PA Commercial Driver's License Test

Questions and Answers

What is the most important reason you should inspect your vehicle before hitting the road?

Safety

How much tread depth is required for the front tires?

4/32

How much tread depth is required on all other tires than the front?

2/32

What are 3 pieces of emergency equipment that should be equipped inboard the vehicle?

Fire extinguisher, 3 triangles, spare fuses Signup and view all the answers

You should inspect your cargo within the 1st miles of a trip and every miles or every __ hours of a trip.

50, 150, 3 Signup and view all the answers

From what side should you back up and why?

The driver's side, so you can see better Signup and view all the answers

What is one thing you should do when using a helper to back up the vehicle?

Workout hand signals Signup and view all the answers

What is the most important hand signal to workout when working with a helper to back up a vehicle?

Stop Signup and view all the answers

What are the two ways to know when you shift?

Engine speed 'rpm' and road speed 'mph' Signup and view all the answers

What should you watch when you use engine speed to shift up?

Tachometer Signup and view all the answers

When should you shift when approaching a downgrade or curve?

Shift before going down a hill or entering a curve Signup and view all the answers

What do retarders help do?

Reduce the need of the brakes Signup and view all the answers

How many seconds does a good driver look ahead?

12 to 15 seconds Signup and view all the answers

When on a highway, how far away do good drivers look?

1/4 mile in front of them Signup and view all the answers

What should you look for when you look ahead?

Traffic and bad road conditions Signup and view all the answers

On a one-way road or a divided highway, where should your reflective triangles be placed in regards to the vehicle?

10 ft, 100 ft, and 200 ft behind the vehicle Signup and view all the answers

On a 2-way road or undivided highway, where do your reflective triangles need to be placed?

Within 10 feet in front or behind the vehicle and 100 ft in front and behind the vehicle Signup and view all the answers

What three things make up the total stopping distance?

Perception distance, reaction distance, braking distance Signup and view all the answers

When making a left turn, and there are 2 lanes, what lane should you take?

The right lane Signup and view all the answers

According to the manual, what is considered a hazard?

Any condition that causes the trip to be unsafe Signup and view all the answers

_ second(s) is required for each __ feet of vehicle length at speeds under 40 mph.

1, 10 Signup and view all the answers

Above 40 mph, use the same formula, then add ____ second for the additional speed.

1 Signup and view all the answers

What are 4 things that could make up a hazardous road?

Work zones, drop offs, foreign objects, off/on ramps Signup and view all the answers

What should you always have when you come across a hazardous road or something hazardous in the road?

A plan Signup and view all the answers

When you are in a driving emergency, what should you avoid until the speed of the vehicle is below 20 mph?

Braking Signup and view all the answers

When you have to brake quickly, how should you brake?

So the vehicle is kept in a straight line Signup and view all the answers

What are the two safest ways to brake when you have to do so quickly?

Controlled braking and stab braking Signup and view all the answers

What should you do when you have a tire that failed?

Hold the steering wheel firmly, stay off the brakes, check the tires after coming to a complete stop Signup and view all the answers

Study Notes

Vehicle Safety and Inspection

Inspecting the vehicle before driving is crucial for ensuring safety on the road.
Front tires must have a tread depth of at least 4/32 inches to maintain grip.
All other tires require a minimum tread depth of 2/32 inches.

Emergency Equipment

Essential emergency equipment includes a fire extinguisher, three reflective triangles, and spare fuses.

Cargo Inspection

Inspect cargo within the first 50 miles of a trip and then every 150 miles or every three hours.

Backing Up Safely

It is recommended to back up from the driver's side for better visibility.
Use hand signals to communicate with a helper when backing up, emphasizing the importance of the "stop" signal.

Shifting Gears

Key indicators for shifting gears include monitoring engine speed (RPM) and road speed (MPH).
A tachometer should be observed for engine speed when shifting upward.
Shift gears before approaching downgrades or curves to maintain control.

Retarders and Braking

Retarders assist in reducing brake usage, enhancing safety.
Good drivers scan the road 12 to 15 seconds ahead, or approximately 1/4 mile on highways.

Distance Awareness

Stay vigilant for traffic and poor road conditions when looking ahead.
Reflective triangles must be placed correctly: 10 feet, 100 feet, and 200 feet behind on one-way roads, and within 10 feet in front or behind on two-way roads.

Stopping Distance

Total stopping distance comprises perception distance, reaction distance, and braking distance.
For vehicles under 40 mph, allow 1 second for each 10 feet of length; for speeds above 40 mph, add 1 additional second.

Hazard Awareness

Hazards include any condition that compromises safe driving, such as work zones, drop-offs, foreign objects, and ramps.
Always have a plan when approaching hazardous road conditions.

Emergency Braking

In an emergency, avoid braking until the vehicle speed is below 20 mph to maintain control.
Brake quickly yet carefully to keep the vehicle moving in a straight line.
Controlled braking and stab braking are the safest techniques for emergency stopping.

Tire Failure Response

In the event of a tire failure, hold the steering wheel firmly, refrain from braking immediately, and inspect the tires once stopped.

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Description

Prepare for the Pennsylvania Commercial Driver's License written test with this quiz focused on essential knowledge such as vehicle inspection and safety standards. Each flashcard addresses critical questions regarding tire tread depth and required safety equipment. Test your understanding and ensure you are prepared for the exam.