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RV REGISTERED TECHNICIAN SAMPLE QUESTIONS AND ANSWERS
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RV REGISTERED TECHNICIAN SAMPLEQUESTIONS AND ANSWERS 2024-2025
What percentage of the propane tank's capacity is allocated to prevent overpressure
due to expansion? - ANSWER 20%
What test is required every time a system is opened? - ANSWER: Time Pressure
Drop
A service shut-off valve should only be closed with ANSWER Hands.
A Type I (CGA 791) valve should— Never close with a POL plastic plug.
Gloves must be worn when filling a gas cylinder.
When purging a 20# propane cylinder, what is the shortest distance to an ignition
source? - ANSWER: 25 feet
An open outage valve is used to show the maximum liquid level.
ANSWER: Backup wrenches are used to prevent damage to propane connections.
When filling a propane canister, 25 feet is the minimum distance from an ignition
source.
When carrying a DOT propane cylinder, apply a dust cap.
- 44 degrees Fahrenheit is the boiling point of propane.
,What is the weight of five gallons of liquid propane? - ANSWER: 21 pounds
How many British Thermal Units are there in a pound of liquid propane at 60
degrees Fahrenheit? - ANSWER: 21,548
What is the highest percentage of propane vapour in the atmosphere that can ignite?
- ANSWER: 9.6%
ANSWER: The molecule that gives propane its odor is ethel mercaptan.
The temperature of a propane container impacts the passage of vapor from the
container.
What is the maximum lock-up regulator pressure? - ANSWER: 14" water column
What lowers propane container pressure to 10 PSI? - ANSWER First step of a
regulator.
The volume of propane liquid increases by 1.5% for every 10 degrees it is warmed.
What is the estimated BTU content of a 20-pound propane cylinder? - Answer:
345,000
How many times heavier is propane gas than air? - ANSWER 1.5 times heavier
than air.
When the pressure in a container is near zero as a result of cooling from
us—ANSWER has overtaken the rate of evaporation.
,Propane gas emitted into the atmosphere is invisible.
Pressure within a propane canister fluctuates with the temperature.
Who regulates propane cylinders? - ANSWER The department of transportation
(DOT)
Who regulates propane tanks? - ANSWER ASME
What should you do before filling a propane cylinder? - The date of manufacturing
Propane containers must be securely fastened to the RV so that they do not become
dislodged when a force equal to _________ times their weight is applied in any
direction. - ANSWER 8.
The data plate on an ASME tank does not specify the tare weight.
What is another name for a J-tube. - ANSWER: vapor remove tube.
What information does not appear on the protective collar of a DOT cylinder? -
ANSWER Propane capacity in pounds.
Which component is not directly linked to a DOT cylinder's service valve? -
ANSWER Excess flow control valve
What gauge number represents the greatest diameter copper wire? - Answer: 00
What component prevents moisture from accumulating on the regulator
diaphragm? - ANSWER Relief Mechanism
, How many amps will a 12 volt circuit draw with 5 ohms resistance? ANSWER 2.4
What is the resistance of a 12 VDC, 6 A circuit? - ANSWER: 2 Ohms.
How many amps will a 120v, 100w bulb require? - ANSWER 0.83
What is the resistance of a 120-volt, 1200 watt electric heater? - ANSWER: 12
Ohms.
When a battery bank is connected positive to positive and negative to negative,
what kind of circuit results? - Answer: Parallel
A short circuit is a full circuit with no resistance.
Is it necessary to de-energize a circuit before measuring? - ANSWER resistance.
A fusible link is designed to protect a DC circuit from - ANSWER excessive
amperage.
A full circuit contains of: ANSWER source, conductor, and load.
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