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RVTI Level 1 Certification
Propane, as extracted, - ANSWER - Is odorless and colorless The device used on a propane tank to reduce pressure is called a - ANSWER - Regulator The boiling point for propane is - ANSWER --44F (-42C) A property of propane is that, when heated, it - ANSWER - Expands When an element or compound changes from the liquid phase to a vapor, it is called - ANSWER - Vaporization When working with propane systems, the most important factor to consider is - ANSWER - Safety
Propane is flammable, can explode with pressure, and is able to
- ANSWER - Freeze skin It is important to wear gloves when using propane because it can - ANSWER - Freeze the skin When working with propane, it is important to wear - ANSWER
- Appropriate gloves To close a service valve on a propane tank, it is best to tighten the valve with - ANSWER - A hand In a shop environment, always wear - ANSWER - Safety glasses When transporting or storing containers, always use - ANSWER - A POL plug or dust cap Which service valve is mandatory in the RV industry? - ANSWER
- Type I OPD
The relief valve will function if the pressure of the compressed air plus the pressure of the propane meets or exceeds the relief valve setting of - ANSWER - 375 psi What can occur if a horizontal cylinder is not stored in its proper position? - ANSWER - Liquid propane can enter the vapor system Which of the following is NOT an appurtenance? - ANSWER - Mounting bracket Black or green connector knobs on Type 1 OPD service valves indicate - ANSWER - Flow rating ASME tanks are usually bolted to - ANSWER - The frame On double cylinder assemblies, make sure - ANSWER - The cylinder tray is attached to the unit's frame When purging, avoid applying a vacuum to containers that may have contained - ANSWER - Propane
Failure to purge when necessary can cause - ANSWER - Odor fade and false pressure Cylinders should be filled using - ANSWER - The weight or volumetric method When releasing an air/gas mixture of propane, ensure a minimum of _____ feet in every direction between the container and source of ignition. - ANSWER - 25 The lockup pressure test verifies the pressure at which - ANSWER - The regulator locks up when no propane is flowing Immediately after conducting the operating pressure test - ANSWER - Close up the gas cock Any regulator pressure over _____ inches WC will require the regulator to be replaced. - ANSWER - 14 During a timed pressure drop test, no pressure drop should be detected. If there is a pressure increase due to thermal
What is the most important reason to document tests? - ANSWER - Protects against lawsuits What should be documented for a timed pressure drop test when doing the test at the range? - ANSWER - Manometer measurement and duration hat does DWV mean? - ANSWER - Drain, waste, vent Why is ABS piping used in the RV industry? - ANSWER - It resists impact in cold temperature An RV water distribution system needs - ANSWER - A means of providing pressure If a customer complains of lukewarm water at one or more hot faucets - ANSWER - A bypass valve might be partially open or failed Sealants used when building city water test kits should - ANSWER - Be for potable water
What sealant is most appropriate to use when assembling a city water test kit? - ANSWER - Thread Which step is part of a freshwater system inspection? - ANSWER
- Conduct a water system leak test When inspecting a freshwater system, make sure it functions properly on - ANSWER - Pump and city water hookup How long do demand system and air pressure tests last? - ANSWER - 10 minutes NFPA 1192 requires potable water tanks to be _____, _____, and _____ before use. - ANSWER - Sanitized, flushed, and drained What is the main purpose of opening the faucets until the water runs clear? - ANSWER - Let antifreeze out of the system
When conducting PDI of a waste water system, conduct a flow test _____ a flood test. - ANSWER - Before When winterizing the waste system, what is the purpose of pouring another cup of antifreeze down the drain at the kitchen, lavatory sink, and show/tub drains? - ANSWER - To check if the p-traps have antifreeze After flushing and cleaning holding tanks during winterization, drain each tank and - ANSWER - Close termination valves Sewage wastewater holding tanks can receive discharge from - ANSWER - Any number of RV fixtures Which test requires the entire drainage system, including holding tanks, to be filled until water appears at the bottom of the lowest fixture on each system? - ANSWER - Fixture flood test What is checked last during a flow test? - ANSWER - Leaks
Which statement is true? - ANSWER - Electrons in the outer orbits are attracted less powerfully to the nucleus Which of these is a function of insulators? - ANSWER - Confines electron flow What is true about the ends of permanent magnets? - ANSWER
- They are more concentrated than the middles If a length of wire carrying a current is bent to form a loop, the lines of force around the conductor will leave at one side of the loop and enter - ANSWER - On the opposite side What is the symbol for current flow? - ANSWER - I When two points of unequal potential or voltage are connected
- ANSWER - Current flows Joining RV batteries in series allows the technician to - ANSWER
- Keep the same amperage and add voltage
When an accident occurs, it must be reported to - ANSWER - The supervisor Which of these is associated with system grounding? - ANSWER
- The power supply cord is connected to the power pedestal The intentional grounding of all metal noncurrent carrying parts of the electrical system is called - ANSWER - Equipment grounding An electrical circuit is any combination of a _____ and _____connected together to permit electrons to travel around in a continuous stream. - ANSWER - Conductor; electricity source Components, devices, and equipment in the RV that utilize low- voltage direct current are often referred to as - ANSWER - DC Loads Receptacles located in which of these places must have GFCI protection? - ANSWER - The bathroom
Batteries connected _____ provide a higher current capacity. - ANSWER - In parallel Electrons are _____, and protons are _____. - ANSWER - negative, positive What is the function of a conductor? - ANSWER - Permits electrons to move through it Current is measured in - ANSWER - Amps Electromotive force is equal to - ANSWER - Voltage A parallel RV battery bank allows the technician to - ANSWER - Increase the current and keep the voltage the same An unknown resistor is connected across a battery. The voltage across it is 12 volts and the current flowing is 4 amperes. What is the resistance of the resistor? - ANSWER - 3 ohms
If the skin of the unit is not hot, the voltmeter will read - ANSWER - 0 When conducting an AC voltage test, an acceptable reading will be at or near _____ VAC or equal to the voltage output of the source. - ANSWER - 120 When conducting an AC voltage test, place the test probes into _____ slotted openings of a receptacle. - ANSWER - 2 A GFCI has receptacles that are protected at this place if the receptacle is properly wired. - ANSWER - Downstream Inverters are rated in - ANSWER - Watts Identify an advantage of alternators. - ANSWER - Delivers higher current at a lower rpm than generators RV batteries contain _____ acid. - ANSWER - Sulfuric
What is true of smoke alarms for RVs? - ANSWER - They need to be listed for RV use and installed Identify the necessary electrical safety tests. - ANSWER - 120 vac, hot skin, ac voltage, and GFCI When pressing the button on a tester during a GFCI test, what must happen? - ANSWER - The circuit breaker must trip Why do RVs use converters? - ANSWER - Convert AC to DC What is a safety precaution to take when working with batteries? - ANSWER - Wear splash-proof googles What is true of carbon monoxide alarms for RVs? - ANSWER - They must be installed regardless of fuel type What is the function of the cold refrigerant? - ANSWER - Extracts heat and moisture
The piece of equipment that runs between the pickup and truck camper is called the - ANSWER - 12V DC umbilical cord What is the result of a thermocouple that is not performing very well? - ANSWER - Propane flow will be prevented A technician must verify which weight capacity of a truck to use a truck camper? - ANSWER - Suspension capacity What is a cooktop with an oven called? - ANSWER - Range Verify which of the following weights regarding the adequacy of the pickup? - ANSWER - GVWR The data plate for a range is located - ANSWER - In the burner box When performing PDI on expandable rooms, slide-out operation can be hindered by - ANSWER - Location of furniture
The temperature setting of 300° F is referenced when inspecting - ANSWER - Ovens When performing PDI on slide outs, verify alignments in open and closed positions - ANSWER - Front to rear, top to bottom Two main types of RV microwaves include standard and - ANSWER - Convection Primary and secondary are two major types of - ANSWER - Sealant When performing PDI on microwaves, document the make, model, and - ANSWER - Serial number When checking seals that are already in an RV, a technician must - ANSWER - Observe that they are visible How long should tap water be microwaved when performing PDI? - ANSWER - 1 minute
