# Punkd12 Problem S-1

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PLUMBING PROBLEMS

• 1.

### A horizontal drain that is sized to provide free movement of air above the flow line of the drain is called a __

• A.

Solvent waste and vent system

• B.

Combination waste and vent system

• C.

Continuous waste system

• D.

Durham waste and vent system

B. Combination waste and vent system
Explanation
A combination waste and vent system is a horizontal drain that is designed to allow for the free movement of air above the flow line of the drain. This system is used to remove waste and provide ventilation to prevent the build-up of harmful gases. It is called a combination system because it serves both waste removal and venting purposes.

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• 2.

### The length along the centerline of the pipe and fittings is the ___

• A.

Diameter length

• B.

Circumferential length

• C.

Developed length

• D.

Diagonal length

C. Developed length
Explanation
The developed length refers to the total length of a pipe or fitting when it is laid out in a straight line. It takes into account any bends, curves, or changes in direction along the centerline of the pipe or fitting. This measurement is important for determining the amount of material needed for installation, as well as for calculating pressure drop and flow rates in the system.

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• 3.

### A device integrated within an ai accumalator vessel that is designed to discharge a predetermined quantity of water to fixtures for flushing purposes is a (an) __  *

• A.

Surge tank

• B.

Day tank

• C.

Expansion tank

• D.

Flushometer tank

D. Flushometer tank
Explanation
A flushometer tank is a device integrated within an ai accumulator vessel that is designed to discharge a predetermined quantity of water to fixtures for flushing purposes. This tank is specifically designed for flushometer systems, which are commonly used in commercial buildings. The tank holds a certain amount of water and releases it quickly and forcefully to create a powerful flush.

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• 4.

### The combination of fittings that may be used to make an offset and is considered a vertical pipe are:

• A.

1-45 degree and 1-45 degree

• B.

1-60 degree and 1-45 degree

• C.

1-90 degree and 1-45 degree

• D.

2-90 degree and 1-45 degree

A. 1-45 degree and 1-45 degree
Explanation
To create an offset in a vertical pipe, two fittings are required: one 45-degree fitting and one 45-degree fitting. The combination of these two fittings allows for a change in direction while maintaining a vertical orientation. Using a 60-degree fitting or a 90-degree fitting would not create a vertical offset. Similarly, using two 90-degree fittings would result in a 180-degree change in direction, which is not considered a vertical offset. Therefore, the correct combination of fittings for a vertical pipe offset is 1-45 degree and 1-45 degree.

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• 5.

### Water that is safe for people to drink is referred to by this code as ___ *

• A.

Industrial water

• B.

Potable water

• C.

Soft water

• D.

Hard water

B. Potable water
Explanation
The code refers to water that is safe for people to drink as "potable water".

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• 6.

### By code definition, a stack is always __

• A.

Straight

• B.

Vertical

• C.

Horizontal

• D.

Exposed

B. Vertical
Explanation
A stack is always vertical because it follows the Last-In-First-Out (LIFO) principle. In a vertical stack, the elements are added and removed from the same end, which is the top of the stack. This means that the most recently added element is always at the top and the first element added is at the bottom. By maintaining this vertical arrangement, the stack can efficiently perform operations such as push (adding an element) and pop (removing an element) in constant time complexity.

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• 7.

### A pipe that makes an angle of not more than 45 degree with the vertical is considered ___

• A.

Vertical

• B.

Horizontal

• C.

Crooked pipe

• D.

Diagonal pipe

A. Vertical
Explanation
A pipe that makes an angle of not more than 45 degrees with the vertical is considered vertical because it is still primarily aligned with the vertical direction. The term "vertical" refers to something that is aligned or positioned in a straight up and down manner, and a pipe that deviates from this vertical alignment by not more than 45 degrees still falls within the vertical category.

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• 8.

### The vertical depth of a trap seal is measured from __

• A.

The outlet of the trap to the bottom of the trap

• B.

The inlet of the trap to the outlet of the trap

• C.

The crown weir to the top of the dip of the trap

• D.

The inlet of the trap to the bottom of the trap

C. The crown weir to the top of the dip of the trap
Explanation
The vertical depth of a trap seal is measured from the crown weir to the top of the dip of the trap. The crown weir is the highest point of the trap, and the dip is the lowest point. Measuring from the crown weir to the top of the dip ensures that the entire depth of the trap is taken into account, providing an accurate measurement of the trap seal. Measuring from other points, such as the outlet or the inlet, may not capture the full depth of the trap.

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• 9.

### A mixing valve that senses outlet temperature and compensates for fluctuations in incoming hot or cold water temperature is a ___ *

• A.

Combination thermostatic/pressure-balancing valve

• B.

Thermostatic (temperature control) valve

• C.

Pressure-balancing valve

• D.

None of the above

B. Thermostatic (temperature control) valve
Explanation
A mixing valve that senses outlet temperature and compensates for fluctuations in incoming hot or cold water temperature is referred to as a thermostatic (temperature control) valve. This type of valve is designed to maintain a consistent water temperature by automatically adjusting the mixture of hot and cold water based on the desired outlet temperature. It ensures that the water temperature remains constant even if there are changes in the incoming hot or cold water supply.

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• 10.

### The restroom facilities in a private day care center are classified as public use.

• A.

True

• B.

False

• C.

Maybe

A. True
Explanation
Restroom facilities in a private day care center are classified as public use because they are accessible and available for use by the general public, including the children and staff of the day care center. These facilities are not exclusive to a specific group or restricted to private use only.

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• 11.

### The discharge from clinical sinks and conveyed to the building drain is defined as a waste pipe.

• A.

True

• B.

False

• C.

Maybe

B. False
Explanation
The statement is false because the discharge from clinical sinks is not defined as a waste pipe. A waste pipe refers to a pipe that carries waste or sewage materials away from a building. The discharge from clinical sinks is typically connected to a sanitary drainage system, which is separate from the waste pipe system.

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• 12.

### A combination building sewer is (a)___

• A.

Combination of all sewer and drainage piping from inside and outside of the building

• B.

Building sewer that conveys industrial waste and domestic sewage

• C.

Building drains that convey waste and storm water

• D.

Building sewer that conveys both sewage and storm water

D. Building sewer that conveys both sewage and storm water
Explanation
A combination building sewer is a type of sewer that is responsible for carrying both sewage and stormwater. This means that it is designed to handle the waste from inside the building as well as any rainwater or runoff from outside the building. This type of sewer system is commonly used in urban areas where there is a need to efficiently manage both types of waste.

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• 13.

### PEX is the definition for ___

• A.

Polyethylene

• B.

Polybutylene X

• C.

• D.

None of the above

Explanation
PEX is the abbreviation for cross-linked polyethylene. Cross-linked polyethylene is a type of plastic that is commonly used in plumbing and heating systems. It is known for its flexibility, durability, and resistance to high temperatures and chemicals. PEX pipes are often used as an alternative to traditional copper or PVC pipes due to their ease of installation and lower cost.

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• 14.

### The lowest portion of the inside of a horizontal pipe is called the ___

• A.

Invert mass

• B.

Invert

• C.

Flat vent

• D.

Bottom

B. Invert
Explanation
The lowest portion of the inside of a horizontal pipe is called the invert. This term refers to the bottom surface or level of the pipe where the flow of liquid or material is at its lowest point. The invert is important in determining the slope and elevation of the pipe, as well as for calculating the hydraulic gradient.

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• 15.

### A device and system of piping that maintains a water seal in a remote trap is called a trap primer.

• A.

True

• B.

False

• C.

Maybe

A. True
Explanation
A trap primer is a device and system of piping that is used to maintain a water seal in a remote trap. This is necessary because the water seal in a trap prevents sewer gases from entering a building. The trap primer ensures that this water seal is constantly replenished, usually by diverting a small amount of water from a nearby source such as a water supply line. Therefore, the statement "A device and system of piping that maintains a water seal in a remote trap is called a trap primer" is true.

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• 16.

### Static pressure is pressure existing without any flow.

• A.

True

• B.

False

• C.

Maybe

A. True
Explanation
Static pressure refers to the pressure exerted by a fluid when it is at rest. It is the pressure that exists in a fluid, such as air or water, without any movement or flow. This pressure is uniform in all directions and does not change with time. Therefore, it can be stated that static pressure is pressure existing without any flow.

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• 17.

### An unconfined space is a room or space having a volume equal to at least ___ of the aggregate input rating of all the fuel-burning appliances in the space. *

• A.

10 cu. ft per Btu/hr

• B.

25 cu. ft per 1,000 Btu/hr

• C.

50 cu. ft per 1,000 Btu/hr

• D.

100 cu. ft per Btu/hr

C. 50 cu. ft per 1,000 Btu/hr
Explanation
An unconfined space is a room or space that is not enclosed or restricted in any way. The correct answer, 50 cu. ft per 1,000 Btu/hr, means that for every 1,000 Btu/hr of fuel-burning appliances in the space, there should be at least 50 cubic feet of volume. This ensures that there is enough air circulation and ventilation to prevent the buildup of potentially harmful gases or fumes.

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• 18.

### A permanently installed mechanical device, other than an ejector, for removing sewage or liquid waste from a sump is called a sewage pump.

• A.

True

• B.

False

• C.

Maybe

A. True
Explanation
A sewage pump is indeed a permanently installed mechanical device used for removing sewage or liquid waste from a sump. It is designed to pump the waste from one location to another, such as from a basement or lower level to a sewer line or septic tank. This helps prevent the accumulation of sewage and ensures proper disposal. Therefore, the statement "A permanently installed mechanical device, other than an ejector, for removing sewage or liquid waste from a sump is called a sewage pump" is true.

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• 19.

### A standard that is an extensive compilation of provision covering broad subject matter is the dedfinition for ___

• A.

Listed

• B.

Legal document

• C.

Code

• D.

Standards

C. Code
Explanation
A code is a standard that is an extensive compilation of provisions covering broad subject matter. It is a comprehensive set of rules or regulations that govern a particular field or industry. Codes are often used to ensure uniformity, safety, and compliance within a specific area of practice. They provide guidance and standards for professionals to follow in order to maintain quality and consistency in their work.

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• 20.

### The principal artery of the venting system to which branches may be connected is called the  ___

• A.

Branch vent

• B.

Vertical vent

• C.

Vent

• D.

Main vent

D. Main vent
Explanation
The main vent is the principal artery of the venting system to which branches may be connected. It serves as the primary pathway for the release of air and gases from the plumbing system. The main vent ensures proper ventilation and prevents the buildup of pressure or vacuum within the system, allowing for efficient drainage and operation of the plumbing fixtures.

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• 21.

### A joint obtained by joining of metal parts with metallic mixtures of alloys that melt at a temperature up to and including 840 degree F is a ___ *

• A.

Brazed joint

• B.

Soldered joint

• C.

Metallic joint

• D.

Flared joint

B. Soldered joint
Explanation
A joint obtained by joining metal parts with metallic mixtures of alloys that melt at a temperature up to and including 840 degrees F is called a soldered joint.

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• 22.

### The organization, office, or individual responsible for enforcing the requirements of a code or standard is the ___                *

• A.

Authority Having Jurisdiction

• B.

Plumbing inspector or department

• C.

Building department

• D.

A. Authority Having Jurisdiction
Explanation
The term "Authority Having Jurisdiction" refers to the organization, office, or individual who is responsible for enforcing the requirements of a code or standard. This authority has the power to interpret and enforce regulations, issue permits, conduct inspections, and ensure compliance with the code or standard. They play a crucial role in maintaining safety and ensuring that buildings and systems meet the required standards.

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• 23.

### That portion of a drainage system that does not drain by gravity into the building sewer is known as a__

• A.

Storm sewer

• B.

Building subdrain

• C.

Sewer ejector

• D.

Building supply

B. Building subdrain
Explanation
A building subdrain refers to the part of a drainage system that does not rely on gravity to drain into the building sewer. It is typically used to collect and remove excess water or sewage from below ground level, such as from basements or underground structures. This helps prevent flooding and water damage in these areas.

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• 24.

### A pipe inside a building that conveys storm water from the roof to a strom drain is called a(an) ___

• A.

Conductor

• B.

Building storm drain

• C.

• D.

A. Conductor
Explanation
A pipe inside a building that conveys storm water from the roof to a storm drain is called a conductor. This term is commonly used in the construction and plumbing industry to refer to the pipe that carries rainwater or stormwater away from the building and directs it towards a storm drain system. The conductor pipe helps to prevent water accumulation on the roof and potential damage to the building's structure.

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• 25.

### An outlet on a boiler to permit emptying or discharging of sediment is called a(an) ___

• A.

Boiler blowoff

• B.

Aspirator

• C.

Relief valve

• D.

Atmospheric check valve

A. Boiler blowoff
Explanation
An outlet on a boiler designed to permit the emptying or discharging of sediment is referred to as a "boiler blowoff." This component is essential for the maintenance and operation of a boiler system, allowing for the removal of sediment and other impurities that can accumulate at the bottom of the boiler. Regular blowdown procedures help maintain the boiler's efficiency and prevent damage to the system.

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• 26.

### A pressure surge-absorbing device operating through the compressibilty of air is called a(an) ___     *

• A.

Flushometer valve

• B.

Hammer arrestor

• C.

Air chamber

• D.

Backflow preventor

C. Air chamber
Explanation
An air chamber is a pressure surge-absorbing device that operates through the compressibility of air. When water flow is suddenly stopped, the momentum of the moving water creates a pressure surge in the pipes. The air chamber acts as a cushion, absorbing the pressure surge by compressing the air inside it. This helps to prevent damage to the pipes and fixtures caused by the sudden increase in pressure.

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• 27.

### A device installed in a drainage system to prevent reverse flow is a ___

• A.

Sewage ejector

• B.

Check valve

• C.

Backflow preventor

• D.

Backflow valve

D. Backflow valve
Explanation
A device installed in a drainage system to prevent reverse flow is a backflow valve. This valve allows the flow of wastewater or sewage in one direction but prevents it from flowing back in the opposite direction. It is designed to protect the drainage system from contamination and prevent backflow of potentially harmful substances into the system.

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• 28.

### Any pressure less than that exerted by atmospheric is a(an) __

• A.

Vacuum

• B.

Negative pressure

• C.

Atmospheric pressure

• D.

Positive pressure

A. Vacuum
Explanation
Any pressure less than that exerted by atmospheric pressure is considered a vacuum. A vacuum is a space devoid of matter, meaning there is no air or gas present. In this context, it means that the pressure is lower than the pressure exerted by the atmosphere, resulting in a vacuum. Negative pressure is not a commonly used term and atmospheric pressure refers to the pressure exerted by the atmosphere itself. Positive pressure, on the other hand, refers to a pressure that is higher than atmospheric pressure.

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• 29.

### A document, the main text of which contains only mandatory provisions using the word "shall" to indicate requirements, is best described as a __             *

• A.

Code

• B.

Standard

• C.

Law

• D.

Legal document

B. Standard
Explanation
A document that contains only mandatory provisions using the word "shall" to indicate requirements is best described as a standard. Standards are documents that establish specifications, guidelines, or criteria for products, services, or processes, and they often use the term "shall" to indicate mandatory requirements that must be followed.

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• 30.

### Unsanitary and insanitary share the same meaning

• A.

True

• B.

False

• C.

Maybe

A. True
Explanation
Unsanitary and insanitary have the same meaning because both words describe conditions or environments that are not clean or hygienic. They are often used interchangeably to refer to places or situations that are dirty, unhygienic, or pose a risk to health.

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• 31.

### When a backflow prevention device does not bear a critical level marking, the part of the device that shall constitute the critical level is the ___     *

• A.

Top

• B.

Center

• C.

Bottom

• D.

Outlet invert

C. Bottom
Explanation
When a backflow prevention device does not bear a critical level marking, the part of the device that shall constitute the critical level is the bottom. This means that the bottom of the device is the point at which the backflow prevention measures are designed to activate and prevent the reverse flow of water or other substances. It is important for the device to be properly marked with the critical level to ensure that it functions effectively and prevents contamination of the water supply.

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• 32.

### Disposal of sewage, or other liquid waste, shall be by means of __

• A.

The drainage system of the building or premises

• B.

sewage retaining tanks

• C.

Subsurface leaching pits

• D.

Chemical toilets

A. The drainage system of the building or premises
Explanation
The correct answer is the drainage system of the building or premises. This means that sewage or liquid waste should be disposed of through the existing drainage system in the building or premises. This is the most common and efficient method of sewage disposal, as it allows for proper treatment and removal of waste through a network of pipes and drains. Sewage retaining tanks, subsurface leaching pits, and chemical toilets are alternative methods of disposal, but they may not be as effective or practical in all situations.

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• 33.

### A drinking fountain installed outside shall be connected to an approved drainage system.

• A.

True

• B.

False

• C.

Maybe

A. True
Explanation
The correct answer is true. A drinking fountain installed outside should be connected to an approved drainage system to ensure that any excess water or waste is properly disposed of. This helps to maintain cleanliness and prevent any potential health hazards or water damage. Without a drainage system, water from the fountain could accumulate and create a breeding ground for bacteria or cause flooding in the surrounding area. Therefore, it is important to connect the drinking fountain to an approved drainage system.

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• 34.

### A connection to the public sewer, or private sewage disposal system, is required for ___

• A.

Buildings with plumbing fixtures

• B.

Buildings with emergency drain systems

• C.

Buildings with storm drain systems

• D.

Buildings with or without plumbing fixtures

A. Buildings with plumbing fixtures
Explanation
A connection to the public sewer, or private sewage disposal system, is required for buildings with plumbing fixtures. Plumbing fixtures such as toilets, sinks, and showers produce wastewater that needs to be properly disposed of through a sewage system. Buildings without plumbing fixtures may not produce wastewater and therefore may not require a connection to a sewage disposal system.

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• 35.

### Roofs, inner courts, vents shafts, light wells, or similar areas having rainwater drains shall discharge to a ___

• A.

Outside of the building or to the gutter

• B.

Sanitary sewage system

• C.

Private sewage disposal system

• D.

Sump with pump discharge into the house drain

A. Outside of the building or to the gutter
Explanation
Rainwater drains from roofs, inner courts, vents shafts, light wells, or similar areas should be discharged outside of the building or to the gutter. This is to ensure that rainwater is effectively directed away from the building to prevent water damage and flooding. Discharging the rainwater to the sanitary sewage system or private sewage disposal system would be inappropriate as these systems are designed for the disposal of wastewater and not rainwater. Similarly, using a sump with pump discharge into the house drain would not be suitable for rainwater drainage.

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• 36.

### Burred ends of all pipe and tubing shall be ___.

• A.

Painted to reduce friction

• B.

Reamed to the full bore of the pipe of tube

• C.

Avoided by use of special cutting tools

• D.

Confined to exposed and readily accesible locations

B. Reamed to the full bore of the pipe of tube
Explanation
The correct answer is "reamed to the full bore of the pipe or tube." This means that the burred ends of all pipe and tubing should be smoothed out and widened to match the diameter of the pipe or tube. This helps to ensure proper flow and prevent any obstructions or restrictions in the system.

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• 37.

### No plumbing system, drainage system, building sewer, private sewage disposal system, or parts thereof, shall be located in ___

• A.

Any lot other than the lot that is the site of the building served by such facilities

• B.

The walls, floors, or underground in any building

• C.

Pipe access spaces where accessible for repair

• D.

Any garage, or equipment or locker room

A. Any lot other than the lot that is the site of the building served by such facilities
Explanation
The correct answer states that no plumbing system, drainage system, building sewer, private sewage disposal system, or parts thereof should be located in any lot other than the lot that is the site of the building served by such facilities. This means that the plumbing and sewage systems should only be installed on the same lot as the building they are serving.

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• 38.

### Piping, fixtures, or equipment that are installed so that they interfere with normal operation and use of windows or doors shall be ___

• A.

Identified for restricted use

• B.

Protected from damage

• C.

Approved if acceptable by the owner

• D.

Relocated to avoid interference

D. Relocated to avoid interference
Explanation
Piping, fixtures, or equipment that are installed so that they interfere with normal operation and use of windows or doors should be relocated to avoid interference. This means that if any of these items are obstructing the proper functioning or accessibility of windows or doors, they should be moved to a different location to prevent any hindrance or inconvenience. This ensures that the windows and doors can be used effectively without any obstructions.

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• 39.

### All design, construction, and workmanship shall be in conformity with ___

• A.

Practices of the contractor

• B.

Accepted engineering practices

• C.

Standard shop procedures

• D.

Job plan and specifications

B. Accepted engineering practices
Explanation
The correct answer is "accepted engineering practices". This means that all design, construction, and workmanship should be done according to the commonly accepted standards and practices in the field of engineering. These practices ensure that the work is done in a safe and efficient manner, meeting the industry standards and regulations.

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• 40.

### When supporting horizontal piping 5-inches in diameter with hangers, a __ inch diameter rod shall be used.

• A.

1

• B.

1/2

• C.

5/8

• D.

3/8

B. 1/2
Explanation
When supporting horizontal piping with hangers, a larger diameter rod should be used to ensure proper support. In this case, a 1/2 inch diameter rod would be appropriate for supporting the 5-inch diameter piping. This larger diameter rod will provide sufficient strength and stability to hold the piping securely in place.

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• 41.

### The building drain from the front building may be extended to the rear building when both buildings are located ___.

• A.

On an ineterior (when driveway cannot be used)

• B.

300 ft from the public sewer

• C.

200 ft from the public sewer

• D.

On a corner lot

A. On an ineterior (when driveway cannot be used)
Explanation
When both buildings are located on an interior (when driveway cannot be used), the building drain from the front building may be extended to the rear building. This suggests that when there is no access to a driveway between the buildings, the building drain can be extended from the front building to the rear building.

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• 42.

### All trenches deeper than the footing of any building or structure and paralleling the same shall be at least ___.

• A.

5-foot intervals

• B.

Every other story

• C.

Each floor not to exceed 15 ft

• D.

10-foot intervals

C. Each floor not to exceed 15 ft
Explanation
The correct answer is each floor not to exceed 15 ft. This means that any trenches deeper than the footing of a building or structure and running parallel to it should be spaced at intervals of 15 ft or less. This requirement ensures that the stability of the building or structure is maintained and that the trenches do not pose a risk of collapse or damage.

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• 43.

### Threaded pipe (I.P.S.) 3/4 inch, except for gas piping, installed horizontally shall be supported at appproximately ___.

• A.

5-foot intervals

• B.

10-foot intervals

• C.

12-foot intervals

• D.

15-foot intervals

B. 10-foot intervals
Explanation
Threaded pipe (I.P.S.) with a 3/4 inch diameter, when installed horizontally, should be supported at approximately 10-foot intervals. This means that there should be a support every 10 feet along the length of the pipe to ensure proper stability and prevent sagging or damage. Proper support is important to maintain the integrity and functionality of the pipe system.

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• 44.

### Piping in the ground shall be laid on __-.

• A.

A firm bed

• B.

Concrete blocks

• C.

Redwood stakes

• D.

Common bricks

A. A firm bed
Explanation
Piping in the ground should be laid on a firm bed to provide stability and prevent movement. This ensures that the pipes are properly supported and reduces the risk of damage or breakage. A firm bed provides a solid foundation for the piping system, allowing it to withstand external pressures and loads. It also helps to distribute the weight of the pipes evenly, preventing uneven settling or sinking. Overall, laying piping on a firm bed is essential for the long-term durability and functionality of the system.

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• 45.

### Gutters in public shower rooms shall be sloped not less than ___

• A.

2%

• B.

3%

• C.

5%

• D.

10%

A. 2%
Explanation
The correct answer is 2%. This is because a slope of at least 2% is necessary in gutters in public shower rooms to ensure proper drainage. A 2% slope allows water to flow smoothly towards the drain, preventing any pooling or standing water which can lead to slip hazards and unsanitary conditions. A steeper slope may cause water to flow too quickly, potentially causing splashing and increasing the risk of slipping. Therefore, a 2% slope is the ideal choice for gutters in public shower rooms.

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• 46.

### PEX piping may be coupled together with shielded couplings.

• A.

True

• B.

False

• C.

Maybe

B. False
Explanation
PEX piping cannot be coupled together with shielded couplings. Shielded couplings are typically used for joining different types of piping materials, such as PVC or cast iron, and are not designed for use with PEX piping. PEX piping is typically joined using crimp or clamp fittings specifically designed for PEX. Therefore, the correct answer is false.

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• 47.

### The type of acceptable joints for PEX shall be  ___

• A.

Metal insert or metal compression

• B.

Solvent cemented

• C.

Sheilded coupling

• D.

Mechanical

A. Metal insert or metal compression
Explanation
The acceptable joints for PEX shall be metal insert or metal compression. This means that when connecting PEX pipes, it is recommended to use joints that involve metal inserts or compression fittings. These types of joints provide a secure and reliable connection, ensuring that the PEX pipes are properly sealed and will not leak. Using solvent cemented, shielded coupling, or mechanical joints may not be suitable for PEX pipes and could result in potential issues with the plumbing system.

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• 48.

### Copper tubing installed vertically shall be supported at each storey or at maximum intervals of  ___.

• A.

4 ft

• B.

10 ft

• C.

8 ft

• D.

6 ft

B. 10 ft
Explanation
Copper tubing installed vertically needs to be supported at each storey or at maximum intervals of 10 ft. This is necessary to prevent excessive sagging or bending of the tubing due to its weight. Proper support ensures that the tubing remains secure and does not cause any damage or leaks in the plumbing system.

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• 49.

### Mechanical devices may be used to complete backfilling where covering above any piping is at least ___ inches

• A.

6

• B.

12

• C.

30

• D.

36

B. 12
Explanation
Mechanical devices are used for backfilling when there is a need to cover piping. The covering above the piping should be at least 12 inches. This ensures that the piping is adequately protected and prevents any damage or disruption to the piping system. A covering of 12 inches provides a sufficient layer of protection and helps to maintain the integrity and functionality of the piping.

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• 50.

### Two-inch horizontal copper tubing drain pipe shall be supported at ___

• A.

4 foot intervals

• B.

6 foot intervals

• C.

10 foot intervals

• D.

12-foot intervals

C. 10 foot intervals
Explanation
The correct answer is 10 foot intervals. This means that the two-inch horizontal copper tubing drain pipe should be supported every 10 feet. Supporting the pipe at regular intervals helps to prevent sagging, which could lead to blockages or leaks in the drainage system. By providing support every 10 feet, the pipe will remain stable and maintain proper drainage flow.

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• Current Version
• Apr 07, 2024
Quiz Edited by
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• Jul 22, 2011
Quiz Created by
Punkd12

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