake
Steer in the opposite direction
Release the brake and steer/counter-steer
Accelerate quickly!

When should you downshift automatic transmissions?

When approaching any stop.
On icy roads.
When driving on dirt roads.
When going down grades.

You are approaching a commercial vehicle “semi-truck” for a pre-trip inspection. What should be your first step?

Starting the engine
Fastening your seatbelt
Putting the vehicle key in your pocket
Writing a report on the condition of the vehicle

Complete front header boards can protect the driver from cargo in the situation of a crash or a sudden stop?

True
False

You can find hazardous materials when seeing ______ on the container

Color
Shape
Label
Flag

You are driving on a highway and your front tire has just blown out. After that, you should

brake as hard as you can.
pump the brakes quickly
stay off the brake until you have slowed down the vehicle.
keep on driving until you find a gas station.

A poor weight balance can make the handling of the vehicle unsafe; this is due to?

Sub-charged front axles.
Very little weight in the drive axles
Too much weight on the steering axle.
A high center of gravity

If you must stop on the try of the route, you should place warning devices at for the most part of the following places except…

Within ten feet of the front or rear corners
About 100 feet behind your vehicle
About 100 feet in front of your vehicle
On the other side of a divided highway

Which of these is Not true about stopping on an emergency situation

It doesn't matter how you brake on an emergency situation
You should brake to keep straight your vehicle
Yo should avoid using the brakes until your speed has dropped to about 40 mph

What is the goal of the exhaust system that should be checked?

A leaking exhaust system can allow poisonous fumes into the cab
A leaking exhaust system can promote poor fuel mileage
A leaking exhaust system can be caused by snow and rain
A leaking exhaust system can hamper your visibility

You can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does the marking mean?

The vehicle is hauling hazardous materials
It may be a slow moving vehicle
It is driving by a student

When accelerating?

Always use the parking brake to slow down
Do not engage the clutch before you take your foot off the brake
Speed up smoothly and gradually and avoid jerking
"Hammer down" when your wheels start to spin

Which of this emergency equipment must be carried in the truck at all times?

A fully charged 5 B:C fire extinguisher
Reflective warning triangles
Spare electrical fuses
All answers are correct

Where and when is it best to downshift?

After starting up a hill
After starting down a hill
Before entering a curve
Before speeding up

To extinguish an electric fire that must be done:

Use a lot of water
Use extinguisher A: B: C over the flames of the fire.
Use extinguisher B: C at the base of the fire
Stop at a service station and wait for qualified firefighters

Coffee and a little fresh air will hold a drinker restrained up.

True
False

Truck escape ramps:

Cannot be used by certain types of heavy vehicles.
Are designed to protect vehicles from damage.
Should not be used unless you have first tried all other ways to save your vehicle after brake failure.

If a quarter of a multi-leaf spring is missing, it is more likely to happen?

It will cause a pop-pop-pop sound.
Will put the vehicle out of service
It will be difficult to direct
It will have no effect.

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