MASTER PLUMBER EVALUATION EXAM ACTUAL
QUESTIONS AND SOLUTIONS RATED A+
✔✔Fixture clearances in front - ✔✔21 inch clearance in front of toilets urinals and
lavatories; also between the front of the toilet and the side of the tub
✔✔Fixture clearances between toilets side by side - ✔✔30 inches center to center
✔✔Spacing between the sink and the toilet on the same wall - ✔✔4 inches
✔✔Spacing between center of toilet and end of tub - ✔✔15 inches for other buildings
and 12 inches for dwellings
✔✔Spacing between lavatory and end of bathtub - ✔✔2 inches
✔✔Clearance in front of a stall shower - ✔✔24 inches
✔✔Area that must be covered with waterproof material for urinals - ✔✔4 feet high 1 foot
to the left and to the right, one foot plus the depth of the urinal in front
✔✔What size should the floor drain be if provided for emergency eyewash or shower
station - ✔✔If provided for emergency showers and eyewash stations, floor drains and
their fixture drain branches shall be sized for the gallon per minute discharge capacity of
the shower or eye wash but the drainage fixture unit load on the sanitary drain system
shall be zero.
✔✔What 3 common locations are floor drains required - ✔✔1-Toilet rooms containing
either two or more toilets, a wall hung urinals , or a combination of the two. Except in a
dwelling unit
2-commercial kitchens
3-common laundry rooms in commercial buildings and buildings having more than two
dwelling units
✔✔What temperature should emergency eyewash and shower equipment be sent to
the range - ✔✔The temperature for an emergency eye wash station or emergency
shower should be 65° to 95°F unless the designer has indicated that other specific
temperatures are required to provide protection for particular hazard
✔✔Vertical support for cast iron - ✔✔At the base of the stack and every story
✔✔Vertical support for steel threaded pipe - ✔✔Every other story
,✔✔Vertical support for Copper tubing - ✔✔And every story height but not more than 10
foot intervals
✔✔Vertical support for pex - ✔✔Each story high and at mid story
✔✔Vertical support for stainless steel drainage pipe - ✔✔At each story height
✔✔Horizontal support for cast iron - ✔✔One hanger per pipe length and it must be
within 18 inches of each joint up to 10 feet maximum spacing. Also at Changes direction
and branch connections.
✔✔Horizontal support for copper tubing 1 1/4 or smaller - ✔✔6 foot intervals
✔✔Horizontal support for 1 1/2 inch or larger - ✔✔10 four intervals
✔✔Horizontal support for lead pipe - ✔✔On continuous metal or wood strips for its
entire length
✔✔Horizontal support for pex - ✔✔32 inches
✔✔Horizontal support for stainless steel drain piping - ✔✔10 foot intervals, changes of
direction and branch connection
✔✔Horizontal and vertical support for plastic drains - ✔✔Whatever the manufacture
specifies
✔✔What is the minimum psi flowrate fixture and what is the exception for pressure
assisted toilet's and blowback urinals - ✔✔15 psi minimum at faucets. 20 psi for
flushometers and 25 psi for pressure assisted bladder tank toilets
✔✔Conversion of flow in gallons per minute to DFU - ✔✔Where the discharge rate of
fixtures your equipment is expressing gallons per minute to drainage fixture yours shall
be allowed for each gallon per minute of flow
✔✔Dfu load on bathrooms having 1.6 gallon per flush toilets for individual dwelling units
as well as serving three or more dwelling units (half bath) - ✔✔Individual is three and
three or more dwelling units is 2
✔✔Dfu load on bathrooms having 1.6 gallon per flush toilets for individual dwelling units
as well as serving three or more dwelling units (1 bathroom group) - ✔✔Individual is 5
dfu and multi dwelling is 3 dfu
, ✔✔How many bathrooms can you put on a 3 inch line when using less then 3.4 gallons
per flush toilets when sized for a single dwelling unit - ✔✔There cannot be more than 6
toilets or 6 bathroom groups on one 3 inch building drain or building sewer
✔✔How many toilets can be put on a 3 inch line when using 3.5 gallons per flush toilets
when sized for a single dwelling unit - ✔✔There cannot be more than 3 toilets or 3
bathroom groups on one building drain or building sewer
✔✔How many bathrooms can be on a 3 inch line using 3.4 gallon per flush toilets sized
for other than single dwelling units - ✔✔There may not be more than 4 toilets or
bathroom groups of 3 inch drain or building sewer when using 3.4 gallons per flush or
less toilets
✔✔How many bathrooms or toilets can be on a 3 inch line using 3 1/2 gallon per flush
toilets or more in then other than single dwelling unit - ✔✔No more than two toilets shall
be permitted
✔✔Branch vent - ✔✔A vent connection one or more individual vents with a vent stack or
stack vent
✔✔Common vent - ✔✔A vent connected at a common connection of two fixture drains
and serving as a vent for both fixtures
✔✔Area drain - ✔✔A receptor designed to collect surface or storm water from an open
area
✔✔Venting system design - ✔✔Venting system shall be designed and installed so that
at no time will the trap seals be subjected to a pneumatic pressure differential of more
than one inch of water Coulmn under design load conditions
✔✔What angle is an isometric drawling drawn - ✔✔30 degrees
✔✔Diagonal constant for a 90 degree angle - ✔✔1
✔✔Diagonal constant for a 60 degree angle - ✔✔1.155
✔✔Diagonal constant for a 45 degree angle - ✔✔1.414
✔✔Diagonal constant for a 22.5 degree angle - ✔✔2.613
✔✔Setback constant for 90 degree angle - ✔✔0
✔✔Setback constant for 60 degree angle - ✔✔0.577
QUESTIONS AND SOLUTIONS RATED A+
✔✔Fixture clearances in front - ✔✔21 inch clearance in front of toilets urinals and
lavatories; also between the front of the toilet and the side of the tub
✔✔Fixture clearances between toilets side by side - ✔✔30 inches center to center
✔✔Spacing between the sink and the toilet on the same wall - ✔✔4 inches
✔✔Spacing between center of toilet and end of tub - ✔✔15 inches for other buildings
and 12 inches for dwellings
✔✔Spacing between lavatory and end of bathtub - ✔✔2 inches
✔✔Clearance in front of a stall shower - ✔✔24 inches
✔✔Area that must be covered with waterproof material for urinals - ✔✔4 feet high 1 foot
to the left and to the right, one foot plus the depth of the urinal in front
✔✔What size should the floor drain be if provided for emergency eyewash or shower
station - ✔✔If provided for emergency showers and eyewash stations, floor drains and
their fixture drain branches shall be sized for the gallon per minute discharge capacity of
the shower or eye wash but the drainage fixture unit load on the sanitary drain system
shall be zero.
✔✔What 3 common locations are floor drains required - ✔✔1-Toilet rooms containing
either two or more toilets, a wall hung urinals , or a combination of the two. Except in a
dwelling unit
2-commercial kitchens
3-common laundry rooms in commercial buildings and buildings having more than two
dwelling units
✔✔What temperature should emergency eyewash and shower equipment be sent to
the range - ✔✔The temperature for an emergency eye wash station or emergency
shower should be 65° to 95°F unless the designer has indicated that other specific
temperatures are required to provide protection for particular hazard
✔✔Vertical support for cast iron - ✔✔At the base of the stack and every story
✔✔Vertical support for steel threaded pipe - ✔✔Every other story
,✔✔Vertical support for Copper tubing - ✔✔And every story height but not more than 10
foot intervals
✔✔Vertical support for pex - ✔✔Each story high and at mid story
✔✔Vertical support for stainless steel drainage pipe - ✔✔At each story height
✔✔Horizontal support for cast iron - ✔✔One hanger per pipe length and it must be
within 18 inches of each joint up to 10 feet maximum spacing. Also at Changes direction
and branch connections.
✔✔Horizontal support for copper tubing 1 1/4 or smaller - ✔✔6 foot intervals
✔✔Horizontal support for 1 1/2 inch or larger - ✔✔10 four intervals
✔✔Horizontal support for lead pipe - ✔✔On continuous metal or wood strips for its
entire length
✔✔Horizontal support for pex - ✔✔32 inches
✔✔Horizontal support for stainless steel drain piping - ✔✔10 foot intervals, changes of
direction and branch connection
✔✔Horizontal and vertical support for plastic drains - ✔✔Whatever the manufacture
specifies
✔✔What is the minimum psi flowrate fixture and what is the exception for pressure
assisted toilet's and blowback urinals - ✔✔15 psi minimum at faucets. 20 psi for
flushometers and 25 psi for pressure assisted bladder tank toilets
✔✔Conversion of flow in gallons per minute to DFU - ✔✔Where the discharge rate of
fixtures your equipment is expressing gallons per minute to drainage fixture yours shall
be allowed for each gallon per minute of flow
✔✔Dfu load on bathrooms having 1.6 gallon per flush toilets for individual dwelling units
as well as serving three or more dwelling units (half bath) - ✔✔Individual is three and
three or more dwelling units is 2
✔✔Dfu load on bathrooms having 1.6 gallon per flush toilets for individual dwelling units
as well as serving three or more dwelling units (1 bathroom group) - ✔✔Individual is 5
dfu and multi dwelling is 3 dfu
, ✔✔How many bathrooms can you put on a 3 inch line when using less then 3.4 gallons
per flush toilets when sized for a single dwelling unit - ✔✔There cannot be more than 6
toilets or 6 bathroom groups on one 3 inch building drain or building sewer
✔✔How many toilets can be put on a 3 inch line when using 3.5 gallons per flush toilets
when sized for a single dwelling unit - ✔✔There cannot be more than 3 toilets or 3
bathroom groups on one building drain or building sewer
✔✔How many bathrooms can be on a 3 inch line using 3.4 gallon per flush toilets sized
for other than single dwelling units - ✔✔There may not be more than 4 toilets or
bathroom groups of 3 inch drain or building sewer when using 3.4 gallons per flush or
less toilets
✔✔How many bathrooms or toilets can be on a 3 inch line using 3 1/2 gallon per flush
toilets or more in then other than single dwelling unit - ✔✔No more than two toilets shall
be permitted
✔✔Branch vent - ✔✔A vent connection one or more individual vents with a vent stack or
stack vent
✔✔Common vent - ✔✔A vent connected at a common connection of two fixture drains
and serving as a vent for both fixtures
✔✔Area drain - ✔✔A receptor designed to collect surface or storm water from an open
area
✔✔Venting system design - ✔✔Venting system shall be designed and installed so that
at no time will the trap seals be subjected to a pneumatic pressure differential of more
than one inch of water Coulmn under design load conditions
✔✔What angle is an isometric drawling drawn - ✔✔30 degrees
✔✔Diagonal constant for a 90 degree angle - ✔✔1
✔✔Diagonal constant for a 60 degree angle - ✔✔1.155
✔✔Diagonal constant for a 45 degree angle - ✔✔1.414
✔✔Diagonal constant for a 22.5 degree angle - ✔✔2.613
✔✔Setback constant for 90 degree angle - ✔✔0
✔✔Setback constant for 60 degree angle - ✔✔0.577
