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Course L > Fourth Year - Block I Miscellaneous Questions[][][][][][][][][][][][][][][][][][][][][][][][][][][][][] > Flashcards

Fourth Year - Block I Miscellaneous Questions[][][][][][][][][][][][][][][][][][][][][][][][][][][][][] Flashcards

1
Q

On a 1” x 1” x 2” back iron malleable tee, what does the 2” refer to?

A. Larger run opening.

B. Branch opening[][][]]

C. Eccentric tee configuration.

D. Concentric tee configuration.

A

B. Branch opening.

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2
Q

What should be done with a drill press as the size of a drill bit increases?

A. Keep speed constant for all sizes of drill bits.

B. Decrease speed as the size of the drill bit increases.

C. Increases speed as the size of the drill bit increases.

D. Use more oil as the size of the drill bit increases[][][]]

A

B. Decrease speed as the size of the drill bit increases.

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3
Q

When joining copper tube in a refrigeration system, what would you use?

A. 95% tin and 5% antimony solder with flux.

B. Bag-5 silver solder with flux[][][][][][][][][][][][][]

C. Bag-5D silver solder without flux[][][][][][][][][]

D. BCuP-5 without flux[][][][][][][][][][][][][][][][][][][][]]

A

D. BCuP-5 without flux.

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4
Q

You are to cut a piece of ABS pipe using pipe cutters. What type of wheel is used?

A

A big wheel.

(A big wheel is used for plastics regardless of diameters)

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5
Q

When soldering a copper pipe to a copper fitting using 95/5 solder with a petroleum base flux, what would be the result if the joint is heated to a red colour?

A. The solder would flow into the joint by capillary attraction and make a leak proof seal.

B. The joint will not be satisfactory unless purged with Nitrogen[][][][][][][][][][][][][][][][][][][][][][][]

C. The joint will not be hot enough and the solder will not turn liquidus[][][][][][][][][][][][][][][][][]

D. The joint will be too hot and the flux will burn[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]

A

D. The joint will be too hot and the flux will burn.

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6
Q

What is the best way to make a threaded transition from PVC to brass?

A. Thread a brass male thread into a female PVC thread.

B. Thread a PVC male thread into a brass female thread.

C. Use a dielectric union[][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]

D. Use a transition union[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]

A

B. Thread a PVC male thread into a brass female thread.

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7
Q

When is a reduced pressure principle backflow preventer required?

A. When the boiler feed water supply is rainwater.

B. When the boiler feed water is from lakes or rivers.

C. When the boiler feed water is thermally treated[][]]

D. When the boiler feed water is from a potable source.

A

D. When the boiler feed water is from a potable source.

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8
Q

What is the procedure for starting a locked out piece of equipment when the lock out key is not available?

A

The supervisor will follow site and company lock out protocol, remove the lock by whatever means and continue the start up procedure.

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9
Q

A sump pump refinery has become very loud and it is clear that it will need to be removed and replaced. The pump is located at the bottom of the sump, which is 2 meters deep. If the correct pump and materials are availabe, what special hazards must be accounted for before replacing the pump?

A. No special hazard precautions are required.

B. A lock out is required[][][][][][][][][][][][][][][][][][][][][]

C. A lockout and a confined space entry permit are required.

D. A lock out, a confined space entry permit, and a hot permit are required.

A

C. A lockout and a confined space entry permit are required.

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10
Q

Where must a safety harness lanyard be attached?

A. To a fixed anchor capable of bearing the shock load which may be applied.

B. To a fixed anchor capabale of bearing the static load which may be applied.

C. To any overhead support that allows sufficient movement[][][][][][][][][][][][][][][][][]

D. To any fixed anchor, providing shock absorbing is utilized[][][][][][][][][][][][][][][][]]

A

A. To a fixed anchor capable of bearing the shock load which may be applied.

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11
Q

When would WHMIS require the use of a workplace label?

A. When the MSDS is missing from a controlled product.

B. When a controlled product is transferred from its original container.

C. When a controlled product is shipped from the manufacturer[][][][][][]

D. When the instructions for use are missing[][][][][][][][][][][][][][][][][][][][][][][][]

A

B. When a controlled product is transferred from its original container.

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12
Q

What do you do to prevent “sugaring” when welding inside of a stainless steel tank?

A

It can be prevented by shielding the line with argon.

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13
Q

What is the effect of high temperature, soft water, on copper water lines?

A. The rate of corrosion is increased.

B. The rate of scaling is reduced[][][][]

C. The rate of corrosion is reduced[][]

D. There are no adverse effects[][][][]]

A

A. The rate of corrosion is increased.

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14
Q

What is installed to prevent galvanic action when connecting to a steel storage tank used as a cooling reservoir?

A

Sacrificial anode.

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15
Q

What is the procedure for sizing a water softener?

A

of people x gallons per day x grains per gallon x regeneration intervals (usual 3 days)

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16
Q

When water enters a building during heavy rain, where/what should a plumber check first?

A

Backwater valve.

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17
Q

Where would you locate the shut-off valve on a gravity fed water supply?

A

As close to the source as possible.

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18
Q

How do you connect a reverse osmosis unit to a drainage system?

A

Indirectly using an air break.

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19
Q

How do you make the change if a vent could be subjet to frost closure?

A

Increase the size of the vent.

(Minimum 3” - Code clause 2.5.6.5.)

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20
Q

What type of bottle should be used when collecting a water sample from a private water system?

A

Sealed and sterilized.

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21
Q

What are the National Plumbing Code requirements involving floors and walls in shower areas?

A

Waterproof.

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22
Q

What are the requirements for flushing potable water lines?

A

Use potable water.

23
Q

If a new water distribution system has been intstalled and cleaned and you notice that the water smells like chlorine, what should be done?

A

Flush it out.

(If the system is clean it will contain chlorine in the sample)

24
Q

Where are shut-off valves required for a water distribution system installed within a shopping mall?

A. On all fixtures.

B. On the water supply to water closets and kitchen sinks.

C. On the water supply to water closets, hot water tanks and lawn services.

D. On the water supply to each store[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]][][]

A

A. On all fixtures.

25
Q

What is done with shackles and pins when job is complete?

A

The pins are placed in the shackles and stored in a clean dry environment.

26
Q

Which drawing would be referenced when exact equipment location is required?

A. Mechanical.

B. Electrical[][]]

C. Architectural.

D. Site[][][][][][][]

A

C. Architectural.

27
Q

How do you replace the cutting dies on a threading machine?

A

Numerical order.

28
Q

What is required when you connect only drinking fountains to a stack that passes through 4 floors that drains into a rainwater leader?

A. Indirect connection with no vent required.

B. Indirect connection with a vent extended to outdoors.

C. Indirect connection and stack vent tied into another plumbing vent.

D. Indirect connection with a seperate stack vent and backwater valve.

A

B. Indirect connection with a vent extended to outdoors.

29
Q

Convert 120 US gallons/min to fixture units.

A

240 fixture units.

(Just times 120 by 2)

30
Q

A cast iron soil or wastes stack needs to be repaired near the bottom of the stack due to a piece having a crack in it. What things must be considered before replacing the broken piece?

A

Make sure system is fully drained.

Strap and secure the soil-or-waste stack.

Talk to the people above[][][][][][][][][][][][][][][]

31
Q

A copper water service pipe is to be removed and replaced with a polyethylene (PE) water service. What components must be added to the system.

A

Check valve.

32
Q

What type of backflow preventer would be required on a black iron fire standpipe system with chemicals added? What if there were no chemicals added?

A

RPBA.

DCVA.

33
Q

What type of backflow preventer would be required on a back iron fire standpipe system with no chemicals added?

A

DCVA.

34
Q

Who would you consult with before coring a hole in a concrete slab?

A

Structural engineer.

35
Q

What is the maximum permitted temperature to a showerhead?

A

120 D/F.

36
Q

How would you connect two pyrex pipes if one had a factory bead and the other had a field cut?

A

Bead to plane MJ.

(Wet coupling on fitting before use)

37
Q

What is a consideration when installing a water service in corrosive soil?

A

Use suitable pipe for the application.

38
Q

What would need to be serviced every two months on a water softener?

A

Check salt levels.

Clean brine tank annually.

39
Q

What is the required torque and sequence for installing mechnical joint couplings?

A

60 inch pounds.

40
Q

What components would be required for a spray painting application using compressed air?

A

Regulator.

Filter[][][][]]

Water seperator.

41
Q

What is the required safety valve rating for a low pressure steam boiler.

A

15 psig.

42
Q

What is the minimum height requirement for a PVBA in an irrigation system?

A

300mm.

43
Q

Why would a plumbing trap lose it’s seal?

A

Blocked vent.

Evaporation[]

Momentum siphonage.

Possiblly S-Trap[][][][][][][]

44
Q

Where is the expansion tank located in a boiler system in relation to the pump?

A. At the inlet of the high pressure.

B. At the outlet of the high pressure.

C. At the inlet of the low pressure[][]]

D. At the outlet of the low pressure[]

A

C. At the inlet of the low pressure.

45
Q

What would you use in order to make the transition from asbestos cement pipe to PVC?

A. Transition glue.

B. Mechanical joint.

C. Victaulic coupling.

D. Shark bite[][][][][][][]

A

B. Mechanical joint.

46
Q

To what depth must lead and oakum be packed?

A. 25mm.

B. 50 mm.

C. 75mm[]

D. 100mm.

A

A. 25mm.

(Clause 2.3.2.7)

47
Q

Where is the low pressure steam boiler relief valve discharge located?

A. Vertical, close to the ceiling.

B. Close to the floor[][][][][][][][][]]

C. Vertical to the outdoors[][][][]

D. To the tank[][][][][][][][][][][][][][][]

A

C. Vertical to the outdoors.

48
Q

A shallow well pump with an expansion tank is cycling. How do you fix it?

A. Fix the foot valve.

B. Replace the shraeder valve.

C. Replace the pressure relief valve.

D. Change the pump[][][][][][][][][][][][][][]]

A

B. Replace the shraeder valve.

49
Q

What would you do to repair a water logged expansion tank?

A. Drain water from the expansion tank.

B. Add air to the galvanized tank[][][][][][}

C. Add water to the hydro cell[][][][][][][][][]

D. Add air to the hydro cell[][][][][][][][][][][]]

A

A. Drain water from the expansion tank.

50
Q

In a dairy farm, what is the most important consideration when installing stainless steel pipe?

A

Sanitation.

51
Q

When servicing a boiler what parts do you lock out?

A

Electrical controls.

Gas valve/Pump[]]

52
Q

A drawing shows a septic distribution field. The contour lines indicate that it’s at a higher elevation than that of the tank. What system do you use?

A. Sump pump.

B. Submersible pump.

C. Some other pump[]]

D. Siphon and bell[][][]]

A

A. Sump pump.

53
Q

When shutting off the water to an apartment building, who do you notify first?

A. Building owner.

B. Building occupants.

C. Building superintendent.

D. Building designer[][][][][][]

A

A. Building owner.

54
Q

On a four wire zone valve, what are the wires from the end switch wired into?

A. The relay which operates a pump.

B. The gas valve[][][][][][][][][][][][][][][][][][][]

C. The thermostat[][][][][][][][][][][][][][][][][]]

D. The safety shut off valve[][][][][][][][]]

A

A. The relay which operates a pump.

Course L (30 decks)

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