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Hi > Fourth Year - Plumbing Level 4: BCIT Custom 2017 > Flashcards

Fourth Year - Plumbing Level 4: BCIT Custom 2017 Flashcards

1
Q

Whose recommendations should be followed for proper start-up?

A. Plumbing code.

B. Gas code[][][][][]]

C. Boiler manufacturer.

D. Homeowner[][][][][][][]]

A

C. Boiler manufacturer.

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2
Q

Which section of the manufacturer’s manual covers the distance the boiler is to be located from combustable materials?

A. Pre-installation.

B. Unpack boiler[]

C. Water piping[][]

D. Gas piping[][][]]

A

A. Pre-installation.

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3
Q

After completing the water piping in a hydronic heating system, the installer should:

A. Clock the gas meter.

B. Test the safety relief valve on the boiler.

C. Smoke-test the venting system[][][][][][][][]

D. Flush the piping to remove all impurities.

A

D. Flush the piping to remove all impurities.

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4
Q

What standard must be followed when venting the flue gases from the boiler?

A. Authority having jurisdiction.

B. Plumbing code[][][][][][][][][][][][]

C. Manufacturer’s specification.

D. Builder’s code[][][][][][][][][][][][][]

A

A. Authority having jurisdiction.

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5
Q

What can happen if a system is not properly filled?

A. Water hammer within the piping.

B. Expansion of the water in the system.

C. Air trapped in the system piping[][][][][]

D. Water will not transfer heat properly[]

A

C. Air trapped in the system piping.

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6
Q

If a gas line does not hold during a pressure-test due to a leak, what is the best way to find the leak?

A. Soapy water test.

B. A 9V flashlight[][]]

C. A propane torch[]

D. A smoke test[][][]]

A

A. Soapy water test.

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7
Q

What is the first step in servicing a boiler venting and main burner?

A. Check the vents for soot buildup.

B. Check the orifice passage[][][][][][]]

C. Check the manifold pressure[][][][]

D. Turn off the electrical and gas supplies.

A

D. Turn off the electrical and gas supplies.

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8
Q

What is the best way to clean a main burner?

A. Pressure washer.

B. Buffing wheel[][][]

C. Vacuum and soft brush.

D. Compressed air with burner in place.

A

C. Vacuum and soft brush.

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9
Q

When technicians perform continuity tests, they are checking for:

A. Opened or closed set of contacts.

B. Amperage reading[][][][][][][][][][][][][][]

C. Voltage reading[][][][][][][][][][][][][][][][][]

D. DC current[][][][][][][][][][][][][][][][][][][][][]

A

A. Opened or closed set of contacts.

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10
Q

What type of thermostat is used on a hot water heating system?

A. Dual acting thermostat only.

B. Thermostat without a heat anticipator.

C. Thermostat with a heat anticipator[][][]]

D. Digital thermostat only[][][][][][][][][][][][][][]]

A

B. Thermostat without a heat anticipator.

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11
Q

A loose wire on an aquastat may:

A. Overheat the boiler.

B. Prevent the main burner from firing.

C. Cause the main pump to stop circulating.

D. Prevent the thermostat from functioning properly.

A

B. Prevent the main burner from firing.

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12
Q

What is the main function of a LWCO on a hot water heating boiler?

A. To add water to the heating system.

B. To prevent backflow of heating system water into the potable water system.

C. To prevent the boiler main burner from starting when there is no flow[][][][][][]]

D. To prevent the boiler main burner from starting when there’s low water condition.

A

D. To prevent the boiler main burner from starting when there’s low water condition.

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13
Q

What is the procedure for testing a float-type LWCO?

A. Isolate and drain the LWCO so the main burner will shut down.

B. Isolate and drain the LWCO so the main burner will start[][][][][][]

C. Remove the wires to the LWCO[][][][][][][][][][][][][][][][][][][][][][][][][][][][]]

D. Turn off the main circulator, which causes the burner to shut down.

A

A. Isolate and drain the LWCO so the main burner will shut down.

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14
Q

What should be done if you test a 24 VAC transformer and obtain a reading of zero?

A. Replace the transformer.

B. Replace the windings on the coil.

C. Test the supply power to the transformer.

D. Check the operating aquastat[][][][][][][][][][]]

A

C. Test the supply power to the transformer.

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15
Q

A spill switch is designed to detect:

A. Products of combustion spilling out of the draft hood.

B. Water being spilled on the mechanical room floor[][][]]

C. Flame rollout from the main burner[][][][][][][][][][][][][][][][][]

D. A high concentration of carbon dioxide[][][][][][][][][][][][]]

A

A. Products of combustion spilling out of the draft hood.

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16
Q

What may untreated water cause in a hydronic heating system?

A. Water hammer within the piping.

B. Ferrous material to oxidize[][][][][]]

C. Temperature fluctuations in the system water.

D. Primary pump to surge[][][][][][][][][][][][][][][][][][][][][]]

A

B. Ferrous material to oxidize.

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17
Q

What is the main function of a zone valve in a hydronic heating system?

A. To limit the amount of feed water to the boiler.

B. To stop and start the flow of water to a circuit.

C. To prevent reverse flow of water in a zone[][][]

D. To ensure boiler water level[][][][][][][][][][][][][][][][]]

A

B. To stop and start the flow of water to a circuit.

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18
Q

What must the technician do when the zone valve drive motor fails?

A. Rebuild the drive motor.

B. Shut down and drain the system water, then replace the zone valve motor.

C. Recalibrate the zone drive motor[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]

D. Replace the drive motor[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]

A

D. Replace the drive motor.

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19
Q

What will happen to a non-condensing boiler when the return water temperature is too low?

A. Cool return water temperatures do not affect non-condensing boilers.

B. The boiler will overheat[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]

C. There will be unnecessary damage and boiler failure[][][][][][][][][][][][][][][]]

D. The LWCO will shut off the main burner[][][][][][][][][][][][][][][][][][][][][][][][][][][]]

A

C. There will be unnecessary damage and boiler failure.

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20
Q

What should be completed after finishing a service call?

A. Proper service and maintenance log.

B. Boiler warranty card[][][][][][][][][][][][][][][]]

C. Homeowner warranty card[][][][][][][][][]

D. Timetable sheet[][][][][][][][][][][][][][][][][][]]

A

A. Proper service and maintenance log.

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21
Q

What type of interceptor uses a baffle?

A. Solids interceptor.

B. Grease interceptor.

C. Oil interceptor[][][][]]

D. Garbage interceptor.

A

B. Grease interceptor.

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22
Q

What type of interceptor requires an orifice plate?

A. Solids interceptor.

B. Grease interceptor.

C. Oil interceptor[][][][]

D. Garbage interceptor.

A

B. Grease interceptor.

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23
Q

What type of interceptor would be required for a dental office?

A. Solids interceptor.

B. Grease interceptor.

C. Oil interceptor[][][][]

D. Garbage interceptor.

A

A. Solids interceptor.

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24
Q

What principle is used in the separation of oil or gas from wastewater?

A. Sedimentation.

B. Settlement[][][]]

C. Flotation[][][][][]]

D. Baffling[][][][][][][]

A

C. Flotation.

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25
Q

What are the three main styles of grease interceptors?

A. Oil, grease, solids.

B. Recessed, square, vented.

C. Recessed, semi-recessed, floor-mounted.

D. Floor-mounted, semi-recessed, recessed.

A

C. Recessed, semi-recessed, floor-mounted.

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26
Q

What is the chemical classification of an enzyme?

A. Activator.

B. Digester.

C. Catalyst[]

D. Cleaner[]

A

C. Catalyst.

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27
Q

To size a grease trap you would use:

A. The size of the drain.

B. The volume of the sinks.

C. The length of the drain[][]

D. The size of the garbage grinder.

A

B. The volume of the sinks.

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28
Q

For a grease interceptor to serve as a trap for a fixture it must have:

A. A removable orifice plate.

B. A cleanout on the outlet[]]

C. A cleanout on the vent[][]]

D. A 1 1/2” trap seal[][][][][][][][]]

A

D. A 1 1/2” trap seal.

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29
Q

The minimum size of vents on an oil interceptor is:

A. 1 1/4”.

B. 1 1/2”.

C. 2”[][]]

D. 2 1/2”.

A

A. 1 1/4”.

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30
Q

The proper method of disposing of grease removed from an interceptor is to:

A. Flush it down the sewer.

B. Send it to a compost facility.

C. Send it to a landfill[][][][][][][][]]

D. Send it to a rendering plant.

A

B. Send it to a compost facility.

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31
Q

Interceptors should be cleaned:

A. Once in a while.

B. Every four hours.

C. On a regular schedule.

D. When they plug[][][][][][]]

A

C. On a regular schedule.

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32
Q

What is the minimum size of an air break?

A. 1”.

B. 1 1/8”.

C. 1 1/4”.

D. 1 1/2”.

A

A. 1”.

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33
Q

What is the only fixture that may be connected either directly or indirectly to a drainage system?

A. Sterilizer.

B. Food display.

C. Bar sink[][][][][]

D. Drinking fountain.

A

D. Drinking fountain.

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34
Q

An example of clear water waste is:

A. Coffee drippings.

B. Cooling water[][][]

C. Sewage[][][][][][][][]

D. Drainage[][][][][][][]

A

B. Cooling water.

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35
Q

Which of the following fixtures may be indirectly connected to a storm drainage system?

A. Water closet.

B. Food display.

C. Dishwasher[]]

D. Drinking fountain.

A

D. Drinking fountain.

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36
Q

Indirect connections may not be located:

A. In a crawl space.

B. Under a sink[][][]]

C. In a kitchen[][][][]]

D. In a corner[][][][][]

A

A. In a crawl space.

37
Q

What is the maxium specified volume of sewage production that is covered under the Private Sewage Disposal Systems Regulation?

A

25 cubic meters.

(5 500 gallons)[]

38
Q

Which regulation contains requirements for outdoor privies?

A

Alberta Private Sewage Systems Standard of Practice 2009.

39
Q

Why does the Alberta Private Sewage Systems Standard of Practice 2009 indicate the objective of an on-site wastewater treatment system to treat wastewater and return it to the environment?

A

A. Risks to health are not created.

B. The environment is not harmed.

C. The impact on the ground and surface waters is minimized.

40
Q

What nine (9) components may be included in systems designed and installed using the Standard of Practice 2009?

A

A. Gravel filters.

B. Holding/Septic tanks.

C. Open discharge systems.

D. Packaged sewage treatment plants.

E. Privies[][][][][][][][][][][][][][][][][][][][][][][][][][]

F. Sand filters[][][][][][][][][][][][][][][][][][][][][][]

G. Treatment fields[][][][][][][][][][][][][][][][][]

H. Treatment mounds[][][][][][][][][][][][][][]

I. Wastewater or effluent lagoons[][][]]

41
Q

Name the two (2) gases, frequently present in septic tanks, that are deadly poisons.

A

A. Carbon monoxide (CO).

B. Hydrogen Sulphide (H2S).

42
Q

When working with private sewage disposal system components, what are the two (2) most common ways to contract an infection?

A

A. Ingestion.

B. Unprotected cuts and scratches.

43
Q

The amount of oxygen (expressed as mg/L) utilized by micro-organisms in the oxidation of organic matter during a 5-day period at a temperature of 20°C (68°F). This measure is typically used for raw wastewater samples. Is the definintion of?

A

BOD5.

44
Q

The dispersed particulate matter in a wastewater sample that may be retained by a filter medium. Suspended solids may include both settleable and unsettleable solids of both organic and inorganic origin. This parameter is widely used to monitor the perfomance of the various stages of wastewater treatement, and is often used in conjunction with BOD5 to describe wastewater strength is the definition of?

A

TSS.

45
Q

What is the requirement for the termination of a manhole (access opening) for a septic tank?

A

Access openings to a septic tank shall not be buried and shall be located at a height above the surrounding landscape that ensures surface water will drain away from the access opening (SOP - 4.2.2.3(1)).

46
Q

What three (3) components of sewage are measured to determine if the sewage is residential strength and what are the acceptable limits?

A

A. BOD5 - 220 mg/L to 300 mg/L.

B. TSS - 220 mg/L to 350 mg/L[][]

C. Oil and grease content - 50 mg/L to 70 mg/L.

47
Q

What is the minimum size septic tank for a 4 bedroom house with a garbage grinder?

A

6390 L.

48
Q

Name the three (3) most common materials used to make septic tanks.

A

A. Concrete.

B. Fiberglass.

C. Polyethylene.

49
Q

Referring to the figure below, name the labelled parts of the septic tank.

A

A. Inlet device.

B. Manhole covers.

C. Scum/air space[]

D. Septic chamber[]

E. Outlet device[][][]

F. Liquid depth[][][]]

G. Partition[][][][][][][]

H. Wall[][][][][][][][][][]

I. Effluent chamber.

50
Q

The separation of solids within the septic tank occurs by _________ and __________.

A

Flotation.

Settlement.

51
Q

What type of bacteria action occurs within the septic chamber or tank?

A

Anaerobic bacteria.

52
Q

To prevent groundwater or surface water from entering the tank to dilute the sewage or to cause cooling of the sewage, both of which will retard bacterial action and have a negative effect on the separation of solids is the definition of?

A

Why a septic tank, manhole extension and mahole cover must be watertight.

53
Q

Why is it important that clear water wastes, subsoil drainage and wastes from water softeners not be allowed into a septic tank?

A

Because they cool the septic compartment.

(Also, the septic tank and final treatment components are not sized to accomodate excessive overloads of effluent).

54
Q

How often should a septic tank be checked for sludge and scum layer depths?

A

Annually.

55
Q

At what maxium depth of sludge should the septic tank be cleaned?

A

450 mm (18 inches).

56
Q

What effect does the installation of a garbage grinder have on the sludge and scum layers?

A

Garbage grinders add excessive solids to the depth of both the scum and sludge layers, which results in a need for more frequent cleaning of the septic tank.

57
Q

What is the purpose of a baffle or inlet fitting on a septic chamber?

A

Allows sewage to enter the septic chamber without disturbing the scum layer.

58
Q

Why is the length and placement of the outlet fitting critical?

A

The outlet baffle must be positioned to allow for the clearest liquid in the septic tank chamber to flow into the effluent chamber.

59
Q

When a septic chamber is designed for effective separation of sewage, the length should be how many times the width?

A

Two to three times.

60
Q

A 3/4” service line and a 5/8” water meter at 45 psi static pressure will supply a volume of _ U.S. gallons per minute.

A

7.

61
Q

What is the increase in available water supply in US gallons at 55 psi if a 3/4” water service has 5/8” water meter repalced with a 3/4” water meter?

A

2 US gpm.

62
Q

The pressure within a building when no water is flowing is the definition of?

A

Static pressure.

63
Q

The measurement of pressure while water is flowing is the definition of?

A

Dynamic pressure.

64
Q

An alternative method of determining available water supply, rather than using water meter and service pipe sizes, is the ______ ____.

A

Bucket test.

65
Q

The device that activates the control valve is the _______ _____ or _____.

A

Control panel or Timer.

66
Q

All heads that are used on one zone valve should be:

A. Popup style.

B. Gear drive[][]]

C. The same type.

D. The same flow rate.

A

C. The same type.

67
Q

To determine the layout of the heads within the irrigation system, prepare a ____ _______, showing the locations of buildings, sidewalks, driveways and areas to be irrigated.

A

Site drawing.

68
Q

When irrigation heads are installed for a vegetable garden, the heads should be placed on ______ to prevent interference with the spray pattern by the plant foliage.

A

Risers.

69
Q

The two most common piping materials used for irrigations systems are ___ for manifolds and ____________ for laterals.

A

PVC.

Polyethylene.

70
Q

Control valves are used with a timer are referrred to as either __________ or ________ valves.

A

Electronic.

Solenoid[]

71
Q

Irrigation system layout and design should allow for the winterizing of the system through the placement of _____ ______ at the lowest points or with the removal of water through the heads with the use of compressed air.

A

Drain valves.

Compressed air.

72
Q

A _______ head is commonly used in flowerbeads, planters and for spot watering.

A

Bubbler.

73
Q

A ________ head moves by the water passing through the head, driving gears that propel the head.

A

Rotating.

74
Q

An _______ head moves by the water passing through the head hitting a tarp arm that propels the head.

A

Impulse.

75
Q

A ____ ______ can be connected to a control panel to interrupt the watering pattern during wet weather.

A

Rain sensor.

76
Q

An ___________ ______ ______ can only be installed downstream of the control valve to provide cross-connection control.

A

Atmospheric vacuum breaker.

77
Q

A pressure vacuum breaker must be installed __ inches or ___ mm above the highest point through which water might enter an irrigation head.

A

12.

300.

78
Q

A ____ _____ is a non-testable device that may be permitted in some jurisdictions for installation on the service pipe to a residential irrigation system with no added treatment.

A

Dual check.

79
Q

A _______ ________ _________ backflow preventer must be installed on a system that incorporates an automatic injection system for fertilizer.

A

Reduced pressure principle.

80
Q

What method is used to empty a sewage holding tank?

A. Sewage lift pump.

B. Vacuum truck[][][][]

C. Hand pump[][][][][]]

D. Pump truck[][][][][]]

A

B. Vacuum truck.

81
Q

What type of sewage holding or receiving tank has the greatest depth of bury?

A. Plastic.

B. Concrete.

C. Fiberglass.

D. Cast iron[]

A

B. Concrete.

82
Q

What type of backfill material is used when installing a plastic sewage holding tank?

A. Clay.

B. Top soil.

C. Sand[][]]

D. Pit run[]

A

C. Sand.

83
Q

What type of tank is required when fixtures are located below the level of the building drain?

A. Holding tank.

B. Storage tank.

C. Think tank[][]]

D. Receiving tank.

(Sewage sump)[][]

A

D. Receiving tank.

84
Q

What is the minimum weight that the lid of a sewage holding tank must be to be considered safe from access by children?

A. 45 lbs.

B. 55 lbs.

C. 65 lbs.

D. 75 lbs.

A

C. 65 lbs.

85
Q

What is the minimum size of a sewage holding tank?

A. 800 gal.

B. 1000 gal.

C. 1050 gal.

D. 1200 gal.

A

B. 1000 gal.

86
Q

What is the minimum size vent for a sewage sump?

A. 1 1/4”.

B. 1 1/2”.

C. 2”[][][]

D. 2 1/2”.

A

C. 2”.

87
Q

The minimum size sewar service for a mobile home is:

A. 2 1/2”.

B. 3”[][][]]

C. 4”[][][]]

D. 6”[][][]

A

C. 4”.

88
Q

The minimum size water service for a mobile home is:

A. 1/2”.

B. 3/4”.

C. 1”[][]

D. 1 1/4”.

A

B. 3/4”.

89
Q

The minimum height of the vent pipe for a RV sewage dump is:

A. 1.25 m (4’).

B. 1.5 m (5’)[]]

C. 2.0 m (7’)[]

D. 2.5 m (8’)[]

A

C. 2.0 m (7’).

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