All Multiple Choice Questions Flashcards
How would a tagline be attached to a pipe?
By a clove hitch with 2 —- 1/2 hitches
Devon
Sheet bend ( ties two ropes together of different lengths) “oh sheet these ropes are two different lengths” use sheet not
Reef knot is for two ropes if the same length
Timber hitch — fuck —
When a well pumped in a low yield well cannot meet the demands of the house. What is a possible solution?
Install a cistern
How would you pipe a gravity septic field on sloped ground in order to ensure even flow distribution of effluent?
Install laterals across the slope at similar depths (perpendicular)
If workers are required to enter a trench, that is over 4 feet in depth, a safety point of entry and exit must be provided with how many feet of the work
25 feet
What’s the maximum length of a lanyard?
3 m
A water heater with a working pressure rating of 150 psi must have a TMP relief valve set at what
Max 150 psi
What is the purpose of a TY at the outlet of a septic tank?
To help vent the discharge of influence
What is the main advantage of a two line pipe drawing over a single line pipe drawing?
More representative as it’s drawn to scale
How can a crack in cast-iron be found before pipe is installed?
“Sound it” ( they’re talking about the sound. It makes when you bang it on shit.)
When checking locations for canning sleeves in slabbed, what should be used for reference measurements?
Grid lines
On a wall that is 5.4 m long what is the maximum number of evenly spaced showerheads
Seven
From the following, which is not a method of controlling a DHW recirculating pump.
A. Pressure switch
B. Aquastat
C. Normally closed switch (content flow)
D. A timer.
A- Pressure switch
What is another term for “T drilling?”
_____ Tees”
Extracted tees
The tool used for packing Oakham is a what
Yarning iron
Memory
Yarning = packing
Looks like scrapper for drywall missing
The tool used for packing the lead tightly against the INSIDE of the hub is called
Outside iron
Memory
Outside iron = inside hub
The tool used for packing the lead tight AGAINST the pipe in the hub is a
Inside iron
Memory
Inside = against
What is the volume of a cylinder that has a diameter of 1 m and a height of 800 m
0.628 m³
Where is the vacuum breaker located on a mop sink?
On the spout
What is the purpose of the threaded tapping on a well head cap
To attach a vent
Where is the lowest point of pressure on a two pipe deep well jet pump installation
The impeller eye
What would be a reasonable remedy for water hammering in an old house
Add extra fasteners to the water pipe
What is the minimum amount of free board in a septic tank?
12 inches
What is the purpose of free board in a septic tank?
To allow the accumulation of scum
What is the minimum size supply pipe to a urinal flush valve?
Three-quarter
What is the advantage of a compound leverage wrench over a straight pipe wrench?
It takes less effort to turn the pipe
How is the water added to a cooling tower?
Through a RPBA and an air gap
A jet pump does not produce enough pressure. The simplest solution would be what.
Increase the cut and cut out setting at the pressure tank pressure switch
An unfed gas supply to a unit heater requires
A shut off and a union
What is the direction of unit heater should face when installed in the garage with overhead doors?
Down towards the door from above and beside the door ( what in the fuck)
When installing an irrigation system, one of the most important layout criteria is what
Sunlight
What is installed with a water metre to prevent settling?
Meter shoe
What is annular spacing?
The airspace around the pipe
A flush valve activates when a person walks past a urinal what is the solution of this?
Adjust the auto flush valve sensor
A gas fired heating unit is installed on a roof. How is the pipe supported?
Pressure treated wood blocks
An RO system works better with What kind of water ( think of water treatment shit)
Neutral water on the pH scale
How would you change the fill level on a flush tank for water closet?
Adjust the metering screw
Where is the cleanout located on a recessed grease interceptor
Immediately downstream of the interceptor
The five psi differential pressure test on a medical gas system is
A cross connection test
When should a manhole be provided with vent?
If located within a building
A man hole shall have a minimum base dimension of what (in meters)
1 m, except at the top 1.5 m may be tapered from 1 m down to a minimum of 600 mm at the top
When installing a chiller, spring isolators would be used for
Vibration dampening
Flow control roof drains may be installed provided
There is at least one drain for every 900 m²
2.4.10.4 sentance (e)
When a centrifugal pump is added in series with another of the same size and model, what will happen?
The pressure output will theoretically double
When a centrifugal pump is added in parallel with another of the same size and model, what will happen to the flow?
The flow rate will theoretically double
What is the specific weight/gravity of natural gas?
0.6
The chemical symbol for natural gas is
CH4
A barrier free water closet insulation would require centreline of the water closet bowl to be how many millimetres from the side wall
450 mm (18”)
A sewage treatment plant would require which minimum backflow prevention for the water service
RPBA and air gap
A radioactive nuclear plant would require what minimum of backflow prevention
RPBA and air gap
What backflow preventer could be installed in an area subjected to flooding provided their test costs were plugged
DCVA
A circulator for a hydronic heating system would be installed where on the system
Pumping away from the expansion tank
The drainage hydraulic load on a 2 inch floor drain in a washroom would be what
There is no load
The cushion tank in a hydronic heating system must be sized to allow for approximately what percent of expansion of water
4%
Salty tasting water is drawn from the tap of a fixture in a rural water system with a water softener. What is the probable cause?
The rinse cycle is too short
A t&p relief valve sensing element must be located so that the sensing element is where
Located within the top 150 mm of the tank
A flow switch use in fire protection system serves what purpose
To detect water flow and activate an alarm
The minimum air brake for a three-quarter relief valve drain from a T&P relief valve is
1 inch
To complete burning one cubic foot of natural gas require how many cubic feet of air
15 ft.³ of air
A zeolite is found in what device
A water softener
What is the maximum length of a fixture supply tube?
750 mm
When approved, the best location to connect a fire sprinklers supply main to a water main in a building is
Upstream of the water meter
What is the maximum distance between cleanout on a 4 inch building drain
30 m
The flood level rim of a barrier free water closet is what
450 millimetres
18”
What is the maximum number of showerheads on a wall 6000 mm long if the spacing between them is equal and there is only one drain in the room
Six
2.2.2.3 sentence (2)
This type of pump would require a vent to remove air from the pump casing before running the pump. What type of pump is it?
Centrifugal
When is a pipe saddle used
Stop roller hangers from damaging pipe installation
The minimum natural gas pressure supplied to a domestic gas fired hot water heater is
4 inches of water column
When reading a Philadelphia rod in imperial measurements and the rod reads 5.6 the number six stands for what
7.2 inches
What colour is used in the label for medical gas oxygen lines?
White background with green lettering
What colour is used for labelling on a medical air line?
Either black background with white lettering or a white background with black lettering either or is correct
What colour is used for the label on a medical vacuum line?
Yellow background with black or silver lettering
The minimum distance between a side sidewall and a centre line of a barrier free water closet is
18 inches
What colour is used for the label on medical gas nitrous oxide line
Metallic silver or white lettering with blue background
The approximate distance between the non-grab bar wall or partition in the centre line of the barrier free water closet is what distance
42 inches, 1050 mm
Remember- the minimum size of a handicap stall is 1500mm and the toilet has to be installed 450mm from the other sides finished wall
What is the most often used hot water heating system in apartments?
Baseboard Wallfin system
If an air vent is required in a location that is hard to access a hot water heating system. What type would you use?
Automatic vent
When there is a low pH level in a boiler, what would you add?
Caustic soda
Which one insulated on a commercial hot water system the supply or the return?
Both! big surprise
What regulates the volume of a flow on flush valve
Wall stop
What is the minimum temperature that a dishwasher has to be to kill bacteria
180°F
What type of backflow preventer is on a service sink?
AVB ( atmospheric vaccume breaker)
At the bypass on a flush valve is totally plugged, what would be the outcome?
The valve will flush continuously
Where are the backup nuts located on a wall hung toilet
Between the wall and the bowl
How are wall hung carriers adjusted to compensate for varying wall thicknesses
By the use of an adjustable nipple
What type of toilet bowl is not allowed to be installed?
Wash down toilet bowl
If a flush valve urinal was noisy and splash water over the rim when flushed what would you do?
Adjust the control stop to decrease the flow
If a grease interceptor is used as a trap what is the maximum length of the trap arm?
Based on the outlet diameter at 1 to 50 ratio of grade
What provides the closing forces of a solenoid valve used in a water system?
Inlet pressure plus spring pressure
What type of plastic are both ABS and PVC categorized as
Thermoplastic piping
What type of copper can be obtained in hard temper only?
DWV copper
What is the valve called on a city Waterman?
Corporation stop
What is the weakest type of weld can be welded pipe
Continuous welded
What is the maximum working pressure of sch. 40 pipe?
150 psi
How is copper tubing annealed?
By heating to annealing temperature
Which of the following is a non-makeup joint
a. Hub spigot
B. Socket welded
C.Hubless cast-iron
D. Copper sweat.
Hubless cast iron (C)
What is used to join copper to galvanized pipe?
A dielectric fitting
A toilet is to be reset in a newly renovated bathroom that is recently had a new subfloor and ceramic tile installed. What would The Plumber do?
Use a sponge foam gasket
When soldering a copper joint which steps shall be taken?
Clean the surfaces,ream, use flux as required, wipe the surface of all residuaes
When joining concrete pipe what surfaces require lubrication
Pipe end and gasket
Calculate the total length of a hydronic baseboard required for the following installation. The room is 20’ x 30’ heat loss equals 15 BTUs per hour per foot squared the baseboard rating is at 500 BTUs per foot.
18 feet
What high temperature heating unit would be utilized in a kitchen with no available wall space
Kick space fan coils
High temperature boil operate at 250f•
With no wall space kick space fan coils are the only thing capable of handling 250f•
( with the options givin in question )
When a water service is installed in corrosive soil, what type of piping should be used?
Piping suitable for the application
The best location for an air scoop on a cooling system is the area of
The lowest pressure and highest temperature
Now, how should a septic header be installed?
Installed flat without grade
If a water service is installed in the same trench as a sanitary service, how should the waterline be placed?
Beside and above the sanitary service
What does UV water treatment remove
Bacteria
Water backups into a building discharge system during a heavy rainfall. What should a plumber check first
The back water valve
A jet pump has too much clearance between the impeller and the volute. What would this cause?
The pump to not shut off
The excess room in the pump will have the water be able to have some water remain in the pump and pressure and flow will be decreased and not able to meet demand and the pump will not shut off.
When bending a pipe to 90° using a hydraulic bender when should the operation stop?
Just after the 90° mark
When do you remove the restraint banding of an expansion joint?
After testing
When testing stack with an expansion joint the pressure during the testing , banding will be strapped around the expansion so it will not fully expanded
What fixture could indirectly act as a trap primer?
A drinking fountain
What pressure should a domestic water pressure tank be charged to
2 to 3 psi below the cut in setting
What is the purpose of a receiver tank on a compressed air system?
Reducing cycling of the compressor
If a deep well, jet assembly must be lowered in a well what other consideration is required
Adjust the control valve
Adjusting the control valve is nessasary to control how much water comes through the drive line. The drive line sprays water through the Venturi creating a negative pressure with in the system. The control valve controls the amount of water in the drive line.
An RO unit is experiencing a low outlet pressure what would be the cause?
The membrane is plugged
What type of water do RO units work best with
Warm water
What is used to regenerate an iron filter that is used for domestic water systems
Potassium permanganate
Potassium permanganate is for a green sand manganese filter. The Potassium permanganate REGENERATES the sand manganese filter.
What must be done to the downstream piping of a RO unit after installation?
Disinfected and flushed with product water
Aside from hardness what does a water softener remove?
Iron
If two pipes connected to a deep well jet assembly and one of them is 1-1/4” suction line what would the driveline be in size?
A 1 inch driveline
Your drive line is always one NPS
The drive line is the line bring water down to the Venturi and the suction line brings water to the pump.
How is the flush affected? If the bypass orifice screwed on a water closet flush valve is partially blocked
The flesh length will be longer
The bypass is the small orifice that lets water get in and above upper chamber that shuts of flow to toilet. (Within The flush valve) the flush will be longer because it takes longer to shut the valve off.
How many urinals may be flushed by a direct flush valve?
One …
What would be required to braze a 2 inch brass MIP adaptor onto a copper pipe
Brazing high temperature flux
When brazing BRASS on to COPPER
“ when brazing dissimilar metals (brazing is at 1100-1400f• ) that’s when you would a high temperature flux”
How do you adjust the temperature of a water delivered by a pressure balancing valve
Adjust the limit stop
What is the best way to increase the volume of water flow through a distribution system?
Increase the pipe size
If a new section of copper is being added to a medical gas system, how are the ends of the copper cleaned?
With open mesh abrasive of cloth
What part would need replacement if a pump was leaking between the motor shaft and the pump body?
The mechanical seal
A bottle used to collect a water sample from a private water system should be
Sterilized and sealed
The pressure at the discharge of a submersible pump is directly related to
The number of impellers within the submersible pump
What would be an indication that an area isolation valve for a medical gas system has been closed
There will be alarm sounding, the valve handle will be 90° to the piping, the plexiglass cover for the valve will be off and cannot be replaced
The area shut off for a medical gas system would be what type of valve
A full port ball valve
Where is the best location for hydronic heating baseboard wallfin
On outside wall underneath a window
How much pipe would be saved on a 6 m offset of 45 elbows were used rather than 90° elbows
3.52 m
What would be the minimum size for a sleeve through a concrete wall if it is to allow for a 3 inch inside diameter pipe that has a W.T.of 5/16, with 1 inch insulation and a half inch annular spacing
6 5/8”
What is the primary substance found in hard water?
Calcium bicarbonates, and magnesium sulphate
How far away should the tool rest be from the face of the wheel on a bench grinder?
1/8 of an inch
Bench grinder is the table mounted 2 wheel grinder seen usually in a work shop. The tool rest is the place you rest the material that is being grinned down. The gap between the tool rest and the grinder wheel is 1/8th of an inch maximum.
What method of joining copper waterlines underground is unacceptable/prohibited
Soldering
What is the proper height that a urinal should be set at
At the average height of the people using it
What type of gauge is used on backflow assemblies for testing?
A differential pressure gauge
Which tool would be used to cut 2 inch and smaller steel pipe on a tri stand
Single wheel pipe cutter
How can hard temper copper tubing, be bent?
It can’t…
What is the term given to the practice of suspending multiple pipelines together
Trapeze hangers
Trapeze hangers is just unistrut.
Which code covers the requirements for fire stopping within a building
National building code
Which situation would require the installation of a pump rather than a syphon in a dozing chamber of a septic tank
If the disposal field is at a higher elevation
What is the purpose of a baffle or tea on the outlet of the septic tank?
To retain scum in the tank
How can underground pressure piping be protected from separating other than the use of thrust blockers?
Continuous rodding
Continuous rodding is when the fittings of the underground piping and fittings are bolted together from rods exceeding through each fitting connecting to the one adjacent to it. It is than bolted together so there so that that they are protected from blowing apart
What is typically required on a water distribution piping supply for supplying each floor of a high-rise building?
A pressure reducing valve
What piece of piping equipment is also required when booster pumps are used in a water distribution piping of a high-rise
An expansion tank
How much expansion would take place in 300 feet of copper tubing if it’s heated from 70°F to 180°F and the C.O.E.for copper is 0.0000095?
0.3135 feet
Which of the following items would be required to be installed for a dowfed heat transfer unit
A. isolation valves and a drain
B. Unions and a manual air vent
C.isolation valves in an automatic air vent
D manual air vent and drain.
A. Isolation valves and drain
What is the characteristics of water that a reverse osmosis system won’t affect
Bacteria
In the direction of flow, what would be the installation sequence for a water softener, sand filter, and carbon filter
In direction of flow sand filter, then carbon filter and lastly, a water softener
How should a float switch be wired to a pump supplying water to a cooling tower?
In series with an upstream of the pump
Which of the following would be of most importance as a consideration when determining the location of the boiler
A.the piping route
B.the venting route
C.the wiring route
D.the gas piping route
The venting route B.
On a day-to-day basis, what simple task would prevent cross connection when installing medical gas piping
Labelling the piping as it is installed
What safety device is installed in an electrical circuit to prevent access amperage draw from a pump
A circuit breaker or fuse
If a pump has a total head of 235 feet and a suction head of 18.25 feet. What would be the discharge head?
216.75 feet of head
What is the most likely cause of low production flow from an extending jet pump?
A leak in the suction piping
What would be the result of a leaky foot valve on a jet pump installation?
The pump comes on occasionally without a demand on the system
What would be the first indication that the thermostat on an otherwise properly operating electrical hot water heater was faulty
The TNP relief valve would trip
What is used to join “duriron” pipe together?
Mechanical joints or clamps
Which of the following types of discharge may be used to prime a trap
A. a laundry tray
B.a sterilizer
C.a deli display case
D.a drinking fountain
D. A drinking fountain.
Which of the following may not be used to prime a trap?
A. a T into the outlet of a direct flush valve to a toilet
B. a T into the vertical line feeding a showerhead
C. the drain from the ice bin of an ice machine
D. a T into the fixture outlet pipe from a laboratory
D.
A tee into the fixture outlet pipe from a laboratory
The discharge from a clothes washer would be termed into what kind of waste ( sewage, clear water, grey water. ECT.)
Sewage
What is the maximum length of a fixture outlet pipe into a grease interceptor?
1200 mm
What is the term given to a second area of a floor drain body that can be drilled and tapped
A boss
Flow from which one of the following could be used to prime a trap
A. A TNP relief valve
B. A shower drain
C.a shower showerhead
D.a basin
C.a showerhead
If sewage contained discharge that may impair the sanitary drainage system what must be done
It must be properly treated before entering the drainage system
How must vent from a stump be terminated?
As you would any other vent
Where is the discharge from a sewage sump supposed to terminate?
Into the building, drain downstream of the building trap
2.4.6.4 sentence (6)
If a copper tube was supported by a steel hanger, what would be the result?
The steel hanger would be damaged only in the presence of electrolyte
How is water stored that has passed through an RO unit in a residence
It is stored in small quantities for limited use
What is the underlying reason for the 24 hour clock used on a water softener
It has to regenerate soft water every three days, a.m. and p.m. Settings are prone to being mixed up when setting the clock, so that there is consistency between softener manufacturers
How is the steam main installed in a steam system?
Graded down and away from the boiler at 1 inch/20 feet
On what principle does a float trap in a steam system work?
The differences in density between the condensate and the steam
How does a mechanical steam trap operate?
It senses the difference in tempature between water and steam
A low pressure steam boiler has an operating pressure that is set at 5 psiG below the maximum allowed by the A.S.M.E code the pressure troll has a differential of 4 psiG what is the cut in pressure?
Six psiG
What is a spool drawing?
An isometric drawing of a part of a pre-fabricated piping system
What is a wraparound used for?
To make a square straight, cut around pipe
What is a “thread o let”?
A threaded branch welded into a steel pipe
Similar to a saddle BUT the hold is drilled and than the threadolet ( looks like a Victoria saddle with out the bolts or clamps, “the threaded portion”) is put in place and than WELDED
What type of cutter Wheel is used for cutting ABS pipe?
A large diameter wheel for a large pipe and a small diameter wheel for small pipe
What is the smallest size drain pan outlet for a three-quarter T&P relief valve
Inch and a quarter
2.6.1.7 sentence (10)
Also 1-1/4 is the smallest drain allowable for drainage
When attaching wire rope clips to create a loop, which clip is installed first
First, the farthest from the thimble, then the nearest one then the middle one
What type of coupling would be used when attaching a cut glass pipe to a glass fitting
a plain to bead coupling
What do you do to a coupling for glass piping to prepare for installation
Wet it with water
Where is a buffer tank used?
In a ground service heating system
The geothermal manifold is underneath the ground taking heart from the earth and transferring the heat through the refrigeration cycle to heat the water. The water is than stored in a buffer tank to reduce cycling of the pump.
What is the minimum size blow down for a steam boiler?
Three-quarter inch
How many US gallons per minute is 3.5 L a second
55.4 US gallons per minute
What would this formula apply to: “ G.P.G x G.P.P x 3 days
When sizing a water softener
How many PPM is 2 G.P.U.S.G
34.2
How would a vacuum pump for medical gas systems be used
On an intertia base with flexible, piping connections
What is the maximum allowable temperature to a bathtub?
49°C
A domestic hot water tank filled with water is at a temperature of 50°F. If the target temperature is 60°C how many degrees Celsius must be added.
50°C
The elevation of a reference benchmark is 110.366 m a backside reading of 1.936 m is taken and the foresight reading on the floor drain is 2.442 m. What is the elevation of the floor drain?
109.860 m
A water softener system is installed along with an iron filter what would be the probable cause of iron occurring in the house water along with a reduction of flow
A malfunctioning iron filter and a plugged resin bed
If a shallow well pump requires 20 feet of lift and 40 psi is needed at a pressure tank what is the minimum total lift required?
112 foot minimum lift
What would be the cause sugaring on the inside of a stainless steel weld?
Not enough purged gas flow
If a submersible pump was set at 400 feet below ground and discharging through a poly drop pipe. How would it be supported?
By a cable
How should asbestos pipe be cut out when using a power rotary cutter?
At low speed and wet pipe
How should concrete pipe be cut when using a powered rotary cutter?
At high-speed and wet pipe
What is the proper order of steps taken to replace the spring coupler in a three-piece circulator?
Turn off the power disconnect motor loosen set screws replace coupler
A hydronic heating system contains 200 L of solution which is 70/30 water/glycol how much of the solution must be drained in order for enough 100% glycol to be added to bring the system to a 50-50 ratio
57 L
200 X 20% (glycol added) /70 H20
What type of drain assembly is installed on a barrier free wall hung basin
Offset P.O.
What is the differential pressure setting on a one post pressure switch for a pump?
20 psi
A class a fire extinguisher is used on _______ and contains _________
Combustible materials and contains water
When using a low velocity power actuated tool the device fails to fire when the trigger is pulled what should you do first
Keep the tool in position and wait 30 seconds
How many 2 inch pipes does it take to equal the volume capacity of one#
6inch pipe
9#—- 2inch pipes needed
When using oxy fuel, welding and cutting equipment, what does a flashback arrest your protect the operator from?
Flames travelling back into the hose
How often must a horizontal piece of 3/4inch type M copper be supported
Every 2.5 m
What would water with a PH of 5.5 be considered
Mildly acidic
Which of the following would be allowable for underground water distribution?
A.type M soft
B.type L hard
C.type K soft
D.type DWV
C. Type K soft
Which of the following is not approved method of joining cast-iron waste pipe
A. a compression joint
B. Welded joint.
C.a mechanical joint
D.a chaulked joint
B. A welded joint
What is the purpose of a dielectric union?
To prevent corrosion
If one end of gas pipe needs to be cut out what type of coupling should be used?
Bead-to-plain
How is a bell and spigot pipe installed?
With the bell upstream
What seals a lead and Ockham joint
The Ockham
What is a running rope
Is it a way of supporting/helping lead and Olkhum joint during the installation of a horizontal joint. The rope wraps around the pipe, attach to the rope there is a clip that can attach to the END of the rope to keep rope tight around the pipe. Those keeps the lead from leaking out of the joint.
