Journeyman's Exam 258 Questions with Complete Solutions.
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Journeyman\\\'s
Journeyman'sExam258QuestionswithComplete
Solutions.
Threads of drainage fittings shall be tapped as to allow _____ pitch per foot - Correct
Answer 1/4"
Lead used for safe pans shall not be less than ________ per square foot - Correct Answer
4 lbs
Name 3 allowable materials for the DWV system ...
Journeyman's Exam 258 Questions with Complete
Solutions.
Threads of drainage fittings shall be tapped as to allow _____ pitch per foot - Correct
Answer 1/4"
Lead used for safe pans shall not be less than ________ per square foot - Correct Answer
4 lbs
Name 3 allowable materials for the DWV system "underground" - Correct Answer Copper
Tube, Cast Iron, Stainless steel, ABS, PVC DWV
What are the fixture unit values for the following traps - Correct Answer 1-1/4" - 1 dfu's
1-1/2" - 3 dfu's
2" - 4 dfu's
3" 6 dfu's
4" - dfu's
What type of fitting is used for continuous waste and venting of lavatories back to back? -
Correct Answer Double fixture fitting
Caulk joints for cast iron bell and spigot shall be filled with molten lead to a depth of not
less than ________? - Correct Answer 1"
What type of fitting or fittings can be used to connect horizontal drainage to another
horizontal drainage line? - Correct Answer Wye, Combination Wye w/ 1/8 bend, Long
sweep
Cleanout locations required by code - Correct Answer - Each horizontal drainage pipe
shall be provided with a cleat at its upper terminal
- Horizontal run more than 100'
- Each horizontal change of direction exceeding 135°
- Front Main Cleanout
Maximum distance a cleanup can be spaced apart - Correct Answer 100'
Minimum clearance in front of a cleanup for 2" or less
Minimum clearance in front of a cleanup for 2" or more - Correct Answer 12"
18"
Underfloor cleanup shall not be located more than _____ from an access door, trap door,
or crawl hole - Correct Answer 20'
,When plumbing fixtures are installed on a floor level lower than the next upstream
manhole cover of the sewer, such drainage piping shall be protected from backflow of
sewage by a ____________ - Correct Answer Back Water Valve
Sewage ejectors receiving the discharge of water closets or ruinals shall have a discharge
capacity not less than ___ gallons per minute - Correct Answer 20
What is the minimum size discharge pipe for an ejector installed in a single dwelling? -
Correct Answer 2"
The lowest inlet connected to the ejector pump shall have a clearance of not less than
____ from the high water or starting level of the sump. - Correct Answer 2"
Can macerating toilet systems be installed instead of a sewage pump system - Correct
Answer Yes, with prior approval of the AHJ
What is the minimum size discharge pipe for a macerating toilet system - Correct Answer
3/4"
What is the minimum pitch required fora 2" horizontal drain? - Correct Answer 1/4" per foot
The discharge line from an ejector pump shall be provided with an accessible
___________ and gate or ball valve. - Correct Answer Swing check valve
Where shall the gate valve be located on the discharge line on an ejector pump - Correct
Answer Downstream of the backwater valve
Drainage connections shall not be made into a drainage piping system within ________ of
an vertical or horizontal change in direction of a stack containing suds producing fixtures. -
Correct Answer 8'
What are the requirements when testing the DWV system Water and Air? - Correct
Answer 10' Head of water for 15 minutes
5 psi for and air test
When is the public sewer considered not being available? - Correct Answer When the
dwelling is more than 200' away from the sewer.
At what point does the building sewer begin? - Correct Answer 2' away from the building
How is the size of the building sewer determined? - Correct Answer DFU's
What is the maximum distance allowed between approved manholes? - Correct Answer
300'
, When a water pipe and sewer pipe are placed in a common trench what is the minimum
distance above the top of the sewer line to the bottom of the water pipe? - Correct Answer
12"
When a water pipe and sewer pipe are placed in a common trench what is the minimum
clear horizontal distance the water pipe shall be from the sewer pipe? - Correct Answer
12"
A 4' drainage line has to be run at a pitch of 1/8" per foot. How is the maximum fixture unit
low now determined? - Correct Answer By taking 80% of the total DFU's = 173 DFU's
Purpose of plumbing code. - Correct Answer Provide minimum requirements and
standards for the protection of the public health, safety, and welfare.
Openings into drainage or vent system excepting those opening to which plumbing
fixtures are properly connected or which constitute vent terminals shall be permanently
plugged or _________ in an approved manner. - Correct Answer Capped
Who is responsible for maintaining the plumbing and drainage system in a building? -
Correct Answer Owner or owners agent
What is meant by the term "existing work"? - Correct Answer Work or systems that have
already been installed prior to the effective date of the existing code.
What type of work is exempt from a plumbing permit? - Correct Answer Blockages or
leaks
If work is not started, how many days is a permit valid? - Correct Answer 180 Days
When can plumbing work be covered and concealed? - Correct Answer After it has been
tested, inspected, and approved
Who notifies the authority have jurisdiction when plumbing work is ready for inspections? -
Correct Answer Person with the permit, doing the work
What is the purpose of a vacuum relief valve - Correct Answer Prevent siphonage
What is the purpose of the anode rod? - Correct Answer To slow corrosion of the inside of
the tank
What is the purpose of the dip tube? - Correct Answer To send cold water to the bottom of
the tank
What is the purpose of the anti-siphon hole? - Correct Answer To prevent siphonage and
back pressure on the dip tube.
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