Q&A Unit 5 Remainder Of Questions * Checked* Flashcards
(113 cards)
1
Q
What would be the main consideration when constructing an expansion loop?
A
That the loop is not too small
2
Q
How is poly pipe connected to a barbed fitting for a pump?
A
Using two gear clamps opposite in direction to each other
3
Q
What must be done prior to performing a smoke test?
A
Fill traps and cap off all vents
4
Q
Recirculation pump is causing cavitation on fittings downstream. How would you test for this condition?
A
Take an amperage reading on the pump
Water turning into vapour and back to water ( cavitation) when pump is working too hard. See if how much work the pump is doing with amperage reading
5
Q
On which drawings would you find the location of a chiller?
A
Mechanical drawings
6
Q
And a 120 V branch circuit, which of the following colours would be identified as being “hot“?
A.white
B.Red
C.green
D.bare
A
B.Red
7
Q
In a 120 V branch circuit, which of the following colours would identify as a wire being“neutral“?
a.white
b.red
C.green
d. Bare
A
A. white.
8
Q
What type of toilet seat is required for public use?
A
Open front
9
Q
What wrench is best used for confined spaces
A
Chain wrench
Designed for confined spaces
Similar to strap wrench
10
Q
Of the following choices, which does not occur in a septic tank
A.putreication
B.anaerobic decomposition
C.aerobic decomposition (oxidation)
D.septiczarion
A
C.aerobic decomposition/oxidation
11
Q
How often must construction workers have his or her hearing test tested
A
Every year
12
Q
A class “a” fire involves what
A
Wood
13
Q
Location of a safety harness that a lanyard attaches to is where?
A
The back
14
Q
You must not stand on which rungs of the ladder
A
The top two
15
Q
What is the maximum height of a rolling freestanding scaffold?
A
Twice the minimum base dimensions
16
Q
Above what height must a scaffold have guard rails?
A
10 feet
( or risk exists/ working 4’ above rebar)
The guard rails average hight from platform is between 40-44” ( answer on test is 42” for average) and the knee bar/ rail is in between
At 10’ guardrails or fall arrest!
17
Q
Toe boards must be a minimum of how many inches in height
A
4 inches in height
Toe board is on scaffolding, it is the board that goes on the platform stopping tools from falling off the platform (also can’t have more than a 1/2” gap)
18
Q
Before excavation can be started what must be located
A
Services
19
Q
How many horn signals would indicate that blasting is about to start?
A
12 short signals
20
Q
Following the blast, what indicates that it is safe to return
A
One long 5 second signal
21
Q
A class “B” fire involves what?
A
Combustible liquids
22
Q
A class “C“ fire involves what materials
A
Electrical materials
23
Q
A class “D” fire involves what material
A
Combustible metals
24
Q
In addition to fuel and oxygen of fire needs what
A
A source of ignition
25
If you use a CO2 extinguisher on a fire, what substance is removed from CO2?
Oxygen
26
After you use a chemical extinguisher on a wood or paper fire, what should you do?
Use water liberally to quench any embers
27
A vessel previously used to hold a flammable substance must be welded. What must you do before lighting the torch?
Fill the vessel with an inert gas
28
You are asked to enter a confined space. What precautions must you take?
Have vessel snifted; we’re breathing equipment, safety, harness, and lanyard; have a partner outside
29
What term is given to specify elevation used as a reference point for all other elevations on the job site
Benchmark
30
The correct name to identify the lines visible in the eyepiece of the builders level is
Crosshairs
31
The point of inspection of the vertical and horizontal hairs in the eyepiece of a builders level is called
Crosshairs
32
A reading of the rod on the benchmark would be called a
Backsight
33
A rod reading taken on unknown elevation would be called a
Backsight
34
Another name for a builders level is
A.a torpedo level
B.”dumpy” level
C.laser level
D.all of the above are correct
B.“dumpy“ level
35
A turning point would indicate which of the following
A. an elevation used as a reference point after an instrument has been moved to a new location
B.the spot marked on the rod when you turn the telescope to a new reading
C.the mark on the vernier scale where the instrument is turned
D. The point where you finally thought you knew what you were doing.
A. an elevation used as a reference point after an instrument has been moved to a new location
36
What is another name for a three view mechanical drawing?
Orthographic ( means 3 different views- )
37
The proper location for a front elevation of a three-dimensional drawing would be at which location
Directly below the plan view on the page
Devon’s explanation “ think of the a 3 dementional cube, label the sides- top, front, right, back, bottom and left”
The orthographic is this cube unfolded it to be 2 demential on the paper. You are only giving the top, front and right of the cube. You would now be looking at the plan view of the cube from above. And the front of the cube measurement on the plan view would be the elevation.
38
“Standard” tank type water closet will require approximately how many gallons per flush
4 to 7 gallons per flush
39
When a plumbing fixture is delivered to a job site, the plumber would have to do which of the following
A.examine the shipment for damage
B. notify the shipping company of any damage
C.make a note of any damage on the invoice
D.all of the above
D.all of the above
40
The fourth hole in a four hole stainless steel sink is usually meant for the installation of what
A soap dispenser
41
What is the correct way of installing a basket strainer in a kitchen sink
Place a ring of putty around the lip on the body and push it into the sink, place a rubber gasket underneath the lip on the body and pushed into the sink, install the basket strainer after the sink is placed into the cabinet top
42
When using A PeX flexible, water supply tube to connect a kitchen faucet the ferrule at the compression stop and would be made of what
Plastic
43
Laundry tray faucet spouts for domestic installation usually have what
Swivel spouts with hose bib ends
LAUNDRY TRAY IS A LAUNDRY SINK BESIDE THE LAUNDRY
44
What does the abbreviation “P.O.” mean?
Prevented overflow
45
What type of P.O.plug that requires a mechanical linkage is correctly called a what
Pop up waste
46
What do you need to do before turning the tap onto to test the newly installed basin faucet?
Clean away access putty, remove aerator, turn off the faucets
47
What would be the last task plumber would do after installing and testing a plumbing fixture
Wipe the fixture clean
48
Water is collecting on the floor at the back of the water closet. What is its probable cause?
1. The humidity in the room is too high 2. The tank on the water closet is cracked 3. The water inlet connection is loose.
49
What could be done to help stop water condensation on a toilet tank
Install a tank liner, and improve the ventilation of the bathroom air
50
What is the word best describes the action a plumber would use when using a flat sewer tape
Ramming motion
A sewer tape is a sewer snake…( home owner special snake. ) not a real
51
What is another name for a plunger?
Force cup
52
After a stoppage in a water closet bowl is cleared The Plumber would do?
Test flush on the water closet with a wad of toilet paper several times
53
Which of the following is a type of “flush monitor“ valve?
A. Diaphragm.
B. Piston.
C. Bypass.
D. Both A and B are correct.
D. Diaphragm and piston!
Flushometer is the valve is the valve on a flush valve toilets.
The screw on the first component coming out of the wall to the flushometer is the adjustment screw. The diaphragm flush valve on a water closets is 1” NPS - and 3/4” mps on a urinal.
54
What gas when found in a water supply will tarnish silver, and produce offensive odours
Hydrogen sulphide
55
Taste in older problems in water would be best treated with what
Activated carbon filters
56
The process of adding alum to water to treat it is done to
Cause coagulation of fine suspended matter
A salt(alum) is added to a tank. What it does is causes the fine suspended solids and it makes them clump together.
57
Well, a water softener is regenerating. What type of water is supplied to fix fixtures?
Hard water is supplied to fixtures
58
What needs to be in place for a water softener can be shut down for repair
A bypass with a shut off and shut off on the inlet and outlet are installed
Devon’s stuff he says “ keep in mind well your doing the IP you are picking the best awnser”
59
Who will demand the bacteriallogical test of a rural water supply before it is put into service
The provincial health board
Devon- “ if you were establishing a well, a ticketed individual installing that the well would contact the provincial health board. In our case the interior health. The water purveyor, plumbing inspector do not care about your health” paraphrased
60
Iron in solution can be removed by what type of treatment?
Chlorination with filtration and manganese green sand zeolite
61
Water flows through in a
downward direction in which type of cycle
?
in an upward direction in what type of cycle
?
A downwards direction during the softening cycle
An upward direction during the rinse cycle
62
A chemical used to lower the pH in a swimming pool is what
Muriatic acid???
Muriatic acid is an acid used to LOWER the ph in a pool. This is when you have too high of PH (Basic) and you need something acidic to lower it
63
A chemical used to rise the pH in a swimming pool is
Soda ash
64
Which of the following pH values would cause the most corrosion in pool recirculation equipment
A. 6.5.
B. 7.0.
C. 7.5.
D. 8.0.
D. 8.0
Basic water can be more damaging to pool equipment. Also in this question 8 is furthest from neutral. (7 being neutral)
65
What are the enclosures called that house the valves for isolation of pipelines in a medical gas system?
Zone valve box assemblies
66
What device in a rural Hydro pneumatic system controls the pump
The pressure switch
67
What must be done to set a jet pump for use in a deep well application?
Put the injector into the well below the water level
68
What is the recommended way to clean a plugged Venturi in a water softener?
Use a paper clip to clean it out
A indication of a Venturi is plugged is that you are getting a lot more hard water.
First thing to check if there is salt in the brine tank. If there is than the only logical explanation is the Venturi is not pulling the salt into water softener. The Venturi is narrow so a paper clip would be the most practical way to clean it.
69
What does a PH of 8.0 indicate
An Alkali
70
How should the U-bolt be placed on a wire rope in order to create an eye in the rope?
Use three wire rope clips, all in the same orientation
The dead end of a rope clip is the “ U bolt portion”
Orientation of bolts are to be installed …-
Last clip- first clip- middle clip
Wire clip spacing is 6-7 rope diameters apart. Wire clips need to be torqued to manufacturers specs. The clips must be retorqued every hour of use.
71
In reference to putting wire rope clips on a working piece of wire rope, what old saying should be followed?
….What is this question????
“Never saddle, a dead horse“
72
What is the maximum amount of iron that can be removed through a water softener in parts per million?
3 ppm
73
What is the main consideration in choosing the correct speed for drilling a hole in a piece of steel using a sanitary drill press
The thickness of the work piece
74
What is the colour of ink on a thinness type of copper tubing that can be used for a water service?
BLUE
( BC does not allow type M to be used as a water service pipe)
75
What is installed along an oil tank in a basement of a house that when filling allows you to know when the tank is near it’s maximum fill level
A vent whistle
Devon- draws furnace on board- when installing furnace in conjunction with an oil tank. ( unusual) the oil tank has a vent whistle installed in conjunction with the tank that “whistles” when the tank is full. “this install is typically installed back east” - Devon-
76
What is the minimum pipe size for a water supply to a flush valve of water closet?
1 inch
77
What type of main shut off valve can be typically found on a fire sprinkler system for a building
A geared operated butterfly valve
Fire sprinkler systems valves need to have a VISUAL INDICATION stating they are open or closed! A rising stem and yoke gate valve ccan be used but a non rising stem and yoke gate valve cannot
78
Where would the air vent be installed for a downed heat Transfer unit in a one pipe hot water heating system
In the main above the H.T.U
Devon - draws a boiler below the main piping system- he says that since the boiler is below the piping system the high point is going to the boiler is on the main above boiler. You would put it in conjunction with the return so there is no air going back IN to the system
79
Where would the air vent be installed for an upfed heat transfer unit in a one pipe hot water heating system
On the return end of the H.T.U
80
What is the most common type of pump used in a residential deep well situation?
A submersible pump
81
Where is the best location for a micro bubbler resorber for a hydronic heating system?
Where the velocity is slowest and the water is hottest
“ micro bubbler” is part of an airscoop!!!
82
Where is the best location for an air scoop for a hydronic heating system?
On the boiler supply at the point of no pressure change
83
Where is the point of no pressure change on a hydronic heating system?
Where the compression tank is connected to the piping
84
What voltage design is used for thermostats that controlled both the heating and cooling in the house
24 V.a.C
ALL CONTROL WIRING IS 24-VAC
85
What gas is used when purging braising copper in a medical gas system
Nitrogen
86
What determines the correct code zone used to size a low pressure natural gas system
The longest measured run
87
What is the minimum protected requirement for a standpipe system in a commercial building?
DCVA
Stand pipe system is fire suppression system in a building that has a vertical pipe and fire boxes in stair wells
The minimum back-flow prevention is DCVA on fire suppression system
88
Where in a rural sewage disposal system would you find washed gravel?
In a septic field for the probagation of aerobic bacteria
Devon- draws a diagram of a lateral in a septic system. The diagram is of of the elevation view of the trench.
- the minimum width of the trench is 12”
-The maximum trench width is 32”
-The trench depth is between 24” and 32”
- the pipe is between 3”-4” ( 4” typical)
- from the bottom of the trench to the pipe contains 9” of WASHED gravel to the bottom of a pipe
- the top of the pipe has 2” of soil
- ON TOP of the 2” of gravel there is 3” of top soil
- the minimum distance between lateral trench’s is 4’ of undisturbed earth
89
When connecting a soil or waste stack to a horizontal branch that serves a bathroom group upstream of the connecting point what proper fittings do you use?
A wye and a 1/8” bend
90
Where would you place the low water cut off on a steam boiler?
At the minimum safe water level of the boiler
91
If a resort has 20 visitors and five employees and the visitors use 200 L per day while the employees use 50 L per day what size tank would be required for a 15 day retention period
63,750 L
92
A yard hydrant
Is self drained and frostproof?
( not quite accurate but for memory)
A yard hydrant is a “well system hose bibe” ( not actually) just remeber it as a “hose bibe” that needs to protect against freezing because the piping terminates to OUT SIDE!
93
A ladder must project above the working platform by how many metres
1 m 3ft
94
If a worker, we’re standing looking at a building facing west what side of the building would he be looking at?
East
If this question comes up draw this bitch out. It is easy.
Compass——
N
W. E
S
95
What would be the probable cause of a relief valve on an RP discharging intermittently?
Upstream pressure fluctuations
96
Where is the hair and lint strainer on a swimming pool system? And what does the protects what
Located on the pump suction to protect the pump
97
What is the maximum size fixture drain that may be connected to a wet vent?
2 inch
98
What is the maximum and minimum trap arm length of a 4 inch unvented floor drain?
A 450 mm minimum and a 9.8 m maximum
2.5.1.1 sentence (3)
(3) A trap the serves a floor drain need not to be protected ( by a vent) where
A) The nominal pipe size of trap is not less than 3”
B) The length of the fixture drain IS NOT LESS than 450mm
C) and the fall does not exceed its nominal pipe size
Question 4” pipe - 450mm minimum 2.5.1.1 - maximum 4” pipe minumum grade 1/8inch per foot 4 devided by .125= 32ft =9.754 m!!!
99
What is used to remove condensation from a gas piping system?
A drip pocket
100
Where may a direct fire make up air unit not be used
We’re sleeping accommodations is provided
Make up air unit could produce carbon monoxide and the people sleeping could be die.
101
What is the name given to the process that is used in water softeners
Cation exchange
102
What is the main consideration when installing a gas-fired water heater?
Clearances, venting requirements, and air supply requirements
103
What is used to maintain the spacing from the wall on a wall hung water closet
Backing washer
Think of carrier installation prosses- large 5/8ths rods exceed through carrier attachments into the room for support connections for the water closet. You put a nut than a washer on to the rod before the toilet goes on and the washer is set by the nut a 1/16th of an inch past the wall giving you spacing of the toilet
104
A bubbler is found on what
A drinking fountain
Makes the flow of water coming out to trickle made so people can drink
105
What type of backflow preventer is required at a marine facility?
RPBA
106
1 L per second equals how many US gallons per minute
15.8 US gallons per minute
1l/s = 60L per minute divided by 3.8 liters per us gals
= 15.8 us gallons
107
How many fixtures units does 1 L per second equal
31.7 fixture units
108
1 gallon per minute equals what amount of fixture unit
2.38 fixture units
1GPM = 4.54/min divided by 60 sec/in minute
= 0.0757L/sec x 31.7= 2.39 Fixture units.
109
What could be the result of calcium buildup in a boiler?
Restricted flow, reduced heat transfer, higher fuel bills
110
What should be checked first if the zone of radiant heated house wasn’t getting heated
The zone valve motor
111
Copper tubing installed to convey medical gases must what
Be brazed with BcuP alloy while being purged with nitrogen
112
When a building drain or branch could be subjected to backflow how should a backwater valve be installed?
The back water valve should be “normally open” and installed either on the branch or the building drain
113
Compound leverage wrenches are used for what
Seized joints. Uses chain (style) and pipe wrench head
