How Well Do You Know Your Truck Camper? – #1

Drawing of a truck camper

Truck Camper Quiz #1

  1. What percentage of a propane tank capacity is reserved to prevent over-pressurizing from expansion?
  2. True or False – LP stored in cylinders on your truck camper is in a gaseous state?
  3. Is your LP pressure regulator one stage or two-stage?
  4. When who and how is the LP regulator adjusted?
  5. If a high or low-pressure propane hose needs a new fitting, you should ___.
  6. A high-pressure flexible connector or pigtail of a propane line is limited to a maximum length of ___.
  7. On an LP cylinder collar is marked “TW” and a number.  What does this represent?
  8. What is the life expectancy of a typical LP cylinder?
  9. Name some of the mandatory safety features in the LP system?
  10. True or False – Safety devices have an unlimited life span and do not need to be replaced?
  11. Some truck campers have a four-stage electrical converter to recharge batteries. What are the common names for the four stages?
  12. What is the benefit of a four-stage charger?
  13. In an electrical circuit, as resistance increases in each circuit, the amperage will ____.
  14. What is the wattage of a 120-V AC heating element at 1200 Watts?
  15. If you should remove copper material or strands when stripping the insulation from a wire, you should ___.
  16. When using a voltmeter to measure current, always start with which scale?
  17. A lamp circuit has a 15-amp fuse installed. What is the maximum draw to that circuit?
  18. What is the common way to connect two 12-volt batteries in a truck camper to obtain 12-volts?
  19. Connecting batteries in series will what to the voltage?
  20. A purpose of a hydrometer is to measure ___.
  21. Which receptacles must be GFCI protected?
  22. When multiple batteries are connected in parallel, the available current equals ___.
  23. As the gauge of copper wire increases, its diameter __________ in size
  24. A solenoid valve on the propane system is a normally closed valve; what does this mean?
  25. Electrical current supplied by commercial power lines at the campground power pedestal is known as ___.
  26. What must be used when passing all electrical conductors through bulkheads and/or partitions?

How well did you do?

  1. 20% – DOT cylinders used in truck campers are required to have an overfill-prevention device (OPD).  OPD-equipped cylinders have a triangular-shaped handwheel on the service valve.
  2. False – Propane stored in cylinders is in a liquid state.
  3. Truck-campers are required to have a two-stage regulator. The first stage drops the LP vapor pressure to approximately 10 to 15 psi, and the second stage further reduces operating pressure to 11 inches of the water column.
  4. The pressure regulator output is adjustable and should be checked periodically by a qualified technician using a manometer device.
  5. Replace the entire hose assembly.
  6. A high-pressure flexible connector is limited to 5 feet.
  7. The “TW,” also known as the tare weight, is followed by the empty weight of the cylinder in pounds.
  8. Cylinders expire 10 years after the date of manufacture but can be recertified for five-year periods. The date of manufacture is engraved in the cylinder collar. Additional information is also stamped on the collar, such as the empty cylinder tare weight (TW).
  9. The mandatory safety features are the cylinder overfill-prevention valve, thermal shutoffs, excess-flow valves, step-down regulators, and carbon-monoxide and propane detector.
  10. Detectors do not have unlimited life spans and must be removed and replaced by the date code on the back of each unit.  The sensitive detecting elements can be contaminated by impurities in the air, such as cooking fumes, hair spray, aerosol cleaners, dust particles, etc.
  11. A four-stage converter constantly monitors battery voltage and battery usage, then selects one of the following four operation modes: boost, normal, storage, or equalization.
  12. A four-stage charger has been shown to increase battery life by as much as two to three times. It is designed to eliminate battery over- and undercharging frequently associated with less-sophisticated battery chargers.
  13. As the resistance increase, the amperage will decrease.
  14. 10 amps
  15. You should cut the end off and start over
  16. At the largest scale
  17. 15 amps
  18. The batteries are wired in parallel – the negative post of the first battery is wired to the negative post of the second battery, which is connected to the negative wire for the truck camper – in the meantime, the positive post of the first battery is wired to the positive post of the second battery which is connected to the positive wire for the truck camper.
  19. Increase the voltage – 2 six-volt batteries can provide 12-volts
  20. Measuring the specific gravity of the electrolyte in a battery
  21. All exterior, kitchen, and bathroom outlets
  22. The sum of all the batteries amp hour rating
  23. Decreases in size – 20-gauge wire is smaller in diameter than a 12- gauge wire and is intended to carry less amperage for the same voltage.
  24. 12 -volt is needed to keep the valve open
  25. Alternating current
  26. Clamps or rubber grommets to prevent chaffing


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