Plumbing Exam
What is the maximum practical lift of a shallow well jet pump? a. 25ft b. 21ft c. 32ft d. 27ft
A
What is the maximum vertical fall of a water closet trap arm? a. 1m b. 4m c . 6m d. 100m
A
What is the minimum depth of cold caulking compound required for a 150 mm cast iron hub and spigot joint in an underground drainage system? a. 25mm b. 15mm c. 120mm d. 40mm
A
Which backflow preventer is not a testable device? a. PVB b. DCAP c. RP d. DCVA
B
A toilet seat used in a public washroom must be? a. plastic non-permeable type b. round type c. elongated open front type d. cover-less type
C
Which chemical is approved for disinfecting surface water used as a potable supply? a. Sodium carbonate. b. Potassium permanganate. c. Sodium hypchlorite. d. Potassium chloride.
C
Which device in a water tube boiler will direct the air to an expansion tank connection? a. Centrifugal air scoop. b. Automatic air vent. c. Bourdon tube. d. Tank fitting.
C
Which is not a hot water heating piping system? a. series loop b. two pipe direct return c. one pipe gravity return d. two pipe reverse return
C
A circuit vented branch with a horizontal offset that uses two 45o fittings will require? a. additional circuit vent b. not permitted c. two relief vents d. increase one pipe size
A
A horizontal cylindrical tank measuring 60cm in diameter and 150cm in length is partially filled with water to a height of 48cm. Find the volume of water? a. 364L b. 362L c. 366L d. 370L
A
A pipe that connects at its downstream end to two or more vent pipes and at its upper end to a vent stack or stack vent is a? a. branch vent b. common vent c. header d. circuit vent
A
A plumbing branch with 18 Fixture units (including 3 water closets) is discharging into a stack. What is the minimum size and name of the stack downstream of this connection? a. 4" soil stack. b. 4" waste stack. c. 3" soil stack. d. 3" waste stack.
A
A pressure reducing valve must be installed if the water service pressure is above? a. 80 psi (550 Kpa) b. 65 psi (450 Kpa) c. 100 psi (690 Kpa) d. 50 psi (344 Kpa)
A
A water closet bowl has a slow and lazy flush, but is receiving enough water and the drain and vent are clear. What could be done to correct the problem? a. Clean out the under rim drillings. b. Change the flush ball or flapper. c. Install a larger water line. d. Open the supply valve fully.
A
After the inspection of a hot water heating system shows that the system pressure is in excess of the designed operating pressure. Which device will cause this problem? a. Water-feed valve. b. Outdoor compensator. c. Pressure relief valve. d. Circulator.
A
Asbestos cement pipe installed below a 60 mm thick concrete floor must be at least how deep? a. 600m b. 400m c. 550m d. 200m
A
Confined spaces are hazardous environments because they usually have? a. restricted access and egress b. flood hazards c.limited room for maneuverability d. explosive atmospheres
A
Determine the amount of expansion that will occur when a 15m ABS pipe has a temperature change of 40oC? a. 54mm b. 56mm c. 48mm d. 40mm
A
If four shower heads are installed along a wall, what would the minimum measurement be between the two outermost heads? a. 2.25m b. 1100mm c. 850mm d. 1.9m
A
Medical gas piping is most often joined by? a. silver braze b. compression joints c. lead free solder d. flared joints
A
Six equally spaced lav's are to be installed along a wall that is 530 cm long and will be vented with dual vents. Determine the center to center distance between vents if the fixtures are each 51 cm wide? a. 166cm b. 155cm c. 178cm d. 144cm
A
The absorption rate of a septic field is determined by? a. percolation test b. water table c. linear feet of leech field d. soil analysis
A
What is the corrective action necessary to repair a diaphragm type flush valve serving a commercial WC that runs continuously? a. Clean out the diaphragm orifice. b. Reseat the dislodged diaphragm. c. Turn down the control stop. d. Replace the vacuum breaker.
A
What is the maximum horizontal offset permitted in a 3" soil or waste stack that is serving as a wet vent? a. 2.5m b. 1.6m c. 2.4m d. 1.6m
A
What is the minimum length of a trap arm? a. 2 pipe diameters b. 10in c. 14in d. No min
A
What must be considered when installing the drainage piping for a wall hung urinal? a. The location of the cleanout above the fixture flood level rim. b. The installation of a vacuum breaker backflow preventer. c. The maximum temperature of waste entering the drainage system. d. The type of piping material used for the fixture drain and vent piping above the flood level rim.
A
What must be done prior to connecting the dishwasher waste line to a garbage grinder attached to a kitchen sink? a. Remove the garbage grinder knock out plug. b. Install a vacuum breaker on the cold water line. c. Install the garbage grinder downstream of the fixture trap. d. Increase the continuous waste one pipe size.
A
What piping procedure will assist in the removal of air from a hydronic heating system? a. Grade main piping up in the direction of flow. b. Diaphragm tank to have automatic air vent. c. System mains to use concentric fittings. d. Install air vents at all changes of direction.
A
What procedure is used to determine if additional PPE is required for a specific task on a jobsite? a. Complete a hazard assessment. b. Observe what other workers are wearing. c. Request information at next tool box meeting. d. Ask the site foreman.
A
What protective plumbing connection must a commercial kitchen combi- oven use? a. Indirect waste connection to drainage system. b. Air gap connection on waste line c. Atmospheric vacuum breaker on hot and cold water supply. d. Exhaust vent to kitchen canopy with proving switch
A
What steps are followed to join bell and spigot plastic pipe in a drainage system? a. Cut pipe square, ream inside and outside surfaces of pipe, lubricate outside of pipe and inside of fitting and push pipe together using a push bar or shovel. b. Cut pipe square, lubricate outside of pipe and inside of fitting and push pipe together using a push bar or shovel. c. Cut pipe square apply solvent and primer to outside of pipe and inside of fitting and push pipe together using a push bar or shovel d. Cut pipe square, ream inside and outside surfaces of pipe, apply solvent and primer to outside of pipe and inside of fitting and push pipe together using a push bar or shovel.
A
When installing 6 shower drains in a locker room, which piping arrangement would be most economical? a. A running trap with an individual vent. b. A running trap with a relief vent. c. Individual traps with individual vents. d. Individual traps with a circuit and relief vent.
A
When installing a cultured marble plumbing fixture, what is the manufacturers' recommendation for installation of the patented overflow (PO)? a. Use silicon on the fixture. b. Apply plumbers grease to threaded parts. c. Apply pipe joint lubricant to threaded parts. d. Use plumber's putty.
A
When installing glass piping; if one end needs to be field cut, the ends should be joined? a. bead to plain b. bead to hub c. plain to plain d. bead to bead
A
Where should you locate a fin tube radiator within a room? under a window a.under a window b.doesn't matter c.where space permits d.homeowner preference
A
Which manufacturing method produces the strongest pipe? a. extruded b. butt weld c. lap weld d. spiral weld
A
Which procedure and weight of tube would ensure a continuous 90 degree bend without crimping the tube? a. Use a lever style tube bender and type L copper tube.b. Hand bending using a minimum of type M copper tube. c. Swedge using a minimum of type L copper tube. d. Use an external spring bender and type M copper tube.
A
While watching the pressure gauge as the pump is running, which procedure is used to get the best pumping rate from a two pipe convertible deep well jet system? a. Throttle the pump discharge control valve. b. Adjust the range nut with the pump running. c. Adjust the differential nut with the pump running. d. Open the pump discharge control valve fully.
A
A 3⁄4" cold water branch with a developed length of 6.5m could supply how many public use showers? a. 3 b. 4 c. 1 d. 5
B
A 4" cast iron pipe with 1" insulation is to pass through a wall. How large a diameter hole is required to be cut? a. 6in b. 6.5in c. 7in d. 7.5in
B
A branch with 34 fixture units discharges into a sewage sump. What is the minimum size vent required for the sump? a. 11⁄4 b. 3 c. 31⁄2 d. 21⁄4
B
A building's roof measuring 90m by 50m would require how many flow controlled roof drains? a. 4 b. 6 c. 7 d. 10
B
A cross fitting may not be used in a DWV system except to connect? a. branches that receive clear water waste b. four vents c. fixture drains of three compartment sinks d. back to back fixtures
B
A four wire zone valve is wired to? a. transformer, hi limit, motor, circulator b. thermostat, transformer, end switches c. thermostat, transformer, hi limit, motor d. thermostat, transformer
B
A gear pump is a positive displacement pump and must be installed with? a. pressure switch b. pressure relief valve c. pressure reducing valve d. pressure tank
B
A laboratory sink that receives bio-hazardous waste must be installed with? a. Interceptor for organic waste b. cleanout above the flood level rim c. backwater valve d. check valve
B
A piece of baseboard heating element produces 350 BTU's /hr/ft at 180°F. How many feet of element would be installed to handle a heat loss of 4900 BTU's on a 30 foot long wall? a. 10' b. 14' c. 28' d. 32'
B
A pressure switch is set for 20 psi cut/in and 40 psi cut/out. What is the recommended air pressure on the diaphragm tank for best system performance? a. A maximum of 40 psi. b. 3-5 psi below cut in pressure. c. A minimum of 20 psi. d. 3-5 psi below cut out pressure.
B
A private water supplied cistern is fitted with a 3⁄4" make-up water pipe supplied by a municipal system. What size air gap would be required? a. 1⁄4 b. 11⁄2 c. 2 d. 21⁄2
B
A single family dwelling has water table problems and periodic flooding in the basement. A weeping tile system is recommended. What piping procedure is used to connect the weeping tile to the sanitary building drain? a. Connect the weeping tile through a normally closed backwater valve. b. Connect the weeping tile through a trapped backwater valve. c. Connect the weeping tile directly to the sanitary building drain. d. Connect the weeping tile with a trap and normally open backwater valve.
B
A well with a water tight casing requires a minimum standoff distance from a septic system of? a.10m b.15m c. 5m d.25m
B
Bell and spigot cast iron is installed with? a. doesn't matter b. bell upstream c. spigot upstream d. bell downstream
B
Copper tube permitted for underground water distribution? a. type L hard b. type K soft c. DWV d. type M soft
B
Horizontally run 3⁄4" type M copper pipe must be supported every? a.1.5m b.2.5m c.3.5m d. 0.5m
B
The discharge from a sump pump shall have the following fittings installed in order, in the direction of flow? a. check valve, shut-off valve, union b. union, check valve, shut-off valve c. check valve, union, shut-off valve d. shut-off, coupling, check valve
B
The discharge piping from a service water heater's temperature and pressure relief valve must discharge within this amount of a floor drain or suitable area? a. 200mm b. 300mm c. 400mm d. 500mm
B
The minimum size for mobile home service connections are? a. 4" sewer, 1" water b. 4" sewer, 3⁄4" water c. 3" sewer, 1⁄2" water d. 3" sewer, 3⁄4" water
B
The minimum size for vents serving an oil interceptor are? a. 1 b. 11⁄4 c. 3 d. 4
B
This type of trap is not permitted in a drainage system? a. S trap standard b. bell trap c. P trap d. drum trap
B
Water that has a dissolved mineral content of >181 mg/L would be deemed? a. hard b. very hard c. soft d. moderately hard
B
What information is considered to determine the minimum pipe size of a continuous vent? a. The size of the largest trap served and total number of fixture units. b. The size of the largest trap served, length of vent and number of fixture units. c. The length of the vent, number of fixture units and grade on piping. d. The size of the largest trap served, length of vent, fixture units and grade on piping.
B
What is the approximate centre line rough-in dimension of a floor flange serving a standard water closet?a. 300 mm (12 in.) measured from the finished floor.b. 300 mm (12 in.) measured from the finished wall. c. 300 mm (12 in.) measured from the rough wall. d. 300 mm (12 in.) measured from the rough floor.
B
What regular maintenance is required on a testable backflow preventer to insure safe operation? a. Service man tests the device every second year. b. Certified specialist tests the device annually. c. Property owner tests the device every other year. d. Journeyman plumber tests the device annually.
B
When determining the location to install a condensing boiler what must be considered? a. central to heating units b. near a floor drain. c.homeowner's preference d. existing vent location
B
Where is the jet located in a deep well? a. below the foot valve b. above the foot valve c. top of the well d. at the pump
B
Which device would be required on the water supply connecting to the bottom of a commercial hot water heater? a. Temperature and pressure relief within the top 150 mm (6 in.) of the tank. b. Vacuum relief valve located at least 6" above the tank. c. Atmospheric vacuum breaker within the top 150 mm (6 in.) of the tank. d. Check valve located 6" before tank if plastic pipe is used.
B
Which joining procedure is used for plastic pipe on a natural gas service? a. Threading. b. Thermal fusion. c. Solvent welding. d. Brazing.
B
Which procedure will correct the occasional discharge from a reduced pressure principle backflow preventer when the water pressure fluctuates? a. Install a swing check valve downstream of the RP. b. Install a swing check valve upstream of the RP. c. Put in a stronger check valve spring upstream of the RP. d. Restrict the water flow to the RP by using a globe valve.
B
A twin tank water softener will house the brine in one tank and the other tank will house the? a. green sand b. activated carbon c. zeolite d. soda ash
C
An interceptor may act as a trap for a fixture provided that? a. it is located within 8' of the fixture b. vent is increased one size c. it has a 38mm water seal d. all of the above
C
Dielectric unions are used to? a. connect plastic to copper pipe b. isolate metallic piping c. prevent corrosion d. ground metallic pipe
C
How is the branch piping on a pneumatic system installed? A. Graded toward the compressor. B. Level from the main to the outlet. C. Graded from the main to the outlet. D. Level from the main to the first drop.
C
Length is not a consideration when sizing this vent? a. header b. circuit vent c. relief vent d. stack ven
C
The ideal location for a circulator pump installed in a hot water heating system in? a. on the supply after the zone valve b. on the supply before the expansion tank c. on the supply after the expansion tank d. on the return close to the boiler
C
Underground piping installed in a dug trench should be covered with appropriate backfill to a height of? a. 200mm b. 250mm c. 300mm d. 350mm
C
Using a builder's level the backsight reading at the benchmark is 1.450 m and the foresight reading at the destination point is 1.750 m. What is the elevation of the destination point if the benchmark elevation is 100.00 m? a. 101.750 m b. 99.750 m c. 99.700 m d. 101.450 m
C
What is the minimum ground cover for underground gas piping? a. 10 b. 14 c. 16 d. 20
C
What is the minimum size of trap for a commercial dishwasher? a. 1 b. 11⁄2 c. 2 d. 21⁄2
C
When does a spring-loaded inline trap primer deliver a spurt of water to the trap it is serving? a. A flush valve for a urinal or water closet operates. b. A flush tank for a urinal discharges. c. The faucet through which it is supplied is opened and closed. d. The solenoid valve on the supply is opened by a timer.
C
Which of the following fixtures may not be indirectly connected to a drainage system? a. drinking fountain b. water softener backwash c. commercial dishwasher d. sterilizer
C
You are required to use a 20 foot ladder placed up against a building that is 40' high. At what vertical distance from the base of the building must the ladder be? a. 3ft b. 6ft c. 5ft d. 8ft
C
A customer complains that their gas fired hot water heater no longer produces an adequate amount of hot water. What component of the hot water heater should be replaced? a. Anode rod. b. Mixing valve. c. Thermocouple. d. Dip tube.
D
A flat roof measuring 20m by 26m with a horizontal wall on one side extended up 6m by 20m. Size the circular rain water leader if the local 15 minute rain fall intensity is 24mm? a. 2 b. 7 c. 9 d. 6
D
A hydronic heating and cooling convector share the same coil. How many heating/cooling pipes will enter the convector? a. One for heating and two for cooling. b. Two for heating and one for cooling. c. One for heating and one for cooling. d. Two for both the heating and cooling.
D
Class "A" fire extinguishers are used on and contain? a. Metal, CO2 b. Electrical components, foam c. flammable liquids, CO2 d. Combustible materials, Water
D
How would you increase the length of flush on a flushometer? a. turn regulating screw counter clockwise b. remove vacuum breaker c. throttle the stop valved. d. turn regulating screw clockwise
D
Scaffolding erected this much feet above the ground must have guard rails? a. 3ft b. 5ft c. 7ft d. 10ft
D
This is not an approved method for joining cast iron waste pipe? a. mechanical joint b. caulked joint c. compression joint d. welded joint
D
What criteria must be met to insure proper operation of a water meter when installed? a. The size of water meter is determined by the water service size. b. The fitting connection on the water meter inlet must be electrically conductive. c. The water meter is installed in a vertical position. d. The water meter is installed in a horizontal position.
D
What is done to prevent freezing of an effluent line leaving the septic tank? a. Use more hot water in the building. b. Install a frost box where more than 1.2m of cover. c. Increase the effluent line one pipe size. d. Lower the effluent line below frost level.
D
What is the definition of a Class B fire? a. Fires that involve energized electrical equipment, such as wiring, controls, motors or appliances. b. Fires that involve combustible metals such as magnesium and sodium. c. Fires involving common combustibles such as wood, paper, cloth, rubber and trash. d. Fires involving flammable liquids, gases, gasoline and synthetic or oil- based products.
D
What piping procedure is required for the venting of an oil interceptor? a. 2 vent pipes terminated less than 2m above ground. b. 1 vent pipe terminated less than 300mm above the other. c. 2 vent pipes connected to the interceptor at opposite ends. d. 2 vent pipes connected to same side of the interceptor.
D
What will happen to the private sewage disposal system if the septic tank is not maintained and emptied on a regular basis? a. Amount of effluent flushed will increase. b. Gases in the tank will enter the venting system. c. Anaerobic bacteria will cease to function. d. Solids will carry over and damage the field.
D
When a well pump turns on as soon as a faucet is used, the most likely problem is? a. defective pressure switch b. foot valve not holding c. pump impeller is worn out d. water logged pressure tank
D
When using oxy-fuel cutting and welding equipment, a flashback arrestor protects the operator from? a. bright flashes b. electrical shock c. material blowback d. flame traveling into the hoses
D
Where is a flow switch installed on a hydronic heating system? a. Adjacent to the aquastat on the boiler. b. On the injection pump discharge line. c. On the return main where it drops to the boiler. d. Above the safe water line on the boiler.
D
Where would the chlorinator be installed when used with a sand filter, water softener and activated carbon filter? a. Between the activated carbon filter and the water softener. b. Between the sand filter and the activated carbon filter. c. After the water softener and the activated carbon filter d. Before the sand filter, activated carbon filter and softener.
D
Which identification systems are used to prevent improper connections for medical gas outlets? a. Diameter-Index Safety System and Pin-Insert Safety System. b. Double-Insert Safety System and Pin-Index Safety System. c. Diameter-Index Safety System and Thread-Index Safety System. d. Diameter-Index Safety System and Pin-Index Safety System.
D
Which joining procedure is only approved for water service piping below ground and outside of the building? a. Brazing the joint. b. Soldering the joint. c. Flaring the pipe. d. Compression fittings.
D
Which procedure is recommended to control the corrosion within a hydronic system? a. Add fresh water on a regular basis. b. Chemically maintain a soft water condition. c. Maintain a 50% ethylene glycol solution. d. Chemically maintain an alkaline pH value.
D
