Question 1

Plastic piping materials generally have a self-ignition temperature exceeding

Accepted Answer

Plastic piping materials generally have a self-ignition temperature exceeding 650°F, which is higher than the other options listed.

Question 2

If permitted by local code, air admittance valves should be located a minimum of four inches above the crown weir of the fixture trap.

Accepted Answer

This is the recommended minimum height for air admittance valves to function effectively in most plumbing systems. However, it's important to check local code requirements as they may vary.

Question 3

Corrosive-resistant fume-exhaust systems normally involve which two types of piping?

Accepted Answer

Corrosive-resistant fume-exhaust systems usually involve the use of PVC and CPVC piping, as they are both highly resistant to corrosion from the fumes being exhausted.

Question 4

The lower the ignition temperature of a product, the safer it is.

Accepted Answer

The lower the ignition temperature of a product, the easier it is to ignite and therefore, the less safe it is. Higher ignition temperatures indicate that the product requires a higher temperature to ignite, making it safer.

Question 5

The best piping choice for the building owner is

Accepted Answer

The best piping choice for the building owner is the one with the lowest life-cycle cost for the installation. This takes into account not only the initial cost of the piping, but also the long-term maintenance, repair, and replacement costs. Choosing a piping material that requires less maintenance and has a longer lifespan can ultimately save the building owner money over time. Choosing a piping material based solely on initial cost or the profitability for the contractor may not necessarily result in the best long-term value for the building owner.

Question 6

Various plastic piping installations can be made that will have up to a three-hour fire rating.

Accepted Answer

Various plastic piping systems can be installed with fire-resistant coatings and insulation, allowing them to achieve up to a three-hour fire rating. However, it is important to note that not all plastic piping systems will have this level of fire resistance and it is important to consult with a professional to determine the appropriate system for a specific application.

Question 7

Which plastic piping type may be used as an under slab hot air duct?

Accepted Answer

The answer of Which plastic piping type may be used...

Question 8

The typical piping material used in ice rinks is ____.

Accepted Answer

PE (polyethylene) is the most common piping material used in ice rinks because it has good resistance to low temperatures and can withstand the pressure and stresses of the refrigeration system. CPVC, PVC, and PB are not as suitable for use in ice rinks due to their lower temperature resistance and/or lower pressure ratings.

Question 9

Plastic piping has many other non-plumbing uses.

Accepted Answer

Plastic piping can be used for various purposes such as irrigation, drainage systems, gas lines, and electrical conduits, among others.

Question 10

The most common plastic pipe used in geothermal ground source heating systems is

Accepted Answer

PE (polyethylene) is the best choice for geothermal ground source heating systems because it is durable, resistant to chemicals, and can withstand high temperatures and pressures. It also has a low thermal conductivity, which means it does not lose heat as easily as other pipes, making it more efficient for energy transfer in heating systems. CPVC, PVC, and ABS are not appropriate choices for geothermal ground source heating systems due to their limitations in temperature and pressure resistance, as well as their lower thermal conductivity.

Question 11

Plastic piping may be used in radiant heating floor installations.

Accepted Answer

Plastic piping, such as PEX, is commonly used in radiant heating floor installations because of its flexibility, durability, and resistance to corrosion.

Question 12

Since plastic pipe is fire-resistant, there is no need to caulk penetrations through a fire-rated wall.

Accepted Answer

This statement is false. While plastic pipe may have some fire-resistant properties, it is still important to caulk penetrations through a fire-rated wall to prevent the spread of fire and smoke.

Question 13

Because snow melt systems must be capable of heating concrete without the benefit of an insulated structure, how much higher is their heat output (BTUH) compared to indoor radiant heating systems?

Accepted Answer

Snow melt systems must be capable of heating concrete without the benefit of an insulated structure, which means they require a much higher heat output than indoor radiant heating systems. Snow melt systems typically have a heat output 3 to 6 times higher (measured in BTUH) than indoor radiant heating systems.

Question 14

One method of simplifying or reducing vent piping is by using

Accepted Answer

Air admittance valves are mechanical devices that allow air to enter the drainage system, preventing the need for additional vent piping. They are a cost-effective and space-saving solution for venting traps and can be used in certain situations where traditional venting methods are not feasible or practical. Drainage fixture units (B) and water supply fixture units (C) are not methods for simplifying or reducing vent piping. Hunter's Curve (D) is a graph used to analyze the flow of liquids in a piping system and is unrelated to venting.

Question 15

Which plastic piping type is used in radiant heating systems?

Accepted Answer

PEX (cross-linked polyethylene) is the most commonly used plastic piping type in radiant heating systems because it is flexible, durable, and resistant to corrosion and chemicals. It can also withstand high temperatures and pressures, making it ideal for use in heating systems. PE (polyethylene) is another plastic piping type that can be used, but it is not as commonly used in radiant heating systems as PEX. PP (polypropylene) and ABS (acrylonitrile butadiene styrene) are not typically used in radiant heating systems.

Question 16

The most important requirement for piping in permanent installations is that it

Accepted Answer

Adequate flow capacity ensures that the piping system will be able to meet all demands placed upon it, which is crucial for a permanent installation. Cost and ease of installation may be important factors, but they should not be prioritized over the system's functionality and longevity. Maintenance is also important but can be managed through proper design and monitoring.

Question 17

It is essential that the installation of any utility piping be done in such a way as to not reduce the fire rating of the structural element being penetrated.

Accepted Answer

This is true because utility piping that reduces the fire rating of a structural element could compromise the safety of the building and its occupants in case of a fire. Therefore, proper installation methods and materials that maintain the fire rating should be used.

Question 18

PEX has a lower ignition temperature than PVC.

Accepted Answer

PEX has a lower ignition temperature than PVC, making it a safer option for plumbing and heating systems.

Quiz 3: Special Applications of Plastic Pipe and Fittings