PLUMBING RED SEAL EXAM
QUESTIONS AND ANSWERS
Which of the following best describes an electric water heater? - Answer-one with an
immersion type element
A trap arm that does not use siphonic action may change direction in a horizontal plane
by up to ____ degrees between the fixture and the vent fitting - Answer-135
The suction pipe from the well to the house should be installed at a/an _______ slope -
Answer-upward
The maximum filling density of any propane container must never exceed ____% of the
water capacity stamped on the container - Answer-42
1. When installing a private water supply system, a qualified __________ should
complete all wiring terminations - Answer-electrician
If a wood range is to be converted to a gas range certain adjustments must be made.
One major adjustment is the: - Answer-replacement of manual dampers with barometric
dampers
When an eye is properly formed in a wire rope with the use of a thimble, the eye will
have approximately ______ percent - Answer-80
A fixture drain of the individual fixture that is not piped through one complete storey is
referred to as a: - Answer-fixture drain.
Fixtures that are not part of a wet vent group may connect to the wet vent branch and
the hydraulic load going into the vent does not have to be included in the wet vent -
Answer-False
When calculating the fixture unit load of a residence a two inch main floor drain is
considered to be ____ fixture units. - Answer-2
The common name for sodium carbonate is _________. - Answer-soda ash
When a series of water treatment devices are required for a water treatment system the
water softener is always located _________ in the series. - Answer-Last
Which of the following will have the lowest supply pressure - Answer-manufactured gas
Which table should be consulted to determine cleanout size and spacing - Answer-4.7.2
, Which water systemmay not provide adequate pressure for upper floors of a building -
Answer-forced system
Over sizing a boiler could result in - Answer-the boiler cycling on and offmore frequently
A _________ is a device that replaces the pressure tank and pressure switch on a
private water supply system. - Answer-Mascontrol
If 1/2 inch PEX tubing is used in a radiant heating system the manufacture recommends
a maximum length of _____ feet. - Answer-300
A cast iron boiler will have its heat exchanger constructed of - Answer-cast iron
Over tightening the bolts on a water closet during installation could result in - Answer-
the bowl or tank breaking from stress
Which of the following best describes a dual check valve backflow preventer. - Answer-
used when a hazard is minor in a residential application
The safety device built into an acetylene cylinder is - Answer-a fusible link
Gas room heaters installed in hallways in homes for the elderly should? - Answer-must
be vented type
A double tee wye can be used for connection of two back outlet water closets in a back
to back installation. - Answer-False ( this allows both branches to drain into each other,
need double wye )
How many main categories of check valves are there - Answer-3
The Rule Of Thumb (ROT) vent sizing may only be used to determine the vent sizing f -
Answer-all of the above.
Thermally operated dampers are constructed so that the damper falls closed if the
bimetal fail - Answer-False
Which of the following best describes a relay coil? - Answer-When energized it activates
contacts to either open or close.
Nominally vertical means an angle not more than _______degrees of the vertical? -
Answer-45
If a pipe wrench fails to operate with normal ratchet like action, it is likely the spring is
worn out - Answer-True
QUESTIONS AND ANSWERS
Which of the following best describes an electric water heater? - Answer-one with an
immersion type element
A trap arm that does not use siphonic action may change direction in a horizontal plane
by up to ____ degrees between the fixture and the vent fitting - Answer-135
The suction pipe from the well to the house should be installed at a/an _______ slope -
Answer-upward
The maximum filling density of any propane container must never exceed ____% of the
water capacity stamped on the container - Answer-42
1. When installing a private water supply system, a qualified __________ should
complete all wiring terminations - Answer-electrician
If a wood range is to be converted to a gas range certain adjustments must be made.
One major adjustment is the: - Answer-replacement of manual dampers with barometric
dampers
When an eye is properly formed in a wire rope with the use of a thimble, the eye will
have approximately ______ percent - Answer-80
A fixture drain of the individual fixture that is not piped through one complete storey is
referred to as a: - Answer-fixture drain.
Fixtures that are not part of a wet vent group may connect to the wet vent branch and
the hydraulic load going into the vent does not have to be included in the wet vent -
Answer-False
When calculating the fixture unit load of a residence a two inch main floor drain is
considered to be ____ fixture units. - Answer-2
The common name for sodium carbonate is _________. - Answer-soda ash
When a series of water treatment devices are required for a water treatment system the
water softener is always located _________ in the series. - Answer-Last
Which of the following will have the lowest supply pressure - Answer-manufactured gas
Which table should be consulted to determine cleanout size and spacing - Answer-4.7.2
, Which water systemmay not provide adequate pressure for upper floors of a building -
Answer-forced system
Over sizing a boiler could result in - Answer-the boiler cycling on and offmore frequently
A _________ is a device that replaces the pressure tank and pressure switch on a
private water supply system. - Answer-Mascontrol
If 1/2 inch PEX tubing is used in a radiant heating system the manufacture recommends
a maximum length of _____ feet. - Answer-300
A cast iron boiler will have its heat exchanger constructed of - Answer-cast iron
Over tightening the bolts on a water closet during installation could result in - Answer-
the bowl or tank breaking from stress
Which of the following best describes a dual check valve backflow preventer. - Answer-
used when a hazard is minor in a residential application
The safety device built into an acetylene cylinder is - Answer-a fusible link
Gas room heaters installed in hallways in homes for the elderly should? - Answer-must
be vented type
A double tee wye can be used for connection of two back outlet water closets in a back
to back installation. - Answer-False ( this allows both branches to drain into each other,
need double wye )
How many main categories of check valves are there - Answer-3
The Rule Of Thumb (ROT) vent sizing may only be used to determine the vent sizing f -
Answer-all of the above.
Thermally operated dampers are constructed so that the damper falls closed if the
bimetal fail - Answer-False
Which of the following best describes a relay coil? - Answer-When energized it activates
contacts to either open or close.
Nominally vertical means an angle not more than _______degrees of the vertical? -
Answer-45
If a pipe wrench fails to operate with normal ratchet like action, it is likely the spring is
worn out - Answer-True
