CNG CNG Fleet Management and Driver Operations

Question 1

Before fueling a CNG vehicle, a driver should first verify which condition?

Accepted Answer

The vehicle engine is turned off

Answer

The fuel tank is completely empty

Answer

The dispensing nozzle is at maximum pressure

Answer

The vehicle is in drive gear

Question 2

What does a CNG vehicle's fuel gauge reading in GGE allow fleet managers to determine?

Accepted Answer

Estimated driving range compared to an equivalent gasoline vehicle

Answer

The cylinder burst pressure rating

Answer

The number of cylinders installed

Answer

Current ambient temperature compensation

Question 3

Which pre-trip inspection item is unique to CNG vehicles that gasoline vehicle drivers do not need to perform?

Accepted Answer

Visual inspection of CNG cylinders and fuel lines for damage or leaks

Answer

Checking tire pressure

Answer

Inspecting windshield wipers

Answer

Verifying brake fluid level

Question 4

If a CNG driver smells natural gas inside the vehicle cab while driving, what is the correct immediate action?

Accepted Answer

Pull over safely, turn off the engine, exit the vehicle, and call for assistance

Answer

Accelerate to ventilate the cab with airflow

Answer

Turn on the air conditioning recirculation mode

Answer

Continue driving to the nearest service station

Question 5

Which document must CNG commercial vehicle operators carry to comply with DOT Hazardous Materials Regulations when transporting CNG as cargo?

Accepted Answer

Shipping papers describing the compressed natural gas per 49 CFR Part 172

Answer

A state driver's license only

Answer

An EPA emissions certificate

Answer

A NFPA 52 inspection sticker

Question 6

What is the purpose of a CNG vehicle's manual fuel shutoff valve, and when should a driver use it?

Accepted Answer

It stops fuel flow from the cylinder in an emergency or during maintenance

Answer

It increases fuel pressure to the engine for better performance

Answer

It resets the fuel gauge to full

Answer

It vents excess pressure to the atmosphere automatically