RVTI Level 1 Certification Flashcards

Questions and Answers

What is propane when extracted?

Odorless and colorless

What is the device used on a propane tank to reduce pressure called?

Regulator

What is the boiling point for propane?

-44°F (-42°C)

What happens to propane when it is heated?

Expands Signup and view all the answers

What is it called when an element or compound changes from the liquid phase to a vapor?

Vaporization Signup and view all the answers

What is the most important factor to consider when working with propane systems?

Safety Signup and view all the answers

What can propane do when it comes into contact with skin?

Freeze skin Signup and view all the answers

Why is it important to wear gloves when using propane?

It can freeze the skin Signup and view all the answers

What should be worn when working with propane?

Appropriate gloves Signup and view all the answers

How should a service valve on a propane tank be closed?

With a hand Signup and view all the answers

In a shop environment, what should always be worn?

Safety glasses Signup and view all the answers

What should always be used when transporting or storing propane containers?

A POL plug or dust cap Signup and view all the answers

Which service valve is mandatory in the RV industry?

Type I OPD Signup and view all the answers

What is required to be part of ASME tanks that was not required before 1983?

OPD Signup and view all the answers

Where can the maximum allowable working pressure on an ASME tank be found?

Data plate Signup and view all the answers

What are the most common securing methods for cylinders?

Adjustable straps and T-bars Signup and view all the answers

Purging is necessary for which types of containers?

New and contaminated containers Signup and view all the answers

For purging, you must increase pressure by 15 psi and _____ is the total number of purgings required.

5 Signup and view all the answers

The tare weight of a cylinder is 19 pounds. The propane capacity is 20 pounds. To how many pounds should the cylinder be filled and to what level?

39 pounds; 80% level Signup and view all the answers

What pressure will the relief valve function at for compressed air and propane?

375 psi Signup and view all the answers

What can occur if a horizontal cylinder is not stored in its proper position?

Liquid propane can enter the vapor system Signup and view all the answers

Which of the following is NOT an appurtenance?

Mounting bracket Signup and view all the answers

What do black or green connector knobs on Type 1 OPD service valves indicate?

Flow rating Signup and view all the answers

ASME tanks are usually bolted to what?

The frame Signup and view all the answers

On double cylinder assemblies, what should be ensured?

The cylinder tray is attached to the unit's frame Signup and view all the answers

When purging, what should be avoided?

Applying a vacuum to containers that may have contained propane Signup and view all the answers

What can failure to purge when necessary cause?

Odor fade and false pressure Signup and view all the answers

Cylinders should be filled using what method?

The weight or volumetric method Signup and view all the answers

When releasing an air/gas mixture of propane, ensure a minimum of _____ feet in every direction between the container and source of ignition.

25 Signup and view all the answers

What does the lockup pressure test verify?

The regulator locks up when no propane is flowing Signup and view all the answers

What should be done immediately after conducting the operating pressure test?

Close up the gas cock Signup and view all the answers

Any regulator pressure over _____ inches WC will require the regulator to be replaced.

14 Signup and view all the answers

During a timed pressure drop test, if there is a pressure increase due to thermal expansion _, and if there is a pressure drop _

Repeat the test...locate and repair leak, and retest Signup and view all the answers

What should be documented for a timed pressure drop test with a test apparatus?

Inches of water Signup and view all the answers

When adjusting a system regulator, the operating test should show a working pressure of about 11 inches, and the lockup pressure should never exceed _____ inches.

14 Signup and view all the answers

The operating test is used to determine the pressure the regulator is giving when at least _____ of the appliance load is functioning.

50% Signup and view all the answers

A regulator must have a rated capacity equal to or greater than the total Btu/Hr input of what?

All appliances Signup and view all the answers

How long should the timed pressure drop test be conducted for?

At least 3 minutes Signup and view all the answers

What is the most important reason to document tests?

Protects against lawsuits Signup and view all the answers

What should be documented for a timed pressure drop test when doing the test at the range?

Manometer measurement and duration Signup and view all the answers

What does DWV mean?

Drain, waste, vent Signup and view all the answers

Why is ABS piping used in the RV industry?

It resists impact in cold temperature Signup and view all the answers

What does an RV water distribution system need?

A means of providing pressure Signup and view all the answers

What might a customer experience if they complain of lukewarm water at one or more hot faucets?

A bypass valve might be partially open or failed Signup and view all the answers

Sealants used when building city water test kits should be for what type of water?

Potable water Signup and view all the answers

What sealant is most appropriate to use when assembling a city water test kit?

Thread Signup and view all the answers

Which step is part of a freshwater system inspection?

Conduct a water system leak test Signup and view all the answers

When inspecting a freshwater system, what must be ensured?

It functions properly on pump and city water hookup Signup and view all the answers

How long do demand system and air pressure tests last?

10 minutes Signup and view all the answers

NFPA 1192 requires potable water tanks to be ___, _, and ___ before use.

Sanitized, flushed, and drained Signup and view all the answers

What is the main purpose of opening the faucets until the water runs clear?

Let antifreeze out of the system Signup and view all the answers

When de-winterizing, what is the purpose of opening the faucet in the coach?

Let air into the system Signup and view all the answers

Choose from _ grades of antifreeze that are suitable for the _ when winterizing.

2; temperature Signup and view all the answers

During winterization of an entire RV water system, all water is replaced with what?

Antifreeze to prevent freezing Signup and view all the answers

What does the liquid waste holding tank contain, and what does the body waste holding tank contain?

Grey water; solid waste water Signup and view all the answers

What can an anti-siphon trap device be substituted for?

Secondary vent Signup and view all the answers

When an RV is equipped with a liquid waste holding system, what test should be performed for 15 minutes during a fixture flood test?

Static water Signup and view all the answers

When conducting PDI of a waste water system, what should be done before a flood test?

Conduct a flow test Signup and view all the answers

What is the purpose of pouring another cup of antifreeze down the drain at various sinks when winterizing the waste system?

To check if the p-traps have antifreeze Signup and view all the answers

After flushing and cleaning holding tanks during winterization, what should be done?

Close termination valves Signup and view all the answers

Sewage wastewater holding tanks can receive discharge from how many RV fixtures?

Any number of RV fixtures Signup and view all the answers

Which test requires the entire drainage system to be filled until water appears at the bottom of the lowest fixture?

Fixture flood test Signup and view all the answers

What is checked last during a flow test?

Leaks Signup and view all the answers

Which statement is true regarding electrons in the outer orbits?

They are attracted less powerfully to the nucleus Signup and view all the answers

What is a function of insulators?

Confines electron flow Signup and view all the answers

What is true about the ends of permanent magnets?

They are more concentrated than the middles Signup and view all the answers

If a length of wire carrying a current is bent to form a loop, where do the lines of force leave and enter?

Leave at one side of the loop and enter on the opposite side Signup and view all the answers

What is the symbol for current flow?

I Signup and view all the answers

What happens when two points of unequal potential or voltage are connected?

Current flows Signup and view all the answers

What can be achieved by joining RV batteries in series?

Keep the same amperage and add voltage Signup and view all the answers

To properly measure current with a VOM, how must the VOM be connected?

In series with the source Signup and view all the answers

Convert 125 milliamps to amperes.

0.125 Signup and view all the answers

What is the correct setting on a VOM for measuring DC Amperage?

mA or DCA Signup and view all the answers

When using a voltmeter to test for voltage in a simple circuit, how should the meter be connected?

In parallel with the load Signup and view all the answers

Convert 400 millivolts to volts.

0.4 Signup and view all the answers

What is the basic unit of resistance?

Ohm Signup and view all the answers

At constant voltage, double the resistance is equal to _____ the current.

1/2 Signup and view all the answers

In the final calculations of Ohm's Law, current is always expressed in what unit?

Amperes Signup and view all the answers

When an accident occurs, who must it be reported to?

The supervisor Signup and view all the answers

Which of these is associated with system grounding?

The power supply cord is connected to the power pedestal Signup and view all the answers

What is the intentional grounding of all metal noncurrent carrying parts of the electrical system called?

Equipment grounding Signup and view all the answers

An electrical circuit is any combination of a _ and _ connected together to permit electrons to travel around in a continuous stream.

Conductor; electricity source Signup and view all the answers

Components, devices, and equipment in the RV that utilize low-voltage direct current are often referred to as what?

DC Loads Signup and view all the answers

Receptacles located in which of these places must have GFCI protection?

The bathroom Signup and view all the answers

Batteries connected _____ provide a higher current capacity.

In parallel Signup and view all the answers

Electrons are _, and protons are _.

negative; positive Signup and view all the answers

What is the function of a conductor?

Permits electrons to move through it Signup and view all the answers

Current is measured in what unit?

Amps Signup and view all the answers

Electromotive force is equal to what?

Voltage Signup and view all the answers

What can a parallel RV battery bank allow a technician to do?

Increase the current and keep the voltage the same Signup and view all the answers

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?

3 ohms Signup and view all the answers

In reference to current, what is the minimum threshold for irreparable damage to body tissues?

Over a few amps Signup and view all the answers

In DC currents, what is the direction of current flow?

Constant Signup and view all the answers

Wire size is expressed in terms of what?

Gauge Signup and view all the answers

What are the steps for measuring AC current on an analog or digital meter?

Place the meter in a safe position, select AC current mode, and then immediately switch to the highest current range. Signup and view all the answers

When measuring current on an analog or digital meter, how should the meter capacity relate to the expected amperage?

It should be higher Signup and view all the answers

When testing for an electrical short during the hot skin test, where should one voltmeter probe be placed?

On an earth ground surface Signup and view all the answers

If the skin of the unit is not hot, what will the voltmeter read?

0 Signup and view all the answers

When conducting an AC voltage test, an acceptable reading will be at or near what voltage?

120 VAC Signup and view all the answers

When conducting an AC voltage test, how should the test probes be placed?

Into 2 slotted openings of a receptacle Signup and view all the answers

Study Notes

Propane Properties and Safety

Propane is odorless and colorless.
The pressure-reducing device for propane tanks is a regulator.
Propane has a boiling point of -44°F (-42°C) and expands when heated.
Vaporization is the process of converting a liquid into vapor.
Safety is the primary consideration when working with propane systems.
Propane is flammable and can cause skin freezing.

Personal Protective Equipment

Use gloves to protect skin from freeze burns when handling propane.
Always wear safety glasses in a workshop environment.
Appropriate gloves are essential when working with propane tanks.

Propane Tank Operations

Close service valves on propane tanks by hand.
When transporting or storing propane, use a POL plug or dust cap.
Type I OPD service valves are required in the RV industry.
OPD was mandated for ASME tanks after 1983.

Propane Tank Specifications

The maximum working pressure for ASME tanks is indicated on the data plate.
Cylinders are typically secured with adjustable straps or T-bars.
New and contaminated containers require purging.
The purging process involves increasing pressure by 15 psi and requires five purgings.

Cylinder Filling Protocols

Tare weight of a cylinder is 19 pounds; fill to 39 pounds, at 80% capacity.
Relief valves function at 375 psi; improper cylinder positioning can result in liquid propane entering the vapor system.

Appurtenances and Standards

A mounting bracket is not considered an appurtenance.
Black or green connector knobs indicate flow rating on Type 1 OPD service valves.
ASME tanks are typically bolted to the frame of RVs.

Maintenance and Testing Procedures

Proper installation requires the cylinder tray to be secured to the frame.
Avoid creating a vacuum when purging containers that previously contained propane.
Documenting procedures, such as the timed pressure drop test, protects against lawsuits.

Electrical Fundamentals

DWV stands for drain, waste, and vent in plumbing.
ABS piping is preferred in RVs for its impact resistance in cold weather.
DC Loads refer to devices in the RV that use low-voltage direct current.

Water System Inspection

Freshwater systems require pressure; a leak test is part of an inspection.
Opening faucets during de-winterizing lets antifreeze out and air in.
Potable water tanks must be sanitized, flushed, and drained per NFPA 1192 standards.

Waste Management Systems

Grey water is stored in liquid waste holding tanks, while body waste goes into solid waste holding tanks.
Static water tests are performed on liquid waste systems during fixture tests.
Antifreeze should be poured down drains to check if P-traps are sealed.

Electric Current and Resistance

Current is measured in amps; Ohm’s Law indicates that resistance impacts current flow inversely.
Battery connections in parallel increase current capacity, while series connections increase voltage.

Meter Usage and Testing

Always connect a voltmeter in parallel when measuring voltage; for current, series connections are necessary.
Acceptable AC voltage readings should be around 120VAC.
Measure current expecting meter capacity to exceed anticipated amperage.
Place one voltmeter probe on an earth ground and the other on bare metal during hot skin tests.

Important Testing protocols

Conduct timed pressure drop tests for a minimum of 3 minutes, measuring in inches of water.
If testing shows pressure drop, locate and repair leaks before re-testing.
Use the highest current range when measuring AC current.

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Description

Prepare for the RVTI Level 1 certification with these flashcards focused on propane. From its properties to the devices used, this quiz will help solidify your understanding of propane-related concepts. Challenge yourself and ensure you're ready for your certification exam.