Alabama Recreational Vehicle Service
Technician Certification Exam Practice
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Guaranteed Pass (GRADED A+)
1. What is the primary function of the two-stage regulator on
a propane system?
A. To increase propane pressure for appliances
B. To reduce high tank pressure to a usable level for distribution
[CORRECT]
C. To filter impurities from the propane supply
D. To monitor propane levels in the tank
Rationale: The two-stage regulator reduces the high pressure
from the propane tank (up to 250 psi) first to an intermediate
level and then to a low pressure (11 inches water column) safe for
appliances. Increasing pressure would be dangerous; filtering is
done by the pigtail/filter; monitoring is the tank gauge.
2. A customer complains that their 12V overhead lights are
dim when the RV is not plugged into shore power but
brighten when plugged in. The battery is new. What is the
most likely cause?
A. A failed 120V circuit breaker.
B. A faulty converter that is not properly charging the battery or
,supplying 12V power. [CORRECT]
C. A blown 12V fuse for the lighting circuit.
D. A failed inverter.
Rationale: The converter charges the battery and supplies 12V DC
power when on shore power. Dim lights on battery alone suggest
the battery is undercharged. Brightening on shore power indicates
the converter is supplying 12V directly, but its charging circuit is
likely faulty.
3. In RV electrical troubleshooting, a tripped GFCI outlet is
most likely caused by:
A. Overloaded circuit from too many appliances
B. Moisture in the outlet or connected device [CORRECT]
C. A low battery voltage condition
D. A loose propane connection
Rationale: GFCIs trip when they detect current leaking to the
ground, which is often caused by moisture. An overloaded circuit
would typically trip a circuit breaker, not a GFCI.
4. Before performing any maintenance on an RV's electrical
system, what is the correct "Lockout/Tagout" procedure?
A. Turn off the main breaker inside the RV.
B. Unplug the shore power cord and tape the breaker in the off
position at the pedestal.
C. Disconnect shore power and the negative battery cable, then
tag the disconnects to prevent accidental reconnection.
[CORRECT]
D. Flip the battery disconnect switch inside the RV.
,Rationale: A comprehensive lockout/tagout requires isolating all
energy sources. Simply unplugging shore power leaves the
battery as a live source. Tagging warns others not to restore
power while work is in progress.
5. An RV technician smells propane upon entering a unit for
service. What is the immediate action?
A. Turn on the exhaust fans to clear the gas.
B. Light a match to find the source of the leak.
C. Evacuate the area, extinguish ignition sources, and shut off the
main propane tank valve. [CORRECT]
D. Call the supervisor from inside the RV.
Rationale: Propane is heavier than air and settles in low areas,
creating an explosion risk. The first priority is safety: evacuate
people, eliminate ignition sources, and stop the leak at the source.
6. Which RV system is MOST directly responsible for
distributing potable water to sinks and showers?
A. Electrical inverter system
B. Fresh water plumbing system [CORRECT]
C. Gray water system
D. Black tank system
Rationale: The fresh water system delivers clean, pressurized
potable water to fixtures such as sinks, showers, and toilets.
7. What is the primary safety purpose of RV chassis leveling
systems?
, A. Improve fuel economy during travel
B. Prevent tire wear during highway driving
C. Stabilize the RV to ensure safe occupancy and prevent
structural stress while parked [CORRECT]
D. Increase suspension height for off-road use
Rationale: Leveling systems ensure the RV remains stable, safe,
and structurally balanced during stationary use, preventing
movement hazards and internal system malfunctions.
8. When lifting an RV using hydraulic jacks or jack stands,
where should the lifting force be applied?
A. The frame rails or designated lift points specified by the
manufacturer. [CORRECT]
B. The axle tubes or differential housing.
C. The slideout rails.
D. The bumper or receiver hitch.
Rationale: RV frames are designed to support the weight. Lifting
on axles can damage suspension components. Lifting on bumpers
or slide rails can cause structural failure.
9. What is the correct pressure coming from the second stage
of a propane regulator?
A. 11 inches water column [CORRECT]
B. 14 inches water column
C. 5 PSI
D. 250 PSI
Technician Certification Exam Practice
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Guaranteed Pass (GRADED A+)
1. What is the primary function of the two-stage regulator on
a propane system?
A. To increase propane pressure for appliances
B. To reduce high tank pressure to a usable level for distribution
[CORRECT]
C. To filter impurities from the propane supply
D. To monitor propane levels in the tank
Rationale: The two-stage regulator reduces the high pressure
from the propane tank (up to 250 psi) first to an intermediate
level and then to a low pressure (11 inches water column) safe for
appliances. Increasing pressure would be dangerous; filtering is
done by the pigtail/filter; monitoring is the tank gauge.
2. A customer complains that their 12V overhead lights are
dim when the RV is not plugged into shore power but
brighten when plugged in. The battery is new. What is the
most likely cause?
A. A failed 120V circuit breaker.
B. A faulty converter that is not properly charging the battery or
,supplying 12V power. [CORRECT]
C. A blown 12V fuse for the lighting circuit.
D. A failed inverter.
Rationale: The converter charges the battery and supplies 12V DC
power when on shore power. Dim lights on battery alone suggest
the battery is undercharged. Brightening on shore power indicates
the converter is supplying 12V directly, but its charging circuit is
likely faulty.
3. In RV electrical troubleshooting, a tripped GFCI outlet is
most likely caused by:
A. Overloaded circuit from too many appliances
B. Moisture in the outlet or connected device [CORRECT]
C. A low battery voltage condition
D. A loose propane connection
Rationale: GFCIs trip when they detect current leaking to the
ground, which is often caused by moisture. An overloaded circuit
would typically trip a circuit breaker, not a GFCI.
4. Before performing any maintenance on an RV's electrical
system, what is the correct "Lockout/Tagout" procedure?
A. Turn off the main breaker inside the RV.
B. Unplug the shore power cord and tape the breaker in the off
position at the pedestal.
C. Disconnect shore power and the negative battery cable, then
tag the disconnects to prevent accidental reconnection.
[CORRECT]
D. Flip the battery disconnect switch inside the RV.
,Rationale: A comprehensive lockout/tagout requires isolating all
energy sources. Simply unplugging shore power leaves the
battery as a live source. Tagging warns others not to restore
power while work is in progress.
5. An RV technician smells propane upon entering a unit for
service. What is the immediate action?
A. Turn on the exhaust fans to clear the gas.
B. Light a match to find the source of the leak.
C. Evacuate the area, extinguish ignition sources, and shut off the
main propane tank valve. [CORRECT]
D. Call the supervisor from inside the RV.
Rationale: Propane is heavier than air and settles in low areas,
creating an explosion risk. The first priority is safety: evacuate
people, eliminate ignition sources, and stop the leak at the source.
6. Which RV system is MOST directly responsible for
distributing potable water to sinks and showers?
A. Electrical inverter system
B. Fresh water plumbing system [CORRECT]
C. Gray water system
D. Black tank system
Rationale: The fresh water system delivers clean, pressurized
potable water to fixtures such as sinks, showers, and toilets.
7. What is the primary safety purpose of RV chassis leveling
systems?
, A. Improve fuel economy during travel
B. Prevent tire wear during highway driving
C. Stabilize the RV to ensure safe occupancy and prevent
structural stress while parked [CORRECT]
D. Increase suspension height for off-road use
Rationale: Leveling systems ensure the RV remains stable, safe,
and structurally balanced during stationary use, preventing
movement hazards and internal system malfunctions.
8. When lifting an RV using hydraulic jacks or jack stands,
where should the lifting force be applied?
A. The frame rails or designated lift points specified by the
manufacturer. [CORRECT]
B. The axle tubes or differential housing.
C. The slideout rails.
D. The bumper or receiver hitch.
Rationale: RV frames are designed to support the weight. Lifting
on axles can damage suspension components. Lifting on bumpers
or slide rails can cause structural failure.
9. What is the correct pressure coming from the second stage
of a propane regulator?
A. 11 inches water column [CORRECT]
B. 14 inches water column
C. 5 PSI
D. 250 PSI
