JMSP #3 Flashcards
What is placed on a cold water inlet of a hot water tank to prevent cold water from being drawn from a hot water faucet
A dip tube
Electric hot water tank with immersion elements is considered to be how efficient
100% efficient
An instantaneous hot water heater has what kind of distinguishable function
It has a control valve that activates the burner when water is drawn
A baffle is often placed in the flue gas passage of a centre flue hot water tank to do what
Slow the exit of hot combustion gas gases
What would be found on a T&P relief, valve information tag
Size of valve, pressure setting, sensor length
What is the average approximate height above the floor at which a shower curtain rod for a bathtub is placed
6 1/2 feet
Stall urinals are
Installed during the roughing stage
A single trap may serve a three compartment sink if it is what
One size larger than the largest fixture outlet pipe
“TY” can be used to connect what?
A vent pipe to a horizontal branch, vent pipe to another vent pipe
The vertical water distribution pipes in a building are referred to as what
Risers
The type of copper used for a water service pipe to a building
Type K or L soft copper tube
ABS or PVC horizontal piping must be supported at intervals, not exceeding what
4 feet
What type of copper tube can withstand the greatest bursting pressure?
Type K
I am eighth band refers to a cast-iron fitting used to change direction by how much
45°
Cutting oil is used to
Act as a lubricant
In the direction of flow, what would be the proper sequence of installation of a water softener, sand filter, hot water tank and carbon filter
Sand filter, carbon filter, softener, hot water tank
Do you need flux with BCUP brazing alloy to be used to join copper tube to copper fittings?
Nope
What is the minimum sized vent for a water closet
1-1/2”
What is the most common cause of the collapse of a hot water tank
Vaccum
What does the formula “P=H x D”
Pressure formula- pressure in psi(pounds per inch)
H= height
D= density
( in the pressure formula the P is the highest on the triangle and the H & D are on the bottom)
A pipe full of water 52 feet high would produce a pressure at a point 10’ up from the bottom of approximately
18.2 PSI
52-10=42 42x0.433=18.186 psi
0.433 is the amount of PSI per ft of water head
What is the definition of force
Pressure of water times surface area
(“ F = P x A”)
What is a fixture drain
A pipe connecting to a trap to another part of a drainage system
The minimum distance between laterals in a disposal field is
6’
What is the minimum drop between the inverts of the inlet and outlet on a septic tank ( BC HEALTH ACT)
2”
When describing a tee, what is the order to be used
First the largest run, smaller Run, than the branch
Where is pipe dope applied
To the male threads only, leaving the first 2 bare
A pump that delivers a pressure of 40 psi would pump water how high
92feet
A pump that is connected to a pressure tank starts and stops frequently. This is probably due to
Water logging of the tank
A pressure tanks’s main purpose is to
Prevent cycling of the pump
The actual lift of a pump is less than the theoretical lift. this is cause by
The loss of efficiency due to friction loss
The inability for pump to create perfect vaccum
The changes of Atmospheric pressure above sea level
Some types of plumbers putty should not be used to install when?
A drain fitting in a true marble fixture
The basic function of a fixture trap is
To prevent sewer gases from entering building
The proper distance that the base of the extension ladder should be from wall is
1 foot away away for every 4 feet up
“1/4 of its vertical height”
Threaded drainage fittings installed in a vertical stack are tapped to provide a pitch of what?
A pitch of 1/4” per foot
Asbestos cement pipe is also referred to as
White pipe & transits pipe
A septic tank should retain sewage for a minimum of how long
24 hours
The maximum fall on a trap arm from the trap weir to the vent is
1 pipe diameter
Drainage pipe if 3” diameter and smaller must be graded at
1/4” per foot
The vertical distance between the trap weir and the trap dip is known as the
Trap seal depth
The minimum water seal of a Ptrap is what
1-1/2”
Which is The plumbing fixture with the greatest fixture water demand
Urinal flush valve
Lavatory
Private flush tank WC
Public flush valve water closet
Publish flush valve water closet
The developed length of a branch vent shall be
From its upper end to the farthest downstream fixture it serves ( upper end, ends at major vent)
“Developed length” means
The distance along the centre line of the pipe
Plumbing drains are designed to
To run 1/2 to 2/3 full for adequate air flow
An ordinary displacement type water meter registers what
The total flow through meter
What meter ( water meters) is considered two meters in one?
A compound water meter
The top edge of a fixture from which a water overflows is called
The flood level rim
To prevent the load of pipe is being lifted from swinging what is used
A tag line is used
The maximum surface temperature that a hot water radiant floor heating panel should NOT exceed is
80f•-100f•
On a deep well convertible jet pump, what is larger the suction line or drive line
The suction line is larger
And ejector nozzle in a deep well convertible jet pump causes water from the well to flow into the ejector by
Decreasing the pressure in the ejector Venturi
A pitiless adapter is used in conjunction with a well pump service line to prevent what
The service pipe from freezing
The pitiless adapter is located in the
Well casing below the frost line
What pipe sizes are under the the term “nominal pipe size”
1/8”-12”
This valve can modulate water temperature in a hydronic heating system
Mixing valve
Copper tubing sizes are specified by their
Nominal inside diameter
Or outside diameter
Which of the following is not a purpose of solder flux
Promote capillary action
Remove oxides
Clean pipe and fitting
Prevent oxidation of the surface being heated
Clean pipe and fittings
What tool would be used for tightening a kitchen faucet down to a counter top
Basin wrench
What is sensible heat is what
Changing of tempature of a substance without changing its state
A pipe measurement is 18 1/2 C – C of elbows if the thread engagement is 5/16 of an inch and the throw is 5/8 of an inch what length of pipe will need to be cut
17-7/8ths
A fixture for the purpose of overflow protection that does not receive the regular discharge from other fixtures, appliances, or devices is known as what
Emergency floor drain
Any liquid waste other than Clearwater, waste or storm water is known as what
Sewage
The horizontal piping included any vertical offsets that conduct sewage, Clearwater waste or storm water to a building sewer is known as
Building drain
The unobstructed vertical distance through air between lowest point of water supply outlet, and the flood level rim of a fixture or device into which the outlet discharges is known as
Air gap
Waste water with impurity levels that will not be harmful to health and may include cooling water and condensate drainage from refrigeration and air-conditioning equipment and cooled condensate from steam heating systems, but does not include stormwater is known as what
Clearwater waste
The size of branch vent is determined by a hydraulic load and
It’s developed length from its upper end to the furthest soil or waste pipe that it serves
The length of a continuous vent is determined by
Develop length from its connection with a wet vent to where it connects to a stack vent fence stack vent, header or open air
Valve that prevents liquid from flowing back into the drainage system is known as what
Back water valve
The condition that would make it necessary to use vent header on a plumbing installation would be
Two or more vent stacks
The minimum diameter of individual vent for a 2 inch trap is
Inch and a half
The minimum protection for Cross connection control used on an irrigation system that directly connected to the water supply system would be what
On atmospheric vacuum breaker
This drafting line indicates alternating positions or moveable parts or future locations of equipment or piping. What is it called?
Phantom line
In reference to wire rope clips, the U bolt portion of the clip must always be placed
On the dead end of the rope
In a closet tank, the upper lift wire is
Attached to the trip lever
Which of the following metals can be classified as ferrous
Copper
Lead
Cast-iron
Bronze
Cast iron
When you install mechanical pop-up on a basin, the pull-up rod would be best adjusted toooo
So it’s knob is between quarter inch and a half inch above the faucet body when the plug is fully open
Half inch pipe threaded correctly will have an effective thread length of what
Half inch
Annealing copper tube means
To make it soft
What is destructive to both glass and verified clay pipe?
Hydrocflouric acid
We hose and standpipe systems are installed to provide fire protection during construction of the building, they shall be installed…
As the building progresses through its construction
Copper tube used on a medical gas system should arrive on site and decreased. If on site cleaning is required, which chemical would you use?
Trisodium phosphate
What term means a pipe that connects the waist opening of a fixture to a trap serving the fixture
Fixture outlet pipe
The application for a plumbing permit, accompanied by plumbing drawings shall show a layout of the portable water distribution system include what
Pipe sizes and valves
In A case of conflict between the provisions of the plumbing code in those of a referenced document the:
Provisions of the code shall govern
Which term means the highest part of the lower interior surface of a trap
Trap weir
Which term means the vent pipe that is connected at its upper end into a vent header or is terminated in outside air, and that is used to limit the pressure differential and a soil or waste stack
Vent stack
Which term means a vent pipe that also serves as a soil waste pipe
Wet vent
The corrosivity of water can best be reduced by
Increasing the pH level
What is required when a soil or waste stack discharge from fixtures located on more than 11 stories
A yolk vent is required
Strings, hairs, rags or lint that extend over the wheel of a trap may cause loss of trap seal due to
Capillary attraction
A urinal flush tank uses the following method to effectively flush
Siphonic action
Siphonage from a flush valve operated water closet can be prevented by the installation of a vacuum breaker, which would be installed where
Between the flush valve and the toilet bowl
The trap seal refers to the vertical distance measured from
Trap weir to the trap dip
Outlets which cause pressure drops should be provided with regulating valves the type of valve most likely used here is what
Needle valve
If the pressure in a Watermain is 55 psi and a pressure of 15 psi must be maintained at a fixture in a building, which is 50 feet above the main the pressure lost due to friction in the piping between the main and the fixture must be limited to no greater than what
18 psi
If a 1 inch pipe can supply 5 gallons per minute how many gallons per minute can be supplied by a 3 inch pipe at the same pressure
45gpm
A deep well jet pump with a partially clogged jet would cause
A high vacuum reading on the suction line
The purpose of the air dome on a hand operated force pump is to
Even out the discharge
When a minus pressure is created in a drainage system by the discharging of another fixture loss of trap seal occurs by
Momentum Siphonage
A Ruffin book is used
Finding the Ruffin measurements for the fixtures being installed
How does a urinal flush tank operate
Intermittent siphon
A flush valve is commonly installed in place of a flush tank on a water closet for commercial and industrial use because
It has more rapid flushing action
Concrete pipe shall not be used where
Inside a building above ground
Piping and fittings and joints used in pressure, sewer forced main or sump pump Discharge applications shall be capable of withstanding not less than what.
1.5 times the maximum potential pressure
A shower door shall not open
Into the shower stall
A minimum trap seal is the depth of
38 mm
The minimum design rate of flow in a building sewer is considered to be approximately what
2 ft./s
The name sometimes used to describe a system of piping which carries the waste from drains of the same type(often hub drains, and or sinks) often used in meat packing plants or food processing areas is
Trade waste systems
When a shallow well pump starts it
Reduces atmospheric pressure in the drop pipe
The suction lift that a pump can produce depends upon
Power of the motor, the diameter of the impeller, the speed of the impeller and atmospheric pressure
What condition in water does not contribute to corrosion of the pipe
Calcium carbonate
The main objective of an air volume control is to
Maintain the correct ratio of water and air in the tank
Self closing faucets are used essentially to
Prevent waste of water
A lavatory should not be installed in a place that is liable to be used for washing dishes because
Food waste will enter the overflow
The tube through which water flows to refill the flush tank of a water closet discharges near the bottom of the tank primarily to prevent
Noise
What water closet bowl comes in an wall outlet type only
Blowout
A water closet tank has a tendency to drip condensation on the floor year-round. This could be caused by.
A difference between the ambient temperature of the air and the water in the tank
Which of the following fixtures would be least affected by high-pressure?
Flush valve of water closet
Shower
Bathtub
Drinking fountain
Drinking fountain
The term “lead”, in reference to chasers, is
A specified angle machine into the chaser to enable dies to start on the pipe
The lead is the WIDEST section of the die that gradually get thinner into the sealing threads. The LEAD is the beginning threads of the die
A fixture requiring 103KPA to operate is located 5 m above the pneumatic tank and pump. If 30KPa will be lost through friction, what would the minimum switch setting be?
183KPA (27psi)
If a 1 inch pipe is replaced with a 3 inch pipe the flow rate will be
Nine times as great
Excessively high pressure will cause
Noisy flow
A soil or waste pipe, extending laterally from a solar or waste stack and connecting at its upstream and to two fixture drains in one story would be called
A branch
The size of an air brake Shall be
1 inch or equal to the size of the fixture drain
2.3.3.12.
A combined sewer carries
Sanitary and storm sewage
(6)-22”x18” laboratories are to be evenly spaced between two walls 15’8” apart what is the measurement centre to centre of the lavs
31 1/4”
The pressure in a sanitary drainage system should not vary more than
+/- (1 inch of water column)
For cleanliness in public washrooms, the recommendable is what type
Elongated
If a soil or waste stack passes through two stories and has seven water closet ran into it what is the minimum permissible size of the stack?
4 inch
Of the following fittings, which one emends flow the most
A coupling
A 22 1/2
45
90
90° elbow
Every roof shall be securely connected to a leader and provision shall be made for
Expansion and contraction
Where a water closet is to be mounted to a lead stub. The length of the lead below the floor flange shall be at least.
75 mm
PVC water pipe and fitting shall not be used for
Hot water systems
Cast-iron soil, pipe and fittings shall not be used
In a water system
What would be the minimum number of fixed units allowed for a branch draining washroom with two tank type water closet two basins two floor drains, and one wash type urinal
11.5
What is the minimum size branch vent for two bathroom groups? If the vent has a developed length of 7 m?
Inch and a half
What is the maximum number of showerheads that may be served by a single shower drain
Six
Of the backflow preventer listed what is only suitable as protection against back, siphonage
DCVA
RPBA
AVB
DCDA
AVB
C.I.S.P shall not be used in
Waterlines
A relief vent is required under certain conditions when a soil waste stack changes direction vertically more than
45°
Event must terminate from a fresh air inlet no less than
There is no distance specified
A relief vent is required when more than how many fixture unit units passed a circuit vented branch
Six fixture units
A vent stack is required when fixtures draining to a stack from
More than four stories
Soft tempered tubing shall be supported a is not exceeding intervals less than
2.5M
Aluminum DWV piping shall be supported at intervals, not exceeding
Not specified
When a water test is made on a drainage system, the piping shall be kept filled with water for
15 minutes
When an air test is made on a portable water system, the system shall withstand the air pressure of at least 700 KPa for at least
120 minutes
The location and grade on a benchmark shown on a site plan denotes the
Base point from which level levels are measured
If the liquid in a trap is completely syphon due to faulty trap design, this would be an example of
Direct siphonage
According to the national plumbing code of Canada every trap shall have a minimum trap seal depth of
38 mm minimum, no maximum trap seal depth
A dime marked as “5/8 NC” would be used for threading
Mild steel rod
A standard pipe thread is cut at what angle
60°
A flow switch may be found in which systems
Hot water heating
Fire sprinkler
Hose and standpipe
A grease interceptor used as a trap for a three compartment pot sink shall be installed so that it’s vent is not more than how far away
2.4 m “8 feet“
Seals of properly vented legal traps may be broken by
Evaporation
Venting of a plumbing system is for the purpose of
Preventing trap, siphonage, preventing loss of seal by back pressure
What sort of dies are not generally used on pipe over 1 inch
Drophead
What is the process that draws solder into a joint known as?
Capillary action
What type of waste connection that would be utilized when installing a potato peeler
Indirect connection
What would be the outcome of a Hydro pneumatic water system that has an undersized expansion tank?
Pump with cycle too often
Well, there are two types of adapter, configurations used for medical gas system
Diameter, index and pin index
What is the minimum number of half-inch lines that would be needed to supply the same amount of water as a 1 inch line if they were operating at the same pressure
four
What type of water metre would be best for measuring volume at high flows?
Turbine metre
Six laboratories have to be installed in a bathroom. Each lavatory has a dimension of 560 mm x 400 mm. The laboratories are to be equally spaced between the walls that are 4.4 m apart. The outside laboratories are to be half inch the distance from the wall compared to the centre to centre measurement distance between them. If the six laboratories are dual vented, what is the centre to centre measurement between the dual vents?
1.47 m
4.4m= 4400m / 6 =733.333 m is the distance of equal spacing multiplied x 2 to find there center to center measurement
What is the minimum size of a floor drain that can be unvented
3 inch
An inch and a quarter and inch and a half and a 2 inch line all enter a sump within a building. What is the minimum size of sump vent
2 inch
What should be installed below a corporation stop to provide support for the valve and curb stop extension
A“chair“ or “shoe“
When is it permissible to interconnect a private well with a public water system?
Never
What is the minimum water seal of a grease inter?
- Mm
2.4.5.1
A grease interceptor should be sized for approximately what percent of the fixtures volume
75%
What is installed in a grease interceptor to produce Quiescent flow?
Baffles
An interceptor must be of sufficient capacity to
Allow grease to separate from the discharge
An interceptor must be of sufficient capacity to
Allow grease to separate from the discharge
When is an oil or gas interceptor required?
When spills could enter the drainage system
When would a sand or grit interceptor be installed?
When required by the city or municipality
What type of material is used in a simple acid neutralizer
Limestone
Why is it important to keep a grease interceptor as close as possible to the fixture it is serving
To minimize the temperature loss of the discharge from the fixture
Three types of grease interceptors are manual, semi automatic and
Automatic
The minimum size vent on an oil interceptor is
Inch and a quarter
Under freezing conditions, which of the following would be least likely to burst
Type K soft copper tube
Type M hard copper tube
Skid 15 steel pipe
Glass pipe
Type K soft copper tube
The recommend a pH of waterway strained into a sanitary system is what
Between six and 11
Which of the following pairs of pipe size share the same thread pitch?
1/8 inch and three-quarter inch
1 inch and 2 inch
Inch and a half - 3 inch
3/8 and inch and a quarter
1 inch and 2 inch
A sump pump inside a building must have what
A airtight cover
The minimum size vent for a sewage sump is
2 inch
Sewage sump shall discharge into what
The building drain or the building sewer
What is the maximum size for a sewage sump?
4 inch
Manually operated sewage sump shall be sized to hold sewage for how long of a time
24 hours
The discharge piping from a sewage sump shall be rated to handle
1.5 times the maximum potential pressure of the pump
How is the size of the discharge piping from a sewage sump pump determined
By the gallons per minute and head, the pump can produce
The hydraulic load of a continuous flow fixture, such as a pump shall be
31.7 fixture units per litre per second
A stormwater sump pump that discharges 2 L per second into a combine building drain will be pumping out how many litres per 15 minutes
1800 L per 15 minutes
What is the minimum recommended backflow protection for a cold water make up line to boiler system that uses a 50% glycol 50% water mixture
RPBA
What material is typically used for the construction of fixtures in detention facilities
Stainless steel
What is used to protect the bubbler of a drinking fountain from contamination?
Shield
What hot water heating system is easiest for flow balancing
Reverse return
How much expansion can be expected if 12 m of copper tubing is heated from 6°C to 45°C with a coefficient for copper at 0.000017
7.96 mm
Which piece of equipment must be installed if a space heating boiler is used to heat domestic water
Heat exchanger
What would be the correct equipment to be installed on a heat transfer unit?
A ball valve, a globe valve, two unions, event and a drain
What would be installed between a cooling fan and the fixed piping which is attached to the structure?
Isolation and balancing valves and flex connecters with unions
What is necessary to be installed on a supply and return piping to a chiller that is mounted on rubber isolation pads
Flex connecters
The purpose of the high limit on a boiler
is to Ensure the boilers safe operating temperature is not exceeded
What is usually used to prove water circulation through high mass boiler before the main burner can ignite?
Nothing
When must the tracer wire be installed with underground gas piping?
When it is made of plastic
Which of the following would be acceptable as a drain for acid waste
Copper
Ductile iron
“Duriron“
System 15 PVC
Duriron
If the water pressure to a hose cabinet is found to be too high, you would
Install a limiting orifice
When pouring concrete onto radiant slab on grade floor panel what must be done?
Maintain pressure in the pipe
When connecting a SOWS to a horizontal branch that serves a bathroom group upstream of the connecting point, the proper fitting to use would be
A wye and a 1/8 bend
