IP practice Flashcards
make up water is connected to _______
supply
finned baseboard is an example of _____ heating
convection
pipe length x temp diff x coe = ______
expansion
oxygen colour
green/white
medical air colour
black and white
how many cuft of air require to compress 1cuft of air 100 psi
100psi / 14.73 = 7cuft
what is downstream of the piston compressor
intercooler
this device is always most downstream and is an important part of compressor for medical
dryer
how many 2” pipe would it take to change from 6” pipe
2^2 = 4
6^2 = 36
so 36 / 4 = 9
shallow well pump can take max ___ft
25ft
piping downstream of reverse osmosis must be __
plastic, attached w air gap
max length of water system = ___m
90m
1) max residential water service pressure, prv needed if u go over this number
2) min is ____kpa
1) max. 550kpa (80psi)
2) min. 200kpa (30psi)
flared soft copper angle
45 degrees
the smell of poisonous rotten egg means
hydrogen sulphide
neutral ph
7
mildly acidic ph
6, below gets more acidic
mildy alkaline ph
8, above more alkaline
what removes iron
oxidation and manganese greensand
lowest amount of oxygen level to enter confined space
19.5%
what pipe cutting process is this: stay min 8” from beaded end, score pipe, then heat, tap. use stone to smooth rough end
cutting glass pipe, ends should be joined BEAD TO PLAIN
minimum size for water service pipe
3/4”
air gap minimum
1” or 2x diameter of potable water supply pipe
septic tank is inspected _____
annually
distance from septic field
- drinking water =
- property line or well with watertight casing =
- drinking water 3m (10’)
- property line, well with watertight casing 30m (100’)
distance from septic ______
drinking water/building drain = 1m (3ft)
property line = 15m (50ft)
septic tank
2 boilers working together must have
their own components
pressure vacuum breaker is installed ____ inches above flood level
12”
rpba = min ____ in off ground
30inches off ground
device installed in the hot water supply main near the heating source, to separate and direct air to cushion tank or automatic air vent
air scoop
hot water boiler, minimum ___” relief valve with ___ psi, max temp _____ F
relief valve rating?
3/4” relief valve with 30 psi, max temp 250 degrees F
(note: low pressure steam boiler is half of these values)
100%relief valve rating
hard hat liners are changed every
year (annually)
note; class A has voltage protection
hard hats are valid for ___years
5
___ ft or more requires shoring
4ft
lanyard =
5ft
tap top of head
mainline
tap bottom of elbow
whipline
foresight is ____ elevation
backsight is ____ elevation
foresight is unknown
backsight is known elevation
to lengthen flushometer flush turn screw
clockwise
to shorten flush turn screw counter clockwise
1) to find max trap arm length multiply diameter” by __ , assuming 1/4”per foot grade
2) min. trap arm length?
1) 4
2) minimum length of trap arm is 2 pipe diameters
scaffolding required at ____ft
10
how many decibels until you need protection
85db
guardrails at
42 inches above working platform
t&p valves located within top _____mm of tank and temp rated at _____ deg C
150mm
temp rated at 99 deg celsius
purpose of a wild loop
prevents pump from dead heading
device installed above compression tank
line scoop
location of circulator
on the supply downstream from compression tank, flow switch comes after these
circulator transfers energy by
impellers
distance in feet x grade in fraction of an inch =
1m is 3.28f
total fall in inches
note: if TF and distance are in feet grade is in percentage
H’ x 0.433 =
xPSI per feet of head
area in sqin x psi =
TF, total force
type of copper for baseboard heating
type M
Formula for volume
d^2 x 0.7854 x h
exclude the h if u want to get area
1 ton of refrigeration =
12,000 btu’s
after cleaning a septic tank, as its refilling sludge(bottom layer) starts to rise, what is the problem
too little bacteria and undersized tank
well pump turns on as soon as faucet is used, what is the problem
waterlogged pressure tank
cold caulked joints in a drainage system should be packed w oakum and tightly caulked with cold caulking compound to a depth no less than ____mm
25mm(1”)
dishwashing sink and food prep sink shall NOT have
concealed overflows
dischrage piping from service water heater’s temp and prv must discharge within ____ of a floor drain or suitable area
also: underground piping installed in a dug trench should be covered with backfill to a heigh of ____
300mm
if 4 shower heads are installed along a wall what would the min measurement be between the two outermost heads
3 spaces, each space is 750mm, so 750 x 3 = 2250mm
a 4-wire zone valve is wired to
thermostat, transformer, end switches
a twin tank water softener will house the brine in one tank and the other tank will house the ____
zeolite
water that has a dissolved mineral content greater than 181 mg/L would be deemed
very hard
reason why water is red after softener
insufficient backwash
laterals in a septic field runs ____
level, no slope
if trench walls are required to be slope, what is the slope
4:3
4 horizontal
3 vertical
when pouring concrete in on in floor radiant heating pipe, what must be done to the pex
have air in the pex and pressurize it
hydronic system that is the easiest to balance
first supply last return
reverse return system
Max develop length of a fixture outlet pipe in Canada
1200mm
min. size supply pipe to hwt serving 1 fixture
1/2”
if it serves 2 fixtures 3/4”
class b fire extinguishers are used on what
d?
c?
flammable liquids
class d = metal c = electrical components
what type of copper is used for underground water distribution
type k soft
backwater valve installed on a building drain is normally ___
open
a gear pump is a positive displacement pump and must be installed with a ___
pressure relief valve
where is the jet located in a deep well
above the foot valve
what formula is this ( (area of leader) + 0.5 (area of wall) ) x rainfall intensity
rw leader w wall in litres
what formula is this: (length of pipe / 10) x what the graph says using temp change of xpipe
expansion
changing cont flow to fixture units calculation?
to litres calculation?
xL/s x 31.7 = fu
xL/s x 900 = Litres
which vents need a develop length from most distant soil or waste pipe connection
branch vent - towards a vent stack stack vent, vent header or outside air
vent header - towards outside air
which vent need a develop length of the horizontal or vertical soil or waste pipe connection towards a stack vent vent, vent stack, vent header or outside air
circuit vent - horizontal
continuous vent - vertical
length is not a consideration when sizing this vent
relief vent - one size smaller than circuit vent
which manufacturing method produces the strongest pipe
extruded
a ground source heat pump is installed (geothermal). what do u need in the boiler room
buffer tank
what is it called when u pour concrete in stages
lifts
what is required when u install a downfed hydronic fintube
vents on high points and drains on low points
if u had to remove a toilet and then put it down again after u have raised the floor what would u use
wax horn or flange extension kit
valves used on domestic hwt supply and heaters include
pressure, temperature and vacuum relief valve located within 6” above the tank
min. radius for a bend of pipe
diameter x 6 = min radius bend
when gluing 2 inch diameter or less pvc do u need primer
you dont need primer for 2inch or less pvc
which pump voltage will provide the most energy efficiency
240 line voltage - voltage is high and it must be LINE voltage
min floor drain size
2”
what is blackwater
toilet only waste
colour of non potable water piping
purple
max trap length connector (tail piece) allowed when a fixture has a supply pipe of 3/8”
750mm
air break minimum
1” min. or 1 x diameter of non potable pipe
low pressure boiler minimum of ___” prv that discharge at ___psi. Max temp is ___
1/2”, 15psi, 250 degrees F
what is the process when flaring copper
cut, ream, nut, flare
discharge from a sump pump shall have the following fittings in order, in the direction of flow
check valve, union, shut off valve
turning the adjusting screw CLOCKWISE on flush valve will
close the chamber and give u a longer cycle
COUNTERCLOCKWISE will shorten cycle and open chamber
if flushvalve has continuous flow or the flush is too long it could be because
opening chamber is plugged or you have a ruptured diaphragm
fixture unit is 260 or less, load is ____L
if it exceeds = # of fu x ___L = xL
2360L
9.1L
hwt is set to ____F minimum , max hot water that discharge into drain is ____C
140 degrees F minimum, max is 99 deg C
75 degrees C to drain
how to change xF to celsius and vice versa
(xF - 32) / 1.8 = xC
(xC x 1.8) + 32 = xF
Max bath/shower hot water temp
49 degrees C or 120 degrees F
flow control valve (check valve) is installed on ____, they prevent convection currents in a heating system
supply
a zone valve installed backwards =
water hammer
this device is downstream of the circulator, proves circulator is on and turn on the burner
flow switch
the best location to get air out is where water velocity is ______ and temp _____
water velocity LOWEST
temperature HOTTEST
this device is a lift check installed on the supply, upstream of the circulator and cuts off water until a call for heat
flow control
sling configuration that lifts the most capacity
basket sling with 2 vertical legs
minimum ground cover for underground gas piping
375mm
when does a spring loaded inline trap primer deliver a spurt of water to the trap it is serving
when the faucet through which it is supplied is opened and closed
correct installation of a thermal bulb (aquastat proportional controller) on a chilled water system
install in a thermal well with conductive paste
downfed hot water unit heater requires 2 isolation valves, what are they
isolation valves for drain and air vent
geothermal heat pump in residence requires ______ hwt that are gas or electric
domestic
