Week 1

What colour is type K

green

What colour is Type L

blue

What colour is type M

red

What colour is type DWV?

yellow

What does DWV mean

Drainage, waste and vent applications

What does ACR mean

Air conditioning and refrigeration

type K copper tube has the _______ wall of the five types of copper tube

Heaviest wall thickness

A K-19.6 sprinkler will discharge at what percentage of a K-5.6 sprinkler?

350%

What is the approximate RPM of a High Volume Low Speed (HVLS) fan?

60 rpm

Which of the following is not a classification of rolled paper?

Ordinaryweight

What is the size of schedule 40 pipe required to support 8-inch schedule 10 pipe in the center of an 11.5-foot span?

3 ½"

What is the minimum wall thickness required for 10-inch steel pipe joined by roll grooving?

0.188"

Which type of copper tubing has the largest inside diameter?

Type M

What is the minimum bend radius for 3-inch schedule 10 pipe?

36"

What is the maximum permitted length of a single extension fitting installed with a sprinkler?

2"

When subdividing dry pipe systems with check valves, what size hole is required in the check valve?

1/8"

When stored nitrogen is used as the air supply for a dry system, how long must the supply last?

6 months

What standard governs non-cylinder type reinforced concrete pressure pipe for underground installations?

AWWA C302

What standard must all pipe threads be cut to?

ASME B1.20.1

What is the nominal orifice size of a K-14 sprinkler?

3/4"

What is the maximum height for low piled storage?

12'

What is the minimum pressure rating for underground fittings?

150 psi

Which of the following is not considered a light hazard occupancy?

Clothing Store

The threaded swivel connections of an FDC must meet the requirements of which NFPA standard?

NFPA 1963

What is the minimum lining thickness for 8" cement lined ductile iron pipe used for underground installations?

1/16"

How many bolting rods are required for 10" pipe when installing restraint through mechanical joints?

3

What is the required flow rate for adequate flushing of 6" underground pipe?

880 gpm

What must be done when work is stopped for the day during a new installation of underground piping?

All openings must be capped.

What do the letters CPVC stand for?

Chlorinated Polyvinyl Chloride.

What is the maximum distance between hangers for 1" CPVC pipe?

6'

What are the concerns with care and handling of solvent cement?

Solvent cement is highly flammable, emits toxic vapors, and can cause skin or eye irritation. It must be used in well-ventilated areas away from heat sources, and containers should be kept tightly closed when not in use.

What materials are not compatible with CPVC pipe?

Petrochemical products, such as cabling and caulking

What reference documents are used for the installation of CPVC pipe?

Manufacture literature nfpa 13

What is the difference between set time and cure time?

Set time is the initial period required for the joint to handle basic stress, while cure time is the total time required for the solvent to evaporate and the joint to reach its full rated pressure strength.

When are you required to install an expansion loop with CPVC pipe?

Expansion loops are required when the pipe run is long enough that thermal expansion and contraction could cause stress on the joints or supports, typically determined by the temperature differential and pipe length.

What type of antifreeze solution must be used with CPVC pipe?

Only factory-premixed glycerin-based antifreeze solutions specifically listed for use with CPVC pipe may be used;

Identify three types of copper pipe used in sprinkler systems.

Type K, Type L, and Type M copper tubing.

What is the maximum distance between hangers for 1" copper pipe?

The maximum hanger spacing for 1" copper pipe is generally 8 feet, as specified by NFPA 13.

What is the main difference between soldering and brazing?

Soldering is performed at temperatures of 350-600°F using filler metals with lower melting points, while brazing is performed at temperatures above 1100-1500f and provides higher joint strength.

What are the requirements for using soldered joints with copper pipe in a sprinkler system according to NFPA 13?

Soldered joints are only permitted for wet pipe systems

can also be used in Exposed light hazard, ordinary hazard and concealed spaces

Identify two advantages of using copper pipe in sprinkler systems.

Copper pipe offers excellent corrosion resistance and is lightweight

What type of fitting is required when joining copper pipe to steel pipe?

A dielectric union or fitting is required to prevent galvanic corrosion caused by the contact of dissimilar metals.

What type of pipe can be used with press fittings?

Copper, Stainless, Carbon, Plastic

Identify the type of pipe that can be used with press fittings

Stainless 304,316 Sch 10

Carbon steel sch 5(discontinued) 10-40

state the available sizes of press fittings

1/2 - 4"

What makes a press fitting water tight?

An O-ring gasket makes the press fitting water-tight

List two advantages of press fittings.

They allow for rapid installation without the need for open flames (no hot work permits) and work with a variety of pipes

List two disadvantages of press fittings.

Dry fit or missing a press is possible, and Press connections are permanent

What are the four main types of copper pipe and their respective color labels?

Type K (green), Type L (blue), Type M (red), and DWV (yellow).

Which type of copper pipe has the thickest wall and is bendable?

Type K (green label).

Which type of copper pipe is the cheapest and has the best flow characteristics due to its large I.D.?

Type M (red label).

What is the primary difference between drawn and annealed copper?

Drawn copper is hard/rigid (12-20' lengths), while annealed copper is soft (40-100' rolls).

What are the four common methods of joining copper pipe?

Solder, brazing, flared/compression, and grooved.

Why is flux used when soldering copper?

Flux dissolves oxides, prevents re-oxidation, and increases capillary action to allow solder to enter the joint.

What is the standard solder composition most commonly used for copper?

95/5 solder, consisting of 95% tin and 5% antimony.

What temperature range is required for soldering copper?

350-600 degrees Fahrenheit.

What temperature range is required for brazing copper?

1100-1500 degrees Fahrenheit.

Why should you avoid brazing cast copper fittings?

Cast fittings tend to crack due to the high heat associated with the brazing process.

Are flux and filler rods handled differently in brazing compared to soldering?

Yes; brazing filler rods are typically pre-coated with flux, so no additional flux is needed.

What are the approved filler materials for brazing copper according to NFPA?

B cup 3 and B cup 4.

What components make up a compression joint?

A compression nut and a ferrule (or olive).

When is a flared joint preferred over a standard compression joint?

When a more reliable connection is required.

For what size pipe is roll grooving typically used?

Larger pipe, specifically 2 inches and larger.

What are the primary advantages of using copper piping?

Great flow characteristics, lightweight, ability to use smaller pipe sizes, and corrosion resistance.

What are the primary disadvantages of using copper piping?

High cost, potential reaction to other materials, requirement for open flames, and the need for extra hangers.

What is the primary function of DWV copper pipe?

Drain, waste, and vent systems in residential plumbing.

What type of flux should be used when soldering sprinkler systems?

Only mildly aggressive flux, as highly aggressive flux can damage the sprinkler seat.

What is the main purpose of the flux flowing out of the joint cavity during soldering?

It clears the path to allow the solder to enter the joint.

What is a press fitting in the context of sprinkler systems?

A method of joining pipe using a specially designed metal fitting with a rubber O-ring gasket that requires a tool to compress the fitting onto the pipe.

What is the NFPA 13 requirement for using press fittings?

NFPA 13 approves other methods of joining if they are listed for such use and installed according to their listing limitations and installation instructions.

What are the standard preparation steps for installing a press fitting?

The pipe must be cut square, deburred, reamed, and the fitting engagement marked on the pipe.

What is the final step in the press fitting installation process?

After inserting the pipe into the fitting and verifying proper engagement, a press tool is used to compress the fitting onto the pipe.

What are the primary advantages of using press fittings over traditional methods?

They work with various pipe types, eliminate the need for flames (copper), avoid time-consuming threading (stainless), and allow for plain-end carbon steel connections.

What are the main disadvantages of press fitting systems?

Inconsistent listings across manufacturers, risk of dry-fit or missed presses, permanent connections, tool clearance requirements, and maintenance needs.

Why is it important to mark fitting engagement on the pipe?

To ensure the pipe is fully inserted into the fitting before the pressing process begins.

What is a major limitation regarding the maintenance of press connections?

Press connections are permanent and cannot be modified once installed.

What is the primary reason Victaulic pressfit systems with Schedule 5 pipe may not meet NFPA 13 hanger requirements?

The pipe is not capable of supporting an additional 250 lbs as required by the standard.

What is the pressure rating for most standard press fitting systems listed in the notes?

175 psi.

Which Viega product is specifically limited to NFPA 13D systems only?

Viega Pure Flow (Pex).

What is the maintenance requirement for the Vic-press tool?

Annual maintenance by the manufacturer or every 10,000 presses.

What is the maintenance requirement for the Ridgid RP340 press tool?

Maintenance by the manufacturer every 42,000 presses.

How does the number of presses per charge change with pipe size for the Ridgid RP340?

The number of presses per charge begins at 400 for 1/2 inch pipe and decreases as the fitting sizes get larger.

What is a common field issue regarding press tools and space?

Press tools require specific clearance to operate, making them difficult to use in tight spaces.

What must be done to the rubber O-ring before inserting the pipe into the fitting?

Check for its presence and lubricate it.

Which Viega product is compatible with Schedule 10-40 black iron pipe?

Viega Megapress.

What is a significant operational challenge when using press tools on different pipe sizes?

The press tool requires changing of jaws for different size pipes.

What is the weight difference between the Vic-press tool and the Ridgid RP340?

The Vic-press tool weighs 21 lbs, while the Ridgid RP340 weighs 8.3 lbs.

What is the fitting size range for Viega Pro-press on copper pipe?

1/2 inch to 4 inches.

Why is battery management a concern for press tool operators?

The number of presses per charge is limited, and larger pipe sizes require more frequent battery changes.

What does the acronym CPVC stand for?

Chlorinated Polyvinyl Chloride

How does CPVC compare to PB in terms of temperature resistance?

CPVC can resist higher water temperatures compared to PB.

How does the ductility of CPVC compare to PVC?

CPVC is more ductile than PVC.

What is a major environmental vulnerability of CPVC pipe?

It does not contain UV stabilizers and is susceptible to degradation and Environmental Stress Cracking when exposed to UV light.

How can you visually identify UV damage in CPVC pipe?

The pipe begins to turn a lighter color or fades; faded pipe should be discarded.

Why is CPVC incompatible with petrochemical products like cabling or caulking?

Petrochemical products contain Amines, which off-gas and eat the walls of CPVC pipe.

What is the estimated lifespan of CPVC pipe?

50 years or more.

What are three advantages of using CPVC pipe?

Better hydraulics, flexibility in tight spaces, and limited tools required for installation.

What is a common disadvantage regarding the installation environment of CPVC?

In most circumstances, the pipe cannot be run exposed.

Can CPVC fittings be reused?

No, fittings cannot be reused.

Why are vertical restraints required for CPVC sprinkler systems?

To brace the pipe against vertical lift caused by the reactive force when a sprinkler activates.