North Carolina (NC) (PU) Fuel
Distribution Practice Exam Questions
With Correct Solutions, Already Passed!!
1. A retail fuel dispenser in North Carolina must have an emergency shear valve installed
directly below the dispenser. What is the primary purpose of this valve?
A) To prevent unauthorized fuel dispensing after hours
B) To automatically shut off fuel flow if the dispenser is struck and knocked over
C) To filter particulates before fuel enters the vehicle
D) To measure the exact volume of fuel dispensed
Answer: B
Explanation: Emergency shear valves are designed to sever and seal the fuel line in the
event of a dispenser impact, preventing a major fuel spill and fire hazard. NC fire codes
mandate them for all retail dispensers.
2. Under NC regulations, which agency has primary enforcement authority for
underground storage tank (UST) rules at fuel distribution facilities?
A) NC Department of Environmental Quality (DEQ)
B) NC Department of Transportation (NCDOT)
C) NC Office of State Fire Marshal (OSFM)
D) NC Department of Agriculture
Answer: A
Explanation: The NC DEQ’s Underground Storage Tank Section enforces UST rules
,including leak detection, corrosion protection, and spill prevention, under authority
delegated by the EPA.
3. A fuel distributor in NC notices water in a gasoline UST during a manual tank gauging
check. What action is most critical?
A) Increase the biocide additive concentration immediately
B) Remove water from the tank and investigate the source
C) Switch to a different brand of gasoline for the next delivery
D) Report the water to NC DEQ within 24 hours
Answer: B
Explanation: Water in gasoline can cause phase separation of ethanol blends, engine
damage, and corrosion. Removal and source investigation (e.g., leaky fill cap,
groundwater intrusion) are required by NC UST operational rules.
4. In North Carolina, what is the maximum allowable product delivery hose length for a
cargo tank truck used for fuel distribution, unless specifically permitted?
A) 50 ft
B) 75 ft
C) 100 ft
D) 150 ft
Answer: C
Explanation: NC adopts NFPA 30A and state fire codes limiting hose length to 100 feet
for cargo tank deliveries to reduce risk of damage, leaks, and traffic hazards.
,5. When performing a Class III liquid transfer (e.g., diesel fuel) at a bulk plant in NC,
bonding and grounding are required to prevent:
A) Electrostatic discharge ignition
B) Overfilling of the receiving tank
C) Mixing of incompatible products
D) Theft of fuel
Answer: A
Explanation: Bonding connects containers electrically, and grounding dissipates static
charge. Diesel (Class III) can still generate static; NC fire codes require
bonding/grounding for all flammable/combustible liquid transfers.
6. A NC fuel distributor must conduct monthly visual inspections of spill buckets at UST
sites. What is a key deficiency to look for?
A) The bucket color fading
B) Cracks, tears, or liquid in the bucket
C) The bucket brand name
D) The bucket being too deep
Answer: B
Explanation: Spill buckets (fill sumps) contain small spills during delivery. Cracks or
liquid indicate failure, which can allow product to reach soil/groundwater — a violation
of NC DEQ UST rules.
7. Which of the following is an acceptable monthly leak detection method for a UST in
NC, according to DEQ rules?
A) Visual inspection of the tank exterior once a month
, B) Automatic tank gauging (ATG) with 0.2 gal/hr precision
C) Smelling for gasoline vapors at the vent pipe
D) Waiting for a customer complaint about poor fuel quality
Answer: B
Explanation: ATG systems meeting 0.2 gal/hr monthly test precision are federally and
state-approved. Visual/vapor checks alone are insufficient for leak detection compliance.
8. A fueling facility in NC experiences a release of 30 gallons of diesel onto an unpaved
surface. What is the immediate reporting requirement?
A) No report needed under 50 gallons
B) Call NC DEQ within 24 hours
C) Report within 1 hour to NC Emergency Management
D) Report only if it reaches a storm drain
Answer: C
Explanation: NC G.S. 143-215.91 requires immediate (within 1 hour) reporting of any
petroleum release that could reach surface water or groundwater, or any release >25
gallons onto ground. 30 gallons triggers immediate report.
9. In NC, delivery drivers are required to remain within sight of the delivery hose during
fuel transfer. This rule primarily prevents:
A) Fuel theft by bypassing the meter
B) Overfills and unsupervised spills
C) Unauthorized personnel approaching the truck
D) Excessive pressure buildup in the tank
Distribution Practice Exam Questions
With Correct Solutions, Already Passed!!
1. A retail fuel dispenser in North Carolina must have an emergency shear valve installed
directly below the dispenser. What is the primary purpose of this valve?
A) To prevent unauthorized fuel dispensing after hours
B) To automatically shut off fuel flow if the dispenser is struck and knocked over
C) To filter particulates before fuel enters the vehicle
D) To measure the exact volume of fuel dispensed
Answer: B
Explanation: Emergency shear valves are designed to sever and seal the fuel line in the
event of a dispenser impact, preventing a major fuel spill and fire hazard. NC fire codes
mandate them for all retail dispensers.
2. Under NC regulations, which agency has primary enforcement authority for
underground storage tank (UST) rules at fuel distribution facilities?
A) NC Department of Environmental Quality (DEQ)
B) NC Department of Transportation (NCDOT)
C) NC Office of State Fire Marshal (OSFM)
D) NC Department of Agriculture
Answer: A
Explanation: The NC DEQ’s Underground Storage Tank Section enforces UST rules
,including leak detection, corrosion protection, and spill prevention, under authority
delegated by the EPA.
3. A fuel distributor in NC notices water in a gasoline UST during a manual tank gauging
check. What action is most critical?
A) Increase the biocide additive concentration immediately
B) Remove water from the tank and investigate the source
C) Switch to a different brand of gasoline for the next delivery
D) Report the water to NC DEQ within 24 hours
Answer: B
Explanation: Water in gasoline can cause phase separation of ethanol blends, engine
damage, and corrosion. Removal and source investigation (e.g., leaky fill cap,
groundwater intrusion) are required by NC UST operational rules.
4. In North Carolina, what is the maximum allowable product delivery hose length for a
cargo tank truck used for fuel distribution, unless specifically permitted?
A) 50 ft
B) 75 ft
C) 100 ft
D) 150 ft
Answer: C
Explanation: NC adopts NFPA 30A and state fire codes limiting hose length to 100 feet
for cargo tank deliveries to reduce risk of damage, leaks, and traffic hazards.
,5. When performing a Class III liquid transfer (e.g., diesel fuel) at a bulk plant in NC,
bonding and grounding are required to prevent:
A) Electrostatic discharge ignition
B) Overfilling of the receiving tank
C) Mixing of incompatible products
D) Theft of fuel
Answer: A
Explanation: Bonding connects containers electrically, and grounding dissipates static
charge. Diesel (Class III) can still generate static; NC fire codes require
bonding/grounding for all flammable/combustible liquid transfers.
6. A NC fuel distributor must conduct monthly visual inspections of spill buckets at UST
sites. What is a key deficiency to look for?
A) The bucket color fading
B) Cracks, tears, or liquid in the bucket
C) The bucket brand name
D) The bucket being too deep
Answer: B
Explanation: Spill buckets (fill sumps) contain small spills during delivery. Cracks or
liquid indicate failure, which can allow product to reach soil/groundwater — a violation
of NC DEQ UST rules.
7. Which of the following is an acceptable monthly leak detection method for a UST in
NC, according to DEQ rules?
A) Visual inspection of the tank exterior once a month
, B) Automatic tank gauging (ATG) with 0.2 gal/hr precision
C) Smelling for gasoline vapors at the vent pipe
D) Waiting for a customer complaint about poor fuel quality
Answer: B
Explanation: ATG systems meeting 0.2 gal/hr monthly test precision are federally and
state-approved. Visual/vapor checks alone are insufficient for leak detection compliance.
8. A fueling facility in NC experiences a release of 30 gallons of diesel onto an unpaved
surface. What is the immediate reporting requirement?
A) No report needed under 50 gallons
B) Call NC DEQ within 24 hours
C) Report within 1 hour to NC Emergency Management
D) Report only if it reaches a storm drain
Answer: C
Explanation: NC G.S. 143-215.91 requires immediate (within 1 hour) reporting of any
petroleum release that could reach surface water or groundwater, or any release >25
gallons onto ground. 30 gallons triggers immediate report.
9. In NC, delivery drivers are required to remain within sight of the delivery hose during
fuel transfer. This rule primarily prevents:
A) Fuel theft by bypassing the meter
B) Overfills and unsupervised spills
C) Unauthorized personnel approaching the truck
D) Excessive pressure buildup in the tank
