New York City Master Plumbers Practice Exam

These questions are part of the practice quiz. Start practicing

• What is the minimum drain size for a laundry tub?
• When lagging is used on steam pipes, its main function is to?
• What type of piping should not be used for drinking water systems in NYC?
• What is required before installing a new plumbing fixture?
• Which material would be the least suitable for building drains?
• What is the primary purpose of a backflow prevention assembly?
• What is the minimum weight requirement for a hard lead floor flange?
• A branch that terminates at a developed length of 2 feet or more by means of a plug, cap, or flange is considered a...
• What is the minimum depth for burying water supply lines in NYC?
• What is the required minimum distance for rock removal during trenching?
• Which piping material is suitable for underground drain, waste, and vent applications?
• What type of protective device is required for hoses connected to a wash sink?
• What could cause a trap to lose its seal if it is set more than 2 feet below the fixture outlet?
• What is the maximum running length for a trap arm?
• What is the equivalent smoke pressure to inches of water that should be applied when performing a smoke test?
• What material should be used for underground water distribution in plumbing?
• What type of fill material is prohibited under the NYC Plumbing Code for sewer lines?
• What is the minimum size required for a laundry vent in NYC?
• What is the minimum center-to-wall distance for all non-ADA fixtures?
• What is the important consideration for plumbing installations in flood-prone areas?
• What is the definition of a relief vent?
• In NYC, what is the maximum allowable pressure for backflow preventer testing?
• What type of valve should be used for a gas line in a plumbing system?
• How can lead pipes typically be identified in older construction?
• In plumbing, what does "sizing a pipe" refer to?
• What responsibility does the master plumber have regarding welders?
• What is the primary purpose of a grease trap in commercial kitchens?
• What are the three primary materials used for water supply piping in NYC?
• What is the purpose of using a relieving arch or pipe sleeve when a pipe passes through a wall?
• What is one of the primary uses of copper piping in plumbing systems?
• What is the maximum length that piping for continuous waste should extend?
• What is the minimum pipe size allowed for a condensate drain?
• What is the purpose of a backflow preventer in plumbing systems?
• What is a use for Type K copper or copper-alloy tubing?
• What is a typical sign of a plumbing leak?
• What is the purpose of a vent in a plumbing system?
• In plumbing terminology, what does "cross-connection" refer to?
• What is the purpose of a plumbing permit?
• What is the minimum size for a residential kitchen sink drain?
• A pipe that conveys only waste, free from fecal matter, is known as what?
• What type of waste is typically classified as sewage?
• What is the primary function of a trap in plumbing?
• What is the purpose of a water hammer arrestor?
• What is the significance of maintaining plumbing systems regularly?
• What is the minimum center-to-center distance for all non-ADA fixtures?
• According to the NYC plumbing code, what is the required slope for a 3-inch diameter drain line?
• What is the vertical measurement distance between connections required for branch intervals?
• Which type of valve is commonly used to control water flow in plumbing systems?
• What is the maximum length for a continuous run of vent pipe?
• When must a plumbing contractor obtain a plumbing license in NYC?
• How often should backflow preventers be tested?
• What is the maximum horizontal distance allowed for vent pipes to connect to a drainage system?
• What is required when connecting dissimilar metals in plumbing systems?
• Which method is used for testing backflow prevention devices?
• What is the term for a pipe that conveys storm water from the roof to a storm or combined building drain?
• What is one of the uses for copper or copper-alloy pipe in plumbing?
• What is the minimum distance required between a water supply line and a sewer line according to NYC plumbing code?
• The section of a building house sewer that a permit from the DEP is issued for is between the spur connection of the street sewer and the?
• What is the minimum front-to-door distance for all non-ADA fixtures?
• What can polyolefin piping be primarily used for in plumbing?
• During the installation of drainage systems, what should be continuously measured?
• How often must grease interceptors be cleaned in NYC?
• Which standard must plumbing fixtures comply with in New York City?
• What is the maximum slope for a drainage pipe in NYC?
• For what plumbing purposes can cast iron pipe be used?
• What is the primary function of a pressure reducing valve?
• What kind of vent connection serves as a vent for both fixtures at the junction of two fixture drains?
• What materials are commonly used for ABS piping?
• What is a "plumbing chase"?
• Which of the following is not a type of pipe used in drainage systems?
• What type of vent connects to a horizontal branch and can vent multiple traps?
• What is a vent's primary purpose in plumbing systems?
• How often should a plumbing system be tested for leaks?
• What happens if the installed height of a trap is too low?
• What method is used for testing drainage systems in plumbing?
• How frequently must inspections be made of backflow prevention assemblies?
• What defines hot water?
• Which material is generally not recommended for use in high-pressure gas lines?
• Which type of pipe is commonly used for gas supply lines in NYC?
• What type of tools should be used for installing plumbing fixtures?
• In non-covered and open mall buildings, toilet facilities must be located within how many feet for travel?
• What is the minimum temperature for hot water supplied to faucets according to NYC standards?
• What is the minimum size for a sanitary sewer pipe for a residential building?
• Which code governs plumbing work in New York City?
• A pipe that conveys storm water from the roof to a storm drain is called what?
• What does the term "fixture unit" refer to in plumbing?
• At what distance from an exterior building wall is a building drain no longer considered a building drain?
• What is the primary function of any relief vent in plumbing systems?
• Which type of pipe is not allowed for potable water supply in NYC?
• What is the minimum size of a waste outlet that a shower can have?
• Which fixture typically requires a trap in plumbing?
• What is the minimum working pressure for a plumbing system in NYC?
• How often should plumbing systems be inspected in commercial settings?
• What plumbing purpose can Type L copper tubing serve?
• What does proper PPE consist of for plumbing work?
• Which material is prohibited for use in underground plumbing lines in NYC?
• Which plumbing component is essential for backflow prevention?
• What can cause a fixture below a slug of water in a stack to lose its trap seal?
• At what diameter should rigid support sway bracing be provided for piping changes greater than 45 degrees?
• What is the purpose of a water meter in plumbing systems?
• What should you check after installing a toilet?
• What are two common types of water heaters used in residential plumbing?
• What does a well-constructed drainage plan help prevent?
• What is a primary concern when conducting a plumbing inspection?
• What is the standard pressure for municipal water supply in NYC?
• What percentage of antimony by weight must a lead floor flange contain?
• What is the minimum height that a fresh air inlet must extend above grade?
• What does the term "Critical Level (C-L)" refer to in plumbing?
• In NYC, what is the acceptable pressure for water distribution systems?
• What type of valve is typically used to control water flow in pressurized systems?
• In covered and open mall buildings, public/staff toilet facilities should not exceed what distance for travel?
• What is the minimum weight of sheet copper used for vent pipe flashing?
• What is the maximum allowable distance for a vent from the trap of a fixture?
• What is the main purpose of a building drainage plan?
• What type of pipe conveys sewage containing fecal matter?
• What is required when a pipe passes through a footing or foundation wall?
• What is the minimum size of a floor drain for commercial applications?
• For what plumbing purpose can ABS plastic pipe be used?
• What is the purpose of a pressure-reducing valve?
• Which type of plumbing pipe is specifically designed for above ground drain, waste, and vent applications?
• What is the main reason for installing a cleanout in plumbing systems?
• What is the required slope for horizontal drainage pipes?
• For what purpose are drainage systems designed?
• What indicates a need for a plumbing inspection?
• What is the maximum number of fixtures allowed on a single vent according to NYC regulations?
• What is a common noise indicating a plumbing issue?
• What type of permit is required before starting plumbing work in NYC?
• What is the purpose of a backflow preventer?
• What is the purpose of a sump pump?
• What is generally the result of not properly venting plumbing systems?
• What is the minimum weight for sheet copper used for flush tank linings per square foot?
• What is the minimum depth for underground water supply lines?
• What type of pipe is commonly used for potable water supply in plumbing systems?
• What is an appropriate application for stainless steel (304/304L) piping?
• Which of the following materials is likely to suffer dezincification?
• What type of valve is essential for isolating sections of a plumbing system for repairs?
• What is the purpose of a trap primer in plumbing systems?
• Which type of system is commonly used for stormwater management on construction sites?
• What is a common cause of sewer gas odors in buildings?
• What is the primary code that governs plumbing installations in New York City?
• How can plumbers prevent condensation on HVAC ductwork?
• Which situation requires immediate plumbing attention?
• Which component is crucial for ensuring safe water supply and preventing contamination?
• How long must a section be tested with the minimum water head?
• What is required for the installation of plumbing in multi-family buildings?
• In plumbing, what does the term 'liquid seal' refer to for fixture traps?
• What is a common cause of water hammer in plumbing systems?
• A swimming pool is defined as any structure basin, chamber, or tank containing an artificial body of water for swimming, diving, or bathing having a depth of "xxx" or more?
• What is one of the key responsibilities of a master plumber?
• What is the recommended practice for maintaining plumbing systems in NYC?
• What is a common type of piping used for hydronic heating systems?
• What is required for the installation of a water heater in NYC?
• What type of plumbing configuration is prohibited due to potential backflow issues?
• What is the maximum height allowed for a plumbing vent above the roof?
• Which plumbing code section addresses potability standards?
• What is the primary risk associated with improperly installed plumbing in restaurants?
• Combination drain and vent pipe shall have a maximum slope of?
• What is the minimum water head that shall be applied to drainage systems during testing?
• How many days notice must a master plumber give to the commissioner when plumbing work is ready for tests?
• What test must be passed to verify the integrity of a plumbing system before it is put into service?
• What must be checked regularly to ensure plumbing systems are functioning correctly?
• In terms of plumbing standards, which organization sets the benchmark for safety and compliance?
• What is a necessary guideline for the slope of drainage lines?
• Which of the following pipes can only be used in residential buildings with 5 stories or less?
• What is the purpose of a vent stack in plumbing systems?
• What is the minimum size for a fresh air inlet relative to the building drain at the connection?
• What is the purpose of using Trisodium Phosphate (TSP) before brazing a joint?
• What is the term for the corrosion and weakening of brass objects due to zinc dissolving?
• For how long must construction documents be kept on file after project completion?
• What is the minimum slope for a sanitary sewer pipe?
• What must be done to ensure that pipes do not freeze during winter?
• Which pipe fittings are generally required at pipe penetrations through walls?
• Where must the abandonment of existing building sewer connections be securely sealed?
• What unit of measurement is used to express water flow in faucets?
• In NYC, who is responsible for obtaining plumbing permits?
• What can improper drainage slope lead to?
• What is the minimum ventilation required for a bathroom according to NYC code?
• Which documents must be submitted for a plumbing permit in NYC?
• What safety measure is essential when working with sewer pipes?
• What is the formula for calculating the number of fixture units for a plumbing system?
• What kind of pipe is commonly used for drainage systems due to its durability?
• What is the effect of back-pressure in plumbing systems?
• In plumbing, what does “head pressure” refer to?
• If the fresh air inlet terminates with a return bend, what is the required minimum height above grade?
• What is considered a fixture unit in plumbing?
• An extension of a soil or waste stack above the highest horizontal drain is classified as what?
• What is the minimum weight for sheet lead used for pans per square foot?
• How often must plumbing systems in NYC be inspected?
• Liquid waste containing animal or vegetable matter is classified as what?
• What type of tubing can be used for above ground drain, waste, and vent applications?
• What is the required spacing for plumbing cleanouts in a horizontal drain line?
• A combustible gas which may be present in sewer air and is explosive in the presence of oxygen is?
• What is the appropriate liquid seal measurement for a plumbing trap?
• What should be the minimum wall thickness of lead bends and traps?
• Which of the following is a key component of toilet installation?
• What is required before a plumbing installation can be covered up?
• What is a common symptom of a partially blocked vent stack?
• What is the drainage requirement for an island sink?
• What is primarily found in sewer air that poses an explosive risk?
• What is the purpose of sealing existing building sewer connections?
• Which agency in New York City oversees plumbing and sanitation regulations?
• What is one requirement when installing new plumbing fixtures?
• For which applications can PVC pipe be used in residential buildings?
• What is the required clearance above a floor for sewer vent pipes?
• How is water supply pressure typically tested in plumbing?
• What size pipe is commonly used for residential water supply lines?
• The maximum allowable slope for a combination drain and vent pipe is?
• What does "ANSI" stand for in plumbing standards?
• What is the minimum diameter for a fresh air inlet if it is not less than a specific size?
• What does "drainage grade" refer to in plumbing?
• How do you determine the size of a water meter required for a building?
• What is the primary purpose of an air gap in plumbing systems?
• What is the minimum size for openings on the strainer of a shower?
• What is the term for the unobstructed open edge of a fixture?
• Which piping is acceptable for underground water distribution?
• A group of fixtures consisting of a water closet, lavatory, bath tub or shower, including or excluding a bidet, and an emergency floor drain or both in the same room can be defined as a?
• What is the minimum size for a residential shower drain?
• What is the primary use of CPVC piping in plumbing?
• What additional treatment should sheet lead be coated with?
• What is the primary concern with using a sump pump?
• What does the term "fall" refer to in plumbing?
• For how many years must records of backflow prevention inspections be retained?
• What material is commonly used for potable water distribution in plumbing systems?
• Which pipe material is most suitable for underground drain, waste, and vent applications?
• What type of pipe is used specifically for venting waste gases from plumbing systems?
• What plumbing standard does New York City primarily adhere to?
• How are drainage systems sized according to the NYC Plumbing Code?
• How often should backflow prevention devices be tested?
• What devices may be required for some medical facilities to prevent backflow?
• How many fixture units are allowed for a single sink in NYC?
• What is referred to as waste piping from two or more fixtures on one trap?
• How much should sheet copper for general applications weigh per square foot at a minimum?
• What is one of the major focuses of plumbing codes?
• In plumbing, what does the term 'fixture unit' refer to?
• Why is ventilation important when working on sewer pipes?
• Dezincification of brass pipe occurs most often with which type of brass?
• What is the approximate rate of discharge from a single "fixture unit"?
• What is the first step in the procedure to install a toilet?
• What is the minimum weight for sheet lead when it is used for flashing?
• What is the role of a plumbing inspector?
• How long must a licensed master plumber maintain records identifying all welds?
• Which plumbing fixture must be installed with a specific floor drain?
• How should drainage lines be configured to ensure proper function?
• How far must fresh air inlet pipes be connected to the building drain?
• What is defined as the lowest portion of the inside top surface of the channel through the trap?
• In New York City, who is required to verify that plumbing installations comply with code?
• Each fixture trap shall have a liquid seal of not less than "xxx" inches and not more than "xxx" inches?
• What is the minimum size for a residential fire suppression system pipe?
• What is the code required for high-efficiency toilets in NYC?
• What is the primary purpose of a radon vent pipe?
• Which application is not suitable for ABS pipe in plumbing?
• What type of piping is specifically used for building drains?
• According to NYC plumbing code, what must be avoided to prevent contamination?
• Which document outlines the rights and responsibilities of licensed plumbers in NYC?
• What does "DWV" stand for in plumbing terminology?
• What needs to be done if a plumbing system experiences continuous drainage issues?
• What plumbing applications can brass pipe be utilized for?
• Which type of stainless steel piping is suitable for underground water distribution?