4TH YR PLUMBING EXAM QUESTIONS
AND ANSWERS 2026
What is used when lowering a pump into a well? - ANSWERSChainfall+Tripod
According to the National plumbing code of Canada, what is the maximum
pressure that a flush valve can be operated under? - ANSWERSMin 15psi max 80psi
What size of outlet tube is required from a flush valve for connection to a urinal ? -
ANSWERS¾''
What size of outlet tube is required from a flush valve for connection to a water
closet? - ANSWERS1-1/2''
What would you to fix the problem of a urinal constantly splashing everywhere? -
ANSWERSAdjust the control stop
What is the suggested minimum size of concrete anchor to use for floor-Mounted carrier
installation? - ANSWERSThe suggested minimum anchor size for
floor-mounted carriers is ½''
A dishwashing or food preparation sink has what type of overflow? -
ANSWERSStanding(Waste) overflow
Where does an indirectly connected fixture drain terminate? - ANSWERSTermination of
the drain must be above the flood level
rim of a directly connected fixture drain by means of an
air break
What principle is used in the separation of grease from waste water? -
ANSWERSFlotation
What is the only fixture that may be connected either directly or indirectly to a
drainage system? - ANSWERSDrinking Fountain
What is the minimum size of an Air Break? - ANSWERS1''
The reduced pressure principle backflow preventer is used for what type of
protection only? - ANSWERSBack Siphonage and Back pressure
What is the pressure output of a submersible pump impeller stage? - ANSWERS9 psi
per stage
,An alternative to sodium salt for a brine solution is the use of ________ salt
solution - ANSWERSPotassium
In extreme cases when water has a pH of between 4.0 and 6.9 _____ _____ is
fed using a metering pump - ANSWERSSoda Ash
What material is commonly used in an absorption type filter to attract and hold tastes
and odours? - ANSWERSActivated Carbon
When the rooftop unit receives a call for heat, which part of the system (furnace) is the
first to activate? - ANSWERSThe Combustion Fan Or (DSI sequence)
Thermocouples, and thermopiles are examples of what? - ANSWERSSafeties/
Safeguards
If you are called upon to troubleshoot a gas fired furnace, your first step would be? -
ANSWERSA voltmeter check at the furnace to verify the proper supply
voltage
What is, in order, the Simplified coaching method ? - ANSWERS- Plan
- Tell
- Show
- Do
Why is it important to obtain a Red seal endorsement ? - ANSWERSThe Red Seal is
the industry-Accepted standard for
excellence in a trade
One tonne of Refrigeration (Cooling) is equal to ? - ANSWERS12,000 BTU/hr
What type of well is most susceptible to contamination? - ANSWERSA Dugout
What is the best way to define turbidity? - ANSWERSSuspended biological, inorganic
and organic particles
in water that may be a sufficient amount to make the water
seem cloudy.
What in a plumbing system must be identified? - ANSWERSNon-Potable water
Where is the elevator sump located? - ANSWERSOutside the elevator pit
Make up- air units are normally interlocked with specific equipment. What is it
that they are interlocked with? - ANSWERSExhaust Fan Motors and Fire detection
systems
What is the recommended limit for iron in a water supply ? - ANSWERS0.3mg/L
, The recommended limit for sodium in a water supply for people suffering from
hypertension or heart disease is? - ANSWERS20mg/l
Pressure tanks should be sized to prevent the pump from cycling no more than ___
times per hour? - ANSWERS25 times
The voltage supplied to a circuit is 24 volts. What is the resistance if the
amperage draw of the circuit is 80 ohms? - ANSWERS0.3 Amps
What is the ideal pressure differential between the cut- in and cut out , pressure settings
on a pressure tank? - ANSWERS20 PSI
When placing an impoundment box over a spring to provide for water collection, how is
the spring opening prepared? - ANSWERSWith as little disturbance as possible to the
opening
A twin tank water softener will house the brine in one tank and the other tank will house
the? - ANSWERSZeolite
How much water is needed per person on a daily basis? - ANSWERS60 U.S gal
(230liters)
In a heating thermostat, the anticipator has a _________ connection with the
contacts? - ANSWERSSeries
What is well development? - ANSWERSThe cleaning of an aquifier by a drill rig to
ensure the
well water is as clean as possible .
What type of burner does a domestic hot water tank utilize? - ANSWERSUpshot
The pilot flame should envelope the tip of the thermopile? - ANSWERS3/8" - 1/2"
The Fan control switch is connected in _______ with the motor - ANSWERSseries
The part of a safety system that physically causes the valve to close is? -
ANSWERSThe Power Unit
What is the name of the backup safety control designed to shut off the burner if the
temperature of the water in the heater exceeds 200 deg F? - ANSWERSECO (energy
cut off)
What term describes a furnace that starts and stops frequently due to a lack of air
movement through the heat exchanger? - ANSWERSHigh limit cycling
AND ANSWERS 2026
What is used when lowering a pump into a well? - ANSWERSChainfall+Tripod
According to the National plumbing code of Canada, what is the maximum
pressure that a flush valve can be operated under? - ANSWERSMin 15psi max 80psi
What size of outlet tube is required from a flush valve for connection to a urinal ? -
ANSWERS¾''
What size of outlet tube is required from a flush valve for connection to a water
closet? - ANSWERS1-1/2''
What would you to fix the problem of a urinal constantly splashing everywhere? -
ANSWERSAdjust the control stop
What is the suggested minimum size of concrete anchor to use for floor-Mounted carrier
installation? - ANSWERSThe suggested minimum anchor size for
floor-mounted carriers is ½''
A dishwashing or food preparation sink has what type of overflow? -
ANSWERSStanding(Waste) overflow
Where does an indirectly connected fixture drain terminate? - ANSWERSTermination of
the drain must be above the flood level
rim of a directly connected fixture drain by means of an
air break
What principle is used in the separation of grease from waste water? -
ANSWERSFlotation
What is the only fixture that may be connected either directly or indirectly to a
drainage system? - ANSWERSDrinking Fountain
What is the minimum size of an Air Break? - ANSWERS1''
The reduced pressure principle backflow preventer is used for what type of
protection only? - ANSWERSBack Siphonage and Back pressure
What is the pressure output of a submersible pump impeller stage? - ANSWERS9 psi
per stage
,An alternative to sodium salt for a brine solution is the use of ________ salt
solution - ANSWERSPotassium
In extreme cases when water has a pH of between 4.0 and 6.9 _____ _____ is
fed using a metering pump - ANSWERSSoda Ash
What material is commonly used in an absorption type filter to attract and hold tastes
and odours? - ANSWERSActivated Carbon
When the rooftop unit receives a call for heat, which part of the system (furnace) is the
first to activate? - ANSWERSThe Combustion Fan Or (DSI sequence)
Thermocouples, and thermopiles are examples of what? - ANSWERSSafeties/
Safeguards
If you are called upon to troubleshoot a gas fired furnace, your first step would be? -
ANSWERSA voltmeter check at the furnace to verify the proper supply
voltage
What is, in order, the Simplified coaching method ? - ANSWERS- Plan
- Tell
- Show
- Do
Why is it important to obtain a Red seal endorsement ? - ANSWERSThe Red Seal is
the industry-Accepted standard for
excellence in a trade
One tonne of Refrigeration (Cooling) is equal to ? - ANSWERS12,000 BTU/hr
What type of well is most susceptible to contamination? - ANSWERSA Dugout
What is the best way to define turbidity? - ANSWERSSuspended biological, inorganic
and organic particles
in water that may be a sufficient amount to make the water
seem cloudy.
What in a plumbing system must be identified? - ANSWERSNon-Potable water
Where is the elevator sump located? - ANSWERSOutside the elevator pit
Make up- air units are normally interlocked with specific equipment. What is it
that they are interlocked with? - ANSWERSExhaust Fan Motors and Fire detection
systems
What is the recommended limit for iron in a water supply ? - ANSWERS0.3mg/L
, The recommended limit for sodium in a water supply for people suffering from
hypertension or heart disease is? - ANSWERS20mg/l
Pressure tanks should be sized to prevent the pump from cycling no more than ___
times per hour? - ANSWERS25 times
The voltage supplied to a circuit is 24 volts. What is the resistance if the
amperage draw of the circuit is 80 ohms? - ANSWERS0.3 Amps
What is the ideal pressure differential between the cut- in and cut out , pressure settings
on a pressure tank? - ANSWERS20 PSI
When placing an impoundment box over a spring to provide for water collection, how is
the spring opening prepared? - ANSWERSWith as little disturbance as possible to the
opening
A twin tank water softener will house the brine in one tank and the other tank will house
the? - ANSWERSZeolite
How much water is needed per person on a daily basis? - ANSWERS60 U.S gal
(230liters)
In a heating thermostat, the anticipator has a _________ connection with the
contacts? - ANSWERSSeries
What is well development? - ANSWERSThe cleaning of an aquifier by a drill rig to
ensure the
well water is as clean as possible .
What type of burner does a domestic hot water tank utilize? - ANSWERSUpshot
The pilot flame should envelope the tip of the thermopile? - ANSWERS3/8" - 1/2"
The Fan control switch is connected in _______ with the motor - ANSWERSseries
The part of a safety system that physically causes the valve to close is? -
ANSWERSThe Power Unit
What is the name of the backup safety control designed to shut off the burner if the
temperature of the water in the heater exceeds 200 deg F? - ANSWERSECO (energy
cut off)
What term describes a furnace that starts and stops frequently due to a lack of air
movement through the heat exchanger? - ANSWERSHigh limit cycling
