plumbing exam questions with answers ,

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Institution Plumbing

Course Plumbing

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plumbing exam questions with answers // // // // //

A journeyman plumber and an apprentice, who are employed by
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a master plumber, are installing the DWV-system and water
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distribution system in a 2-½ story single family dwelling.
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QUESTION: What answer below shall be considered most correct
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to complete the following "Plumbing code knowledge" related
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statement: A trap that serves a single shower stall that is
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equipped with a hand shower, a rain head, and a standard
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shower head shall be no less than ________ in minimum diameter
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A) 1-½" B) 2" C) 2-½" D) 3" - CORRECT ANSWERS(S)✔✔2
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inches
//

A journeyman plumber and apprentice are installing 3-inch floor
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drains in an open-parking-garage that is subject to freezing
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temperatures. QUESTION: What answer below shall be
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considered most correct to complete the following "Plumbing
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code knowledge" related statement: The installation of traps at
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the floor drain locations which are found susceptible to freezing
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temperatures may be __________.
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A)Increased to 4-inch B) Eliminated C) Wrapped with freeze
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protection cable D) Insulated - CORRECT
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ANSWERS(S)✔✔eliminated
//

,A journeyman plumber and apprentice are installing lab sinks
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with faucets that are connected to an acid waste system for-
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(special hazardous waste) in a medical lab. What answer below
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shall be considered most correct to complete the following
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"Plumbing code knowledge" related statement: Vacuum breakers
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shall be installed with the critical level at least _____-inches
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above the flood level rim of the fixture they serve and on the
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discharge side of the last control valve to the fixture.
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A) 12 B) 6 C) 18 D) 3 - CORRECT ANSWERS(S)✔✔6 inches
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What answer below shall be considered most correct to complete
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the following "Plumbing code knowledge" related statement: No
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plumbing permit shall be issued for cross connection
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installations that require ______________ until the application for a
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permit is accompanied by a letter of approval from the
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Massachusetts Department of Environmental Protection or its
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designee.
//

A) RPBP B) A "critical level" height C) Atmospheric vacuum
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breakers D) Water recycling systems - CORRECT
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ANSWERS(S)✔✔reduced pressure backflow preventer (RPBP)
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: What answer below shall be considered most correct to
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complete the following "Plumbing code knowledge" related
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, statement: The waste discharge from safe waste pans serving
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water heaters or hot water storage tanks where there is _______
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below and shall be piped indirectly to a properly trapped and
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vented fixture.
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A) People B) Occupancy C) Floors D) Plumbing connections -
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CORRECT ANSWERS(S)✔✔occupancy
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GIVEN: A journeyman plumber and an apprentice, (who are
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employed by a master plumber), are installing the sanitary DWV
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and water distribution system in a five-story residential
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condominium complex. QUESTION: What answer below shall be
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considered most correct to complete the following "Plumbing
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code knowledge" related statement: CPVC-(Chlorinated Polyvinyl
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Chloride) pipe and fittings may be used provided that none of
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this material is located within ____-inches of any connection to a
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hot water tank as defined in MGL. c. 142, § 17
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A) 12 B) 18 C) 20 D) 24 E) 30 - CORRECT ANSWERS(S)✔✔24
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inches
//

: A journeyman plumber and apprentice are roughing-in multiple
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fixtures in a new fitness center. The facility will include a juice
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bar, temporary daycare room, men's and women's toilet facilities
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and men's and women's locker rooms. QUESTION: What answer
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below shall be considered most correct to complete the
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, following "Plumbing code knowledge" related statement: A
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________-vent is a branch vent that serves two or more floor-
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outlet fixtures that are battery wasted. The vent extends from
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the top of the horizontal soil and/or waste branch in front of
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the last fixture waste and connects to a vent stack or stack vent
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that is adjacent to the down-stream end of the horizontal
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branch.
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A) Side B) Loop C) Relief D) Circuit - CORRECT
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ANSWERS(S)✔✔loop
//

MATCH: //

Elevated pressure // //

Flow designation // //

Ten P.S.I.G. or less
// // //

// Less than 2-P.S.I// // //

A) 3 P.S.I.G. or ten times
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B) Inlet pressure
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// C) E.H.D.
//

D) Prof. Engineer - CORRECT ANSWERS(S)✔✔elevated pressure-
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d
//

flow designation-c
//

Ten P.S.I.G. or less-a
// // //

Less than 2-P.S.I-b
// //

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Uploaded on: March 28, 2026
Number of pages: 60
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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