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Texas CNG(Compressed Natural Gas) Driver Practice
Practice mode
Question
1
of 25
QUESTION 1 / 25
What must not be compromised while securing fuel containers?
Choose one answer below.
A
The strength of the vehicle floor
✓
B
The strength of the mounting frame
✓
C
The strength of the vehicle structure
✓
D
The aesthetic appearance of the vehicle
✓
QUESTION 2 / 25
Which type of manometer is recommended for measuring high-pressure gases?
Choose one answer below.
A
Digital manometer
✓
B
U-tube manometer
✓
C
Bourdon gauge
✓
D
Inclined manometer
✓
QUESTION 3 / 25
Can CNG be used in hybrid vehicles?
Choose one answer below.
A
No, it can only be used in conventional vehicles
✓
B
Yes, in specially designed alternative fuel hybrids
✓
C
Yes, but it requires extensive modifications
✓
D
No, hybrids must use gasoline only
✓
QUESTION 4 / 25
Can CNG vehicles be converted from gasoline or diesel?
Choose one answer below.
A
No, they are only designed to run on CNG
✓
B
Yes, many can be retrofitted
✓
C
Only heavy-duty vehicles can be converted
✓
D
Conversion is illegal in Texas
✓
QUESTION 5 / 25
What should be avoided in the selection of hoses for CNG applications?
Choose one answer below.
A
Hoses with high pressure ratings
✓
B
Hoses made of unknown materials
✓
C
Corrosion-resistant hoses
✓
D
Flexible metal hoses
✓
QUESTION 6 / 25
What is the effect of CNG on engine longevity?
Choose one answer below.
A
CNG causes faster engine wear
✓
B
CNG has no impact on engine longevity
✓
C
CNG generally leads to longer engine life
✓
D
CNG shortens engine life due to high pressure
✓
QUESTION 7 / 25
What is the requirement for CNG storage cylinders that are not connected for use?
Choose one answer below.
A
They must be stored indoors.
✓
B
They should be painted red.
✓
C
They must be secured with a lock.
✓
D
They need to be fenced in a protected area outdoors.
✓
QUESTION 8 / 25
What should be included in a CNG pre-trip inspection?
Choose one answer below.
A
Checking the fuel efficiency of the engine
✓
B
Checking for leaks, tank integrity, and proper functioning of systems
✓
C
Checking the color of the engine oil
✓
D
Checking tire tread depth only
✓
QUESTION 9 / 25
What is a common misconception about CNG safety?
Choose one answer below.
A
That it is completely risk-free
✓
B
That it is more dangerous than gasoline
✓
C
That it requires no special handling
✓
D
That it cannot be used in cold climates
✓
QUESTION 10 / 25
What is the typical range of a CNG vehicle on a full tank?
Choose one answer below.
A
50 to 100 miles
✓
B
150 to 200 miles
✓
C
250 to 400 miles
✓
D
500 to 600 miles
✓
QUESTION 11 / 25
Which components are included in a CNG system?
Choose one answer below.
A
Only cylinders and valves
✓
B
Safety devices, cylinders, piping, and fittings
✓
C
Just compressors and regulators
✓
D
Only gauges and relief devices
✓
QUESTION 12 / 25
What environmental benefit does using CNG offer compared to traditional fuels?
Choose one answer below.
A
Higher emissions of sulfur oxides
✓
B
Lower carbon dioxide emissions
✓
C
Higher greenhouse gas emissions
✓
D
No difference in emissions
✓
QUESTION 13 / 25
Who regulates the transportation of CNG in Texas?
Choose one answer below.
A
The Texas Railroad Commission
✓
B
The Environmental Protection Agency
✓
C
Local municipalities
✓
D
The Texas Commission on Environmental Quality
✓
QUESTION 14 / 25
For what type of facility is emergency manual shutdown crucial?
Choose one answer below.
A
Gas distribution centers
✓
B
Residential fueling facilities
✓
C
Industrial gas processing plants
✓
D
Commercial fueling stations
✓
QUESTION 15 / 25
Which material must be used for corner posts in fencing near combustible materials?
Choose one answer below.
A
Wood
✓
B
Plastic
✓
C
Noncombustible material
✓
D
Any material is acceptable
✓
QUESTION 16 / 25
What are the conditions that must be avoided for the effective operation of pressure regulators?
Choose one answer below.
A
Excessive heat and humidity
✓
B
Operating under pressure fluctuations
✓
C
Freezing rain, sleet, snow, ice, mud or debris
✓
D
Lack of proper ventilation
✓
QUESTION 17 / 25
What must be ensured regarding the maintenance of equipment at CNG installations?
Choose one answer below.
A
It must be easily accessible at all times
✓
B
It must be protected from tampering and maintained in good condition
✓
C
It can be left unattended for long periods
✓
D
It must be painted for visibility
✓
QUESTION 18 / 25
What must all connections to fuel supply cylinders external to the driver compartment be?
Choose one answer below.
A
Loose and flexible
✓
B
Sealed and vented from those compartments
✓
C
Accessible from inside the vehicle
✓
D
Non-functional and decorative
✓
QUESTION 19 / 25
Which instructions must be followed for CNG residential fueling facilities?
Choose one answer below.
A
Follow general public safety codes
✓
B
Adhere to the manufacturer's instructions
✓
C
Only follow verbal instructions
✓
D
Ignore equipment manufacturer's guidelines
✓
QUESTION 20 / 25
What protective measure must be taken when using stray or impressed currents?
Choose one answer below.
A
Ignition prevention measures
✓
B
No specific measures are required
✓
C
Checking electrical resistance
✓
D
Use of insulated piping
✓
QUESTION 21 / 25
What must be done before refueling a CNG vehicle?
Choose one answer below.
A
Turn off the hazard lights
✓
B
Ensure the vehicle is parked safely and the engine is turned off
✓
C
Increase tire pressure
✓
D
Open the windows
✓
QUESTION 22 / 25
Which section outlines regulations for fencing and guardrails at CNG facilities?
Choose one answer below.
A
Section 13.32
✓
B
Section 13.93
✓
C
Section 13.94
✓
D
Section 13.133
✓
QUESTION 23 / 25
Where can drivers find CNG fueling stations?
Choose one answer below.
A
Only through government websites
✓
B
At licensed automotive repair shops
✓
C
Various app services and websites
✓
D
Only at gas stations with standard fuel
✓
QUESTION 24 / 25
Hoop wrapped composite cylinders must comply with which DOT standard?
Choose one answer below.
A
DOT FRP1 standard
✓
B
DOT FRP2 standard
✓
C
DOT 3AA specifications
✓
D
ASME Boiler Code
✓
QUESTION 25 / 25
How can fuel supply installation minimize collision damage regarding clearance?
Choose one answer below.
A
Installing it at the highest point possible
✓
B
Keeping it as low to the ground as possible
✓
C
Ensuring as much ground clearance as practical
✓
D
By allowing it to extend below the frame
✓
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