Fourth Year - Plumbing Interprovincial Practice Exam 2

Question 1

What sling configuration would be rated with the most capacity for a lifting procedure?

A. Single verticle leg.

B. Choker with single vertical leg.

C. Basket sling with 2 vertical legs.

D. Basket sling with 2 inclined vertical legs.

Answer 1

C. Basket sling with 2 vertical legs.

Question 2

Referring to the figure below, what is the size of the gas supply line for the steamer (item #195)?

A. 13 mm.

B. 19 mm.

C. 25 mm.

D. 32 mm.

Answer 2

B. 19 mm.

Question 3

Referring to the figure below, what is the size of the cold water supply piping required for the stacking oven (item #258)?

A. 6 mm.

B. 13 mm.

C. 19 mm.

D. 25 mm.

Answer 3

A. 6 mm.

Question 4

Referring to the figure below, how many ball valves must be ordered to assemble the sytem shown?

A. 10.

B. 12.

C. 13.

D. 14.

Answer 4

B. 12.

Question 5

A 4” diameter stainless steel pipe is 26.5 m (86.9 feet) in length and requires hangers to be placed at 1.6 m (5.25 feet) intervals. How many hangers are required to support the pipe with hangers at both ends of the run?

A. 16.

B. 17.

C. 18.

D. 19.

Answer 5

C. 18.

Question 6

A 6” NPS (150 mm) cast iron soil pipe with a 1/4” (6 mm) wall thickness require a sleeve. What is the minimum inside diameter of the sleeve required? (No room is required for annular space)

A. 150 mm (Metric) 6” (Imperial).

B. 156 mm (Metric) 6 1/4” (Imperial).

C. 162 mm (Metric) 6 1/2” (Imperial).

D. 212 mm (Metric) 8 1/2” (Imperial).

Answer 6

C. 162 mm (Metric) 6 1/2” (Imperial).

Question 7

What is the minimum ground cover for underground gas piping?

A. 300 mm (Metric) 12” (Imperial).

B. 375 mm (Metric) 15” (Imperial).

C. 450 mm (Metric) 18” (Imperial).

D. 600 mm (Metric) 24” (Imperial).

Answer 7

B. 375 mm (Metric) 15” (Imperial).

Question 8

What sequence of plumbing procedures applies before a plumbing system is covered?

A. Install, Test, Inspect and Obtain a permit.

B. Obtain a permit, Install, Test and Inspect.

C. Install, Test, Obtain a permit and Inspect.

D. Obtain a permit, Install, Inspect and Test.

Answer 8

B. Obtain a permit, Install, Test and Inspect.

Question 9

A safety line should be attached to what part of the safety harness?

A. The back.

B. The front.

C. The chest.

D. Both the front and the back.

Answer 9

A. The back.

Question 10

What piping installing would require a “fire donut”?

A. DWV coppper passing through a fire rated floor.

B. Cast iron passing through fire rated wall[][][][][][][]

C. ABS piping passing through a fire rated celing[]]

D. Ductile iron passing through a fire rated floor[][]]

Answer 10

C. ABS piping passing through a fire rated celing.

Question 11

A plumber must install a one inch black iron pipe in a small space. Which of the following tools would be best suited for the job?

A. Offset wrench.

B. Compound wrench.

C. Chain wrench[][][][][]]

D. Angle wrench[][][][][]

Answer 11

C. Chain wrench.

Question 12

Which tool would be used to add a chrome plated extension to a tail piece?

A. Chain wrench.

B. Basin wrench[]

C. Strap wrench[][]

D. Crescent wrench.

Answer 12

C. Strap wrench.

Question 13

Which procedure would correct a tube cutter that is spiraling along copper pipe?

A. Change the cutter wheel to a larger size.

B. Tighten rollers and cutter wheel pins[][][]]

C. Increase the cutter wheel tension when cutting.

D. Rotate only in a counter clockwise motion[][][][][]

Answer 13

B. Tighten rollers and cutter wheel pins.

Question 14

What is the purpose of the notched wheel rollers on a copper tube cutter?

A. Allow room for the pipe to displace when cut.

B. Make a space for cutting materials to collect[]

C. Flex slightly and prevent the crushing of the tube.

D. To permit the cutting of tubing close to a flare[][][]]

Answer 14

D. To permit the cutting of tubing close to a flare.

Question 15

Which procedure and weight of tube would ensure a continuous 90 degree bend without crimping the tube?

A. Use an external spring bender and type M copper tube.

B. Use a lever style tube bender and type L copper tube[][]

C. Hand bending using a minimum of type M copper tube[]

D. Swedge using a minimum of type L copper tube[][][][][][]]

Answer 15

B. Use a lever style tube bender and type L copper tube.

Question 16

Using the correct heating process, what would cause the solder to bead up and fall off the copper tube and fitting instead of penetrating the joint during the soldering process?

A. The inside of the pipe was not cleared.

B. There was no flux applied to tube and fitting.

C. There was not enough heat applied[][][][][][][][]

D. The solder has too low of a melting point[][][]

Answer 16

B. There was no flux applied to tube and fitting.

Question 17

A length of 3 inch ABS pipe is to be installed between two 45° elbows. The center to center dimension between the 45° elbows is 55 1/2” and the fitting allowance for a 45° elbow is 15/16”. What is the cut length of the ABS pipe?

A. 52 1/2”.

B. 53 5/8”.

C. 54 3/16”.

D. 55 1/2”.[]

Answer 17

B. 53 5/8”.

Question 18

What steps are followed to join bell and spigot plastic pipe in a drainage system?

Answer 18

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.

Question 19

What is the order of operation for installing a compression fitting?

A. Cut, Ream, Compression nut.

B. Cut, Ferrule, Ream, Compression nut.

C. Cut, Ream, Compression nut, Ferrule.

D. Ream, Ferrule, Cut, Compression nut.

Answer 19

C. Cut, Ream, Compression nut, Ferrule.

Question 20

Referring to the figure below, what is the cut length of pipe #5 if the center to center dimension is 940 mm?

A. 840 mm.

B. 864 mm.

C. 878 mm.

D. 902 mm.

Answer 20

C. 878 mm.

Question 21

Referring to the figure below, which marking indicates the material designation for this tee?

A. A.

B. B.

C. C.

D. D.

Answer 21

B. B.

Question 22

When laying out a gasket for an 8 hole flange what is the angle used to determine the bolt hole spacing?

A. 22 1/2°.

B. 30°[][][]]

C. 45°[][][]]

D. 90°[][][]

Answer 22

C. 45°.

Question 23

What is the minimum depth of cold caulking compound required for a 150 mm (6 inch) cast iron hub and spigot joint in an underground drainage system?

A. 20 mm.

B. 25 mm.

C. 38 mm.

D. 150 mm.

Answer 23

B. 25 mm.

Question 24

What is the process for assembling a field cut piece of glass pipe to a factory beaded piece of glass pipe?

Answer 24

Remove roughness from outside of the field cut and use manufacturer’s coupling designed for this application.

Question 25

Where is an 8 inch 1500 non-pressure asbestos cement sewar pipe allowed for installation?

A. Above ground inside a building.

B. Above ground in a venting system.

C. Underground in a potable water system.

D. Underground under a building[][][][][][][][][]

Answer 25

D. Underground under a building.

Question 26

How is the base inside a “poured in place” sanitary manhole constructed?

A. Graded from the center of base to walls.

B. Level throughout[][][][][][][][][][][][][][][][][][][][][]]

C. Channeled in direction of flow[][][][][][][][][]]

D. Channeled away from direction of flow[]

Answer 26

C. Channeled in direction of flow.

Question 27

To protect drainage piping in a trench, what is the minimum cover to be placed and tamped?

A. 150 mm above pipe.

B. 300 mm above pipe.

C. 150 mm below finished grade.

D. 300 mm below finished grade.

Answer 27

B. 300 mm above pipe.

Question 28

A 4” building sewar must run 75m from the building to a manhole, at minimum grade. Calculate the total fall on the line.

A. 0.5 m.

B. 0.75 m.

C. 1.0 m[][]

D. 1.5 m[]]

Answer 28

B. 0.75 m.

Question 29

Using a builders 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’s elevation is 100.00 m.

A. 101.450 m.

B. 101.750 m.

C. 99.750 m[]

D. 99.700 m[]

Answer 29

D. 99.700 m.

Question 30

Which table from the National Plumbing Code is used to determine the size of a storm building drain?

A. 2.4.10.9.

B. 2.4.10.6.A.

C. 2.4.10.6.B.

D. 2.4.10.6.C.

Answer 30

A. 2.4.10.9.

Question 31

A combined building sewar has a hydraulic load of 345 fixture units and 9 280 liters of rainwater. What is the minimum size of pipe required for a slope of 1 in 100?

A. 4.

B. 6.

C. 8.

D. 10.

Answer 31

C. 8.

Question 32

What procedure is used to determine a soil’s ability to accept a private sewage disposal system?

A. Sand in jar test.

B. Percolation test.

C. Squirt test[][][][][]

D. Soil saturation test.

Answer 32

B. Percolation test.

Question 33

What is done to prevent freezing of an (pumped) effluent line leaving the septic tank?

A. Lower the effluent line below frost level.

B. Use more hot water in the building[][][][][]

C. Install a forst box where more than 1.2 m of cover.

D. Increase the effluent line one pipe size[][][][][][][][][]]

Answer 33

A. Lower the effluent line below frost level.

Question 34

What is the purpose of installing a screen around an effluent pump in a septic tank?

A. Prevents the pump from plugging.

B. Prevents solids from entering the gravity distribuion.

C. Prevents solids from entering the pressure distribution.

D. Prevents solids from entering the effluent chamber[][][]]

Answer 34

A. Prevents the pump from plugging.

C. Prevents solids from entering the pressure distribution.

Question 35

What device controls the intervals at which effluent is discharged to a gravity fed distribution field?

A. Float switch.

B. Pump control panel.

C. Bell and siphon[][][][]

D. Effluent diverter valve.

Answer 35

C. Bell and siphon.

Question 36

Percolation tests indicate that the soil in the area selected for a disposal field has a percolation rate of 92 minutes per inch. What type of effluent treatement system is required?

A. Gravity effluent disposal system using perforated pipe.

B. Gravity effluent disposal system using chambers[][][][][]]

C. Pressure distribution into a chamber system[][][][][][][][][]]

D. Pressure distribution into a sand bed mound[][][][][][][][]]

Answer 36

D. Pressure distribution into a sand bed mound.

Question 37

A three piece basement plumbing rough-in includes a water closet, bathtub and lavatory. Determine the minimum size of wet vent to be installed?

A. 32 mm.

B. 40 mm.

C. 50 mm.

D. 75 mm.

Answer 37

C. 50 mm.

Question 38

A double compartment kitchen sink is being replaced with a triple compartment kitchen sink. What drainage changes are necessary to complete the installation?

A. Fixture outlet length cannot be less than 1.2 m.

B. Another plumbing trap and vent is required for the extra sink.

C. The fixture trap & fixture drain is to be 1 pipe size larger than largest sink outlet.

D. The garbage grinder must be installed in the middle compartment[][][][][][][][][][][][]

Answer 38

C. The fixture trap & fixture drain is to be 1 pipe size larger than largest sink outlet.

Question 39

What is the minimum size of a trap for a commercial dishwasher?

A. 1 1/4 inch.

B. 1 1/2 inch.

C. 2 inch[][][]

D. 3 inch[][][]

Answer 39

C. 2 inch.

Question 40

When the building drain (BD) is located below the level of the adjoining street, which device is installed inside the building?

A. A backflow preventer on the service.

B. A normally closed backwater valve on the BD.

C. A normally open backwater valve on the BD[][]

D. A normally open backwater valve on the weeping tile.

Answer 40

C. A normally open backwater valve on the BD.

Question 41

When installing 6 shower drains in a locker room, which piping arrangement would be most economical?

A. Individual traps with individual vents.

B. Individual traps with a circuit and relief vent.

C. A running trap with an individual vent[][][][][][]

D. A running trap with a relief vent[][][][][][][][][][][]

Answer 41

C. A running trap with an individual vent.

Question 42

Which piping procedure is necessary to complete and terminate the venting of an oil interceptor?

A. Connect them to the building at the same height.

B. Terminate them outside the building at the same height.

C. Terminate them outside the building at a height difference of at least 300 mm.

D. Tie them together outside the building 300 mm above grade[][][][][][][][][][][][][][][][]

Answer 42

C. Terminate them outside the building at a height difference of at least 300 mm.

Question 43

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 directly to the sanitary building drain.

B. Connect the weeping tile through the normally closed backwater valve.

C. Connect the weeping tile with a trap and normally open backwater valve.

D. Connect the weeping tile through a trapped backwater valve[][][][][][][][][][][]

Answer 43

D. Connect the weeping tile through a trapped backwater valve.

Question 44

A laster level is being used to grade a long run of cast iron pipe. The level is sitting on top of the first piece of cast iron pipe installed. The light beam from the laster level is near the intended target on the wall 100 feet away but unfortunately its showing that it is too low. What should be done to correct this situation?

A. Lower the pipe.

B. Raise the pipe[]

C. Adjust the target.

D. Move the laser[]]

Answer 44

B. Raise the pipe.

Question 45

What piping procedure is required for the venting of an oil interceptor?

A. 2 vent pipes connected to same side of interceptor.

B. 2 vent pipes terminated less than 2 m above ground.

C. 1 vent pipe terminated less than 300 mm above the other.

D. 2 vent pipes connected to the interceptor at opposite ends.

Answer 45

D. 2 vent pipes connected to the interceptor at opposite ends.

Question 46

A plumbing vent serving a typical basement three piece plumbing rough-in has a developed length of 12 meters. What is the name and minimum size of this vent?

A. 1 1/4” continuous vent.

B. 1 1/4” circuit vent[][][][][]

C. 1 1/2” continuous vent.

D. 1 1/2” circuit vent[][][][]]

Answer 46

C. 1 1/2” continuous vent.

Question 47

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. 2” soil or waste stack.

B. 2 1/2” soil or waste stack.

C. 3” soil or waste stack[][]]

D. 4” soil or waste stack[][]

Answer 47

D. 4” soil or waste stack.

Question 48

What is the order of installation, in the direction of flow, for the discharge line from the sewage pump?

A. Connection to the sanitary sewar, Union, Shut-off valve and Check valve.

B. Union, Shut-off valve, Check valve and Connection to the sanitary system.

C. Union, Check valve, Shutoff valve and Connection to the sanitary system[]]

D. Connection to the sanitary sewar, Union, Check valve and Shutoff valve[][]]

Answer 48

C. Union, Check valve, Shutoff valve and Connection to the sanitary system.

Question 49

What is the approximate center line rough-in dimension of a floor flange serving a standard water closet?

A. 300 mm measured from rough floor.

B. 300 mm measured from the finished floor.

C. 300 mm measured from the finished wall.

D. 300 mm measured from the rough wall[]]

Answer 49

C. 300 mm measured from the finished wall.

Question 50

Which plumbing item would be installed immediately downstream of an interceptor?

A. Vent pipe.

B. Enzyme injection point.

C. Cleanout fitting[][][][][][][]]

D. Flow control orifice[][][]]

Answer 50

C. Cleanout fitting.

Question 51

A 4” cast iron storm drainage system is 100 m long and has a hanger on each end. How many hangers are required using the maximum allowable distance between supports?

A. 33.

B. 34.

C. 64.

D. 66.

Answer 51

D. 66.

Question 52

A vertical storm drainage pipe passes through a five storey building. How many floor supports are needed to meet minimum code requirements?

A. 3 clevis hangers.

B. 3 riser clamps[][]]

C. 4 clevis hangers[]

D. 4 riser clamps[][][]

Answer 52

B. 3 riser clamps.

Question 53

A wall hung urinal is to be installed in a health care facility. What must be considered when installing the drainage pipe?

A. The maximum temperature of waste entering the drainage system.

B. The type of piping material used for the fixture drain and vent piping above the flood level rim.

C. The location of the cleanout above the fixture flood level rim[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]

D. The installation of a vacuum breaker backflow preventer[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]

Answer 53

C. The location of the cleanout above the fixture flood level rim.

Question 54

What information is considered to determine the minimum pipe size of a continuous vent?

A. The length of the vent, number of fixture units and grade on piping.

B. The size of the largest trap served and total number of fixture units.

C. The size of the largest trap served, length of vent and number of fixture units.

D. The size of the largest trap served, length of vent, fixture units and grade on piping.

Answer 54

C. The size of the largest trap served, length of vent and number of fixture units.

Question 55

When sizing a water service and distribution system, which variable will have the greatest effect on the available water pressure to a plumbing fixture?

A. The length of the building.

B. The height of the building[]]

C. The total fixture unit load[][]

D. The size of the water service.

Answer 55

B. The height of the building.

Question 56

What additional equipment is required at the building end of a PE (polyethylene) water service suitable for cold water applications?

A. Pressure relief valve with thermal expansion compensator.

B. Pressure reducing valve with valved bypass[][][][][][][][][][][][][]

C. Check valve and diaphram tank on the cold water line[][][][]

D. Testable backflow preventer[][][][][][][][][][][][][][][][][][][][][][][][][][][]]

Answer 56

C. Check valve and diaphram tank on the cold water line.

Question 57

When does a spring loaded inline trap primer deliver a spurt of water to the trap it is serving?

A. A flush tank for a urinal discharges.

B. A flush valve for a urinal or water closet operates.

C. The solenoid valve on the supply is opened by a timer.

D. The faucet through which it is supplied is opened and closed.

Answer 57

D. The faucet through which it is supplied is opened and closed.

Question 58

A water service enters a building at a geodetic elevation of 724.5 m (2377’) with 490 kPa (71 psi) water pressure. What is the water pressure if the water outlet is at an elevation of 729.3 m (2392’).

A. 235 kPa (34 psi).

B. 442 kPa (64 psi).

C. 538 kPa (78 psi).

D. 745 kPa (108 psi).

Answer 58

B. 442 kPa (64 psi).

Question 59

What piping arrangment would ensure that domestic hot water is readily available to a plumbing fixture?

A. Mixing valve piped with hot and cold water.

B. Series piping loop on the water system[][][]]

C. Recirculation line on the water system[][][][]]

D. Parallel piping loop on the water system[][]

Answer 59

C. Recirculation line on the water system.

Question 60

What criteria must be met to insure 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 inlet must be electronically conductive.

C. The water meter is installed in a horizontal position[][][][][][][][][][][][][][][][][][][][][][]

D. The water meter is installed in a vertical position[][][][][][][][][][][][][][][][][][][][][][][][]

Answer 60

C. The water meter is installed in a horizontal position.

Question 61

Which backflow preventer is installed on a boiler using chemical treatment?

A. Dual check with atmospheric port.

B. Double check valve assembly[][][][]

C. Pressure vacuum breaker[][][][][][][][]

D. Reduced pressure principle backflow preventer.

Answer 61

D. Reduced pressure principle backflow preventer.

Question 62

Which device would be required on the water supply connecting to the bottom of a commercial hot water tank?

A. Check valve located 6” before tank if plastic pipe is used.

B. Temperature and pressure relief within the top 150 mm (6”) of the tank.

C. Vacuum relief valve located at least 6” above the tank[][][][][][][][][][][][][][][]

D. Atmospheric vacuum breaker within the top 150 mm (6”) of the tank[][]]

Answer 62

C. Vacuum relief valve located at least 6” above the tank.

Question 63

Which device or method is the most effective for protecting a potable water supply from back siphonage?

A. Air break.

B. Air gap[][]]

C. RP device.

D. DCVA device.

Answer 63

B. Air gap.

Question 64

When chemicals are added to a hydronic heating system, which device or method is used to protect the potable water against backflow?

A. Air gap.

B. DCVA[]]

C. RP device.

D. PVB device.

Answer 64

C. RP device.

Question 65

When installing a Reduced Pressure Principle Backflow Preventer (RP), what is required to complete the piping installation?

A. An air gap fitting on the relief port.

B. A direct waste connection to a floor drain.

C. A pressure guage on the upstream side of the device.

D. An air gap immediately above a floor drain[][][][][][][][][][]]

Answer 65

A. An air gap fitting on the relief port.

Question 66

A private water well has a standing water level at 30 feet below ground level. Which pump system would be best suited for this installation?

A. Convertible jet system with two suction pipes.

B. Submersible pump with foot valve[][][][][][][][][][]]

C. Gear pump in well with pressure relief valve[]]

D. Deep well jet pump with one suction and one drive pipe.

Answer 66

D. Deep well jet pump with one suction and one drive pipe.

Question 67

What is required when installing a deep well jet pump?

A. Check valve is required on the pump discharge.

B. Foot valve is required on the jet suction line[][][][]

C. Relief valve is required with centrifugal jet pumps.

D. Modulating valve is required on the pump suction line.

Answer 67

B. Foot valve is required on the jet suction line.

Question 68

A pressure switch is set for 20 psi cut/in and 40 psi cut/out. What is the recommended air pressure on the diaphram tank for best system performance?

A. A minimum of 20 psi.

B. A minimum of 40 psi.

C. 2-3 psi below cut in pressure.

D. 3 psi below cut out pressure[]

Answer 68

C. 2-3 psi below cut in pressure.

Question 69

Which of the following pump voltages will provide more energy efficiency?

A. 110 line voltage.

B. 120 static voltage.

C. 220 line voltage[]]

D. 240 static voltage.

Answer 69

C. 220 line voltage.

Question 70

While watching the pressure guage 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. Open the pump discharge control valve fully.

B. Throttle the pump discharge control valve[][]]

C. Adjust the range nut with the pump running[]

D. Adjust the differential nut with the pump running.

Answer 70

B. Throttle the pump discharge control valve.

Question 71

Which fixture floor support would be installed on a heavy cast iron service sink?

A. Pressed steel wall bracket.

B. Lavatory chair carrier[][][][][]

C. P-trap standard[][][][][][][][][][]

D. Cast iron floor flange[][][][]]

Answer 71

C. P-trap standard.

Question 72

When setting a wall hung water closet, which installation procedure ensures a water tight seal on the waste connection?

A. Chair carrier is positioned close to the finished wall.

B. Back up nuts and washers are set 1/16” past wall[][][]

C. Adjustable nipple is set for compression of gasket[]]

D. Horn wax seal is positioned and compressed by adjustable nipple.

Answer 72

C. Adjustable nipple is set for compression of gasket.

Question 73

Which procedure is used to lengthen the flush time of a typical diaphram style flushometer valve?

A. Turn the bypass screw counter clockwise.

B. Open the control stop fully[][][][][][][][][][][][][]]

C. Install a new vacuum breaker[][][][][][][][][][][]

D. Turn the flushometer bonnet screw clockwise.

Answer 73

D. Turn the flushometer bonnet screw clockwise.

Question 74

What must be done prior to connecting the dishwasher waste line to a garbage grinder attached to a kitchen sink?

A. Increase the continuous waste one pipe size.

B. Remove the garbage grinder knock out plug.

C. Install a vacuum breaker on the cold water side.

D. Install the garbage grinder downstream of the fixture trap.

Answer 74

B. Remove the garbage grinder knock out plug.

Question 75

What is the hand held shower piping connected to on a roman tub?

A. Pressure balanced control.

B. Thermostatic mixing valve.

C. Diverter valve[][][][][][][][][][][]]

D. Hot/cold mixing valve[][][][]]

Answer 75

C. Diverter valve.

Question 76

When installing a cultured marble plumbing fixture, what is the manufacturer’s recommendation for installation of the patented overflow (PO)?

A. Use plumber’s putty.

B. Use silicon on the fixture.

C. Apply plumber’s grease to threaded parts.

D. Apply pipe joint lubricant to threaded parts.

Answer 76

B. Use silicon on the fixture.

Question 77

A commercial dishwasher has been spec’d for a new restaurant being built. What must be taken into consideration when installing the interceptor being intalled downstream of the dishwasher?

A. The flow rating of the interceptor.

B. The hardness of the water coming from the dishwasher.

C. Copper drainage piping is installed before the interceptor.

D. Copper drainage piping installed within 1.2 meters of the interceptor.

Answer 77

A. The flow rating of the interceptor.

Question 78

What protective plumbing connection must a commercial kitchen combi-oven use?

A. Atmospheric vacuum breaker on hot and cold water supply.

B. Exhaust vent to kitchen canopy with proving switch[][][][][][][][]

C. Indirect waste connection to drainage system[][][][][][][][][][][][][]

D. Air gap connection on waste line[][][][][][][][][][][][][][][][][][][][][][][][]]

Answer 78

C. Indirect waste connection to drainage system.

Question 79

What are the requirements for nuts, washers, bolts and screws for attaching a floor flange and water closet to a floor?

A. Corrosion resistant.

B. Zinc coated steel[][]

C. Nickel plated iron[]]

D. Brass plated steel[]

Answer 79

A. Corrosion resistant.

Question 80

Which chemical is approved for disinfecting surface water used as a potable supply?

A. Sodium hypochlorite.

B. Potassium chloride[][]

C. Sodium carbonate[][]]

D. Potassium permanganate.

Answer 80

A. Sodium hypochlorite.

Question 81

Which water treatment device is used to remove taste and odor found in water supplies?

A. Sand filter.

B. Water softener.

C. Activated carbon filter.

D. Iron filter[][][][][][][][][][][][]]

Answer 81

C. Activated carbon filter.

Question 82

Which piping arrangement must be used when terminating the regeneration line serving a water softener?

A. Directly to the bypass valve around the softener head.

B. Indirectly to approved drainage termination[][][][][][][][][]]

C. Indirectly to a dual check valve on the softener head[]

D. Directly to approved drainage termination[][][][][][][][][][]]

Answer 82

B. Indirectly to approved drainage termination.

Question 83

Where would the chlorinator be installed when used with a sand filter, water softener and activated carbon filter?

A. Between the sand filter and the activated carbon filter.

B. Between the activated carbon filter and the water softener.

C. Before the sand filter, activated carbon filter and softener[]]

D. After the water softener and the activated carbon filter[][][]]

Answer 83

C. Before the sand filter, activated carbon filter and softener.

Question 84

Which piping connection protects the water treatment equipment water supply from sewage contamination?

A. Check valve on back wash line.

B. Air break termination[][][][][][][][][][]

C. Stand pipe off the floor[][][][][][][][]

D. Air gap termination[][][][][][][][][][][]

Answer 84

B. Air break termination.

Question 85

What piping procedure will assist in the removal of air from a hydronic heating system?

A. Install air vents at all changes of direction.

B. Grade main piping up in the direction of flow.

C. Diaphram tank to have automatic air vent[][][]]

D. System mains to use concentric fittings[][][][][]

Answer 85

B. Grade main piping up in the direction of flow.

Question 86

A heating line is installed using steel pipe with the following information:

COE: 0.0000067

Length: 200’[][][]]

Installed@ 55°F[]

Operational @ 180°F

What is the amount of expansion on this heating line?

A. 1”.

B. 2”.

C. 3”.

D. 4”.

Answer 86

B. 2”.

Question 87

Which procedure is recommended to control the corrosion within a hydronic heating system?

A. Chemically maintain an alkaline pH value.

B. Add fresh water on a regular basis[][][][][][]]

C. Chemically maintain a soft water condition.

D. Maintain a 50% ethylene glycol solution[][]]

Answer 87

A. Chemically maintain an alkaline pH value.

Question 88

What must be installed to protect against air locks in a hydronic heating system?

A. Vacuum relief vents at difficult areas to access.

B. Manual air vents on condensate returns[][][][][][]

C. Air scoop on the return water main[][][][][][][][][][]]

D. Auto air vents at all system high points[][][][][][][]

Answer 88

D. Auto air vents at all system high points.

Question 89

What must be considered when positioning a boiler in a mechanical room?

A. Install it on a fire resistant floor surface if it is cast iron.

B. Allow room for access and service[][][][][][][][][][][][][][][][][]]

C. Install it next to the hot water tank if connecting to a gas line.

D. Install it near the common chimney if it is high efficient[][][][][][]]

Answer 89

B. Allow room for access and service.

Question 90

Which hydronic heating boiler control device is used to adjust the boiler water temperature?

A. Pressuretrol.

B. Gas unitrol[]]

C. Aquastat[][][]

D. Gas valve[][]

Answer 90

C. Aquastat.

Question 91

For the most efficient operation, where is the outside sensor of the indoor/outdoor control installed?

A. On a west wall with exposure to the sun.

B. On a north wall just below the soffit[][][][]]

C. In the attic next to the ventilation grill[][][]

D. At least 300 mm away from an outside light.

Answer 91

B. On a north wall just below the soffit.

Question 92

Where is the float switch installed on a hydronic heating system?

A. On the return main where it drops to the boiler.

B. Above the safe water line on the boiler[][][][][][][]]

C. Adjacent to the aquastat on the boiler[][][][][][][][]]

D. On the injection pump discharge line[][][][][][][][][]

Answer 92

D. On the injection pump discharge line.

Question 93

What is the correct installation of a thermal bulb (aquastat proportional controller) on a chilled water system?

A. Install directly into a tapped tee connection.

B. Install in a thermal well with conductive paste.

C. Strap the bulb on the cooling supply line[][][][][]

D. Mount the bulb on the coolest surface of the chiller.

Answer 93

B. Install in a thermal well with conductive paste.

Question 94

A hydronic heating and cooling convector share the same coil. How many heating/cooling pipes will enter the convector?

A. One for heating and one for cooling.

B. Two for heating and two for cooling[]

C. One for heating and two for cooling[]

D. Two for heating and one for cooling.

Answer 94

A. One for heating and one for cooling.

Question 95

When installing baseboard/wall fin enclosure, where should the heating element be placed?

A. Immediately after the zone control valve.

B. Split it up equally along the wall[][][][][][][][]

C. Close as possible to the highest heat loss.

D. Where there is no damper control[][][][][][][]]

Answer 95

C. Close as possible to the highest heat loss.

Question 96

Of the following, which would be the most important when considering the location of a chiller?

A. Service accessibility.

B. Power source[][][][][][]]

C. Close to thermostats.

D. Venting[][][][][][][][][][][][]

Answer 96

A. Service accessibility.

Question 97

What is used to control the amount of heat leaving a baseboard?

A. Installation height.

B. Perforated enclosure.

C. Pivoting damper[][][][]]

D. Reflective backing[][]]

Answer 97

C. Pivoting damper.

Question 98

Where would a floor mounted hydronic cooling convector be located in a room?

A. On the wall with the lowest heat gain.

B. Near the wall with the highest heat gain.

C. Near the occupied area of the room[][][][]

D. On the floor with the highest heat loss[]]

Answer 98

B. Near the wall with the highest heat gain.

Question 99

Which joining procedure is used for plastic pipe on a natural gas service?

A. Brazing.

B. Threading.

C. Thermal fusion.

D. Solvent welding.

Answer 99

C. Thermal fusion.

Question 100

Which colour coding is used for medical air gas labeling?

A. Green and white.

B. Black and white[]

C. Blue and silver[][]

D. Yellow and silver.

Answer 100

B. Black and white.

Question 101

Which identification systems are used to prevent improper connections for medical gas outlets?

A. Diameter Index Safety System and Pin Index Safety.

B. Dadimater Safety System and Pin Safety System[][][]

C. Double Insert Safety System and Pin Index Safety System.

D. Diameter Index Safety System and Thread Index Safety System.

Answer 101

A. Diameter Index Safety System and Pin Index Safety.

Question 102

Which term is used to describe a complete recirculation of swimming pool water?

A. Rate of exchange.

B. Rate of transfer[][]]

C. Rate of turnover[]]

D. Rate of circulation.

Answer 102

C. Rate of turnover.

Question 103

What must be known to size a lawn irrigation system for proper sprinkler coverage?

A. Size of water service piping, size of water meter and static water pressure.

B. Size of water distribution piping, size of water meter and dynamic water pressure.

C. Size of water distribution piping, size of water meter and static water pressure[][][]]

D. Size of water service piping, size of water meter and dynamic water pressure[][][]]

Answer 103

A. Size of water service piping, size of water meter and static water pressure.

Question 104

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.

Answer 104

C. Graded from the main to the outlet.

Question 105

Which piping material would be used in a dairy factory for conveying milk products?

A. Copper bearing steel.

B. Grey cast iron[][][][][][][]]

C. Galvanized iron[][][][][][]]

D. Stainless steel[][][][][][][]]

Answer 105

D. Stainless steel.

Question 106

Which type of piping connections would be used in process piping systems where frequent replacement of pipe sections is required?

A. Welded.

B. Flared[]]

C. Flanged.

D. Threaded.

Answer 106

C. Flanged.

Question 107

What regular maintenance is required on a testable backflow preventer to insure safe operation?

A. Journeyman plumber tests the device annually.

B. Service man tests the device every second year.

C. Certified specialist tests the device annually[][][][]

D. Property owner tests the device every other year.

Answer 107

C. Certified specialist tests the device annually.

Question 108

A water pressure system pump cycles on and off very quickly when water is being used in the building. Which condition is the most probably cause?

A. Pressure switch differential is too high.

B. Pump pressure switch contacts are dirty.

C. Diaphram tank is water logged[][][][][][][][][]

D. Water supply to the pump is inadequate.

Answer 108

C. Diaphram tank is water logged.

Question 109

What is the corrective action necessary to repair a diaphram type flush valve serving a commercial WC that runs continuously?

A. Turn down the control stop.

B. Replace the vacuum breaker.

C. Clean out the bypass orifice[]

D. Reseat the dislodged orifice.

Answer 109

C. Clean out the bypass orifice.

Question 110

What would be the problem if, on a routine boiler maintenance, you noticed that the boiler water is clean and clear?

A. A blocked air vent.

B. A faulty zone valve.

C. A leak in the system.

D. There is no problem.

Answer 110

C. A leak in the system.

Question 111

Which maintenance procedure is recommended on an instantaneous water heater when the domestic supply is hard water?

A. Adjust the flow restricting device.

B. Reverse in and out lines occasionally.

C. Occasionally run it through a water softener.

D. Isolate and flush the unit with a vinegar solution.

Answer 111

D. Isolate and flush the unit with a vinegar solution.

Question 112

What will happen to the private sewage disposal system if the septic tank is not maintained and emptied on a regular basis?

A. Anaerobic bacteria will cease to function.

B. Solids will carry over and damage the field.

C. Amount of effluent flushed will increase[][][]]

D. Gases in the tank will enter the venting system.

Answer 112

B. Solids will carry over and damage the field.

Question 113

A water closet bowl has a slow and lazy flush, but is recieving enough water and the drain and vent are clear. What could be done to correct the problem?

A. Install a larger water supply line.

B. Open the supply valve fully[][][][]]

C. Clean out the under rim drilling[]

D. Change the flush ball or flapper.

Answer 113

C. Clean out the under rim drilling.

Question 114

Which procedure will correct the occasional dishcarge from a reduced pressure principle backflow preventer when the water pressure fluctuates?

A. Install a swing check valve upstream of the RP.

B. Install a swing check valve downstream of the RP.

C. Restrict the water flow to the RP by using a globe valve.

D. Put in a stronger check valve upstream of the RP[][][][][][]]

Answer 114

A. Install a swing check valve upstream of the RP.

Question 115

What is installed to correct water hammer caused by quickly closing a faucet?

A. 1/2” by 18” air chambers.

B. Regulating quick opening valves.

C. Manufactured arrestors[][][][][][][][][]

D. A home run system[][][][][][][][][][][][]]

Answer 115

C. Manufactured arrestors.

Question 116

An inspection of a hot water heating system shows that the system pressure is in excess of the designed operating pressure. Which device will cause the problem?

A. Circulator.

B. Water feed valve.

C. Outdoor compensator.

D. Prssure relief valve[][][]

Answer 116

B. Water feed valve.

Question 117

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. Dip tube.

B. Anode rod.

C. Mixing valve.

D. Thermocouple.

Answer 117

A. Dip tube.