RVTI Level 1 Certification Exam
Evaluation – 2026/2027 Academic Year
Comprehensive Practice Examination for
Recreational Vehicle Technical Institute
(RVTI) Certification
Domain 1: Electrical Systems – Questions 1–35
1. What is the standard nominal voltage of an RV's DC (direct current)
battery system?
A. 6 volts
B. 12 volts
C. 24 volts
D. 48 volts
Rationale: RV DC systems operate on a 12-volt nominal battery system. This
standard voltage powers lights, water pumps, fans, control boards, and other
DC loads. Fully charged batteries read approximately 12.6–12.7 volts at rest.
2. Which type of RV battery uses absorbed glass mat (AGM) technology
and requires NO maintenance?
A. Flooded lead-acid battery
B. Sealed AGM (absorbed glass mat) battery
C. Nickel-cadmium battery
D. Wet cell marine battery
Rationale: AGM batteries use fiberglass mats saturated with electrolyte,
making them spill-proof, maintenance-free (no watering required), and
,resistant to vibration. They are increasingly popular in RV applications due to
their sealed construction and ability to mount in any orientation.
3. When testing a 12V flooded lead-acid battery with a hydrometer, a
specific gravity reading of 1.265 in all cells indicates the battery is:
A. Completely discharged
B. Approximately 50% charged
C. Fully charged
D. Sulfated and defective
Rationale: A specific gravity of 1.265 (at 80°F) in all cells indicates a fully
charged 12V flooded lead-acid battery. Readings should be consistent across
all cells (within 0.030 points). A variation greater than 0.030 between cells
indicates a weak or damaged cell. Battery voltage of 12.6–12.7V also indicates
full charge.
4. What is the primary function of a converter/charger in an RV
electrical system?
A. Convert 12V DC to 120V AC for household appliances
B. Convert 120V AC shore power or generator power to 12V DC for
battery charging and DC loads
C. Store excess solar energy for nighttime use
D. Regulate LP-gas pressure to appliances
Rationale: The converter/charger converts 120V AC power (from shore
power or generator) to 12V DC power to run DC loads and charge the battery
bank. Modern multi-stage converters use bulk, absorption, and float charging
stages to properly charge batteries without overcharging.
5. What is the purpose of an inverter in an RV electrical system?
A. Convert 120V AC to 12V DC
B. Convert 12V DC battery power to 120V AC power for running
household appliances without shore power
,C. Charge the batteries from solar panels
D. Regulate generator voltage output
Rationale: An inverter converts DC battery power to AC power, allowing
appliances to run when shore power is unavailable. Pure sine wave inverters
are preferred for sensitive electronics. Modified sine wave inverters are
suitable for simpler loads.
6. A 12V RV battery bank is rated at 200 amp-hours (Ah). Approximately
how many amp-hours are available for use without damaging the
batteries (50% depth of discharge for flooded lead-acid)?
A. 200 Ah
B. 100 Ah
C. 50 Ah
D. 150 Ah
Rationale: Flooded lead-acid batteries should not be discharged below 50%
depth of discharge (DOD) to avoid damage and extend battery life. Therefore,
a 200 Ah battery bank provides approximately 100 Ah of usable capacity. AGM
batteries can have up to 80% DOD, and lithium batteries up to 100% DOD.
7. Which wire color is standard for 12V DC ground connections in an RV?
A. Red
B. Black
C. White
D. Green
Rationale: In 12V DC RV systems, the standard color code is: red or black for
positive (+) and white for negative (-) or ground. In 120V AC systems, black is
hot, white is neutral, and green or bare is ground.
8. When connecting two 12V batteries in parallel, the resulting voltage
and capacity are:
, A. 24 volts, same amp-hour capacity
B. 12 volts, double the amp-hour capacity
C. 12 volts, same amp-hour capacity
D. 24 volts, double the amp-hour capacity
Rationale: Parallel connection: positive to positive and negative to negative.
Voltage stays at 12V, amp-hour capacity adds. Series connection: positive to
negative. Voltage adds (24V), amp-hour capacity stays the same.
9. What is the typical function of an automatic transfer switch (ATS) in
an RV?
A. Transfer power between batteries
B. Automatically switch between shore power and generator power
C. Transfer power between 12V and 120V systems
D. Disconnect power in case of overload
Rationale: The ATS prioritizes shore power over generator power. When
shore power is connected, the ATS routes it to the distribution panel. When
shore power is removed and the generator starts, the ATS switches to
generator power automatically.
10. What is the maximum recommended voltage drop for a 12V DC
circuit in an RV?
A. 1%
B. 3%
C. 5%
D. 10%
Rationale: The industry standard for 12V DC circuits is a maximum voltage
drop of 3% for branch circuits. A 5% drop is allowed for feeder circuits.
Excessive voltage drop causes dim lights, slow motors, and poor appliance
performance.
Evaluation – 2026/2027 Academic Year
Comprehensive Practice Examination for
Recreational Vehicle Technical Institute
(RVTI) Certification
Domain 1: Electrical Systems – Questions 1–35
1. What is the standard nominal voltage of an RV's DC (direct current)
battery system?
A. 6 volts
B. 12 volts
C. 24 volts
D. 48 volts
Rationale: RV DC systems operate on a 12-volt nominal battery system. This
standard voltage powers lights, water pumps, fans, control boards, and other
DC loads. Fully charged batteries read approximately 12.6–12.7 volts at rest.
2. Which type of RV battery uses absorbed glass mat (AGM) technology
and requires NO maintenance?
A. Flooded lead-acid battery
B. Sealed AGM (absorbed glass mat) battery
C. Nickel-cadmium battery
D. Wet cell marine battery
Rationale: AGM batteries use fiberglass mats saturated with electrolyte,
making them spill-proof, maintenance-free (no watering required), and
,resistant to vibration. They are increasingly popular in RV applications due to
their sealed construction and ability to mount in any orientation.
3. When testing a 12V flooded lead-acid battery with a hydrometer, a
specific gravity reading of 1.265 in all cells indicates the battery is:
A. Completely discharged
B. Approximately 50% charged
C. Fully charged
D. Sulfated and defective
Rationale: A specific gravity of 1.265 (at 80°F) in all cells indicates a fully
charged 12V flooded lead-acid battery. Readings should be consistent across
all cells (within 0.030 points). A variation greater than 0.030 between cells
indicates a weak or damaged cell. Battery voltage of 12.6–12.7V also indicates
full charge.
4. What is the primary function of a converter/charger in an RV
electrical system?
A. Convert 12V DC to 120V AC for household appliances
B. Convert 120V AC shore power or generator power to 12V DC for
battery charging and DC loads
C. Store excess solar energy for nighttime use
D. Regulate LP-gas pressure to appliances
Rationale: The converter/charger converts 120V AC power (from shore
power or generator) to 12V DC power to run DC loads and charge the battery
bank. Modern multi-stage converters use bulk, absorption, and float charging
stages to properly charge batteries without overcharging.
5. What is the purpose of an inverter in an RV electrical system?
A. Convert 120V AC to 12V DC
B. Convert 12V DC battery power to 120V AC power for running
household appliances without shore power
,C. Charge the batteries from solar panels
D. Regulate generator voltage output
Rationale: An inverter converts DC battery power to AC power, allowing
appliances to run when shore power is unavailable. Pure sine wave inverters
are preferred for sensitive electronics. Modified sine wave inverters are
suitable for simpler loads.
6. A 12V RV battery bank is rated at 200 amp-hours (Ah). Approximately
how many amp-hours are available for use without damaging the
batteries (50% depth of discharge for flooded lead-acid)?
A. 200 Ah
B. 100 Ah
C. 50 Ah
D. 150 Ah
Rationale: Flooded lead-acid batteries should not be discharged below 50%
depth of discharge (DOD) to avoid damage and extend battery life. Therefore,
a 200 Ah battery bank provides approximately 100 Ah of usable capacity. AGM
batteries can have up to 80% DOD, and lithium batteries up to 100% DOD.
7. Which wire color is standard for 12V DC ground connections in an RV?
A. Red
B. Black
C. White
D. Green
Rationale: In 12V DC RV systems, the standard color code is: red or black for
positive (+) and white for negative (-) or ground. In 120V AC systems, black is
hot, white is neutral, and green or bare is ground.
8. When connecting two 12V batteries in parallel, the resulting voltage
and capacity are:
, A. 24 volts, same amp-hour capacity
B. 12 volts, double the amp-hour capacity
C. 12 volts, same amp-hour capacity
D. 24 volts, double the amp-hour capacity
Rationale: Parallel connection: positive to positive and negative to negative.
Voltage stays at 12V, amp-hour capacity adds. Series connection: positive to
negative. Voltage adds (24V), amp-hour capacity stays the same.
9. What is the typical function of an automatic transfer switch (ATS) in
an RV?
A. Transfer power between batteries
B. Automatically switch between shore power and generator power
C. Transfer power between 12V and 120V systems
D. Disconnect power in case of overload
Rationale: The ATS prioritizes shore power over generator power. When
shore power is connected, the ATS routes it to the distribution panel. When
shore power is removed and the generator starts, the ATS switches to
generator power automatically.
10. What is the maximum recommended voltage drop for a 12V DC
circuit in an RV?
A. 1%
B. 3%
C. 5%
D. 10%
Rationale: The industry standard for 12V DC circuits is a maximum voltage
drop of 3% for branch circuits. A 5% drop is allowed for feeder circuits.
Excessive voltage drop causes dim lights, slow motors, and poor appliance
performance.
