Foundations Study Package Two Flashcards
What does ULF stand for?
Ultra Low Flush
What does the schedule number on a pipe indicate?
The wall thickness
What abbreviation indicates the thinnest wall section for black iron pipe?
Std.
Which of the following is a non-ferrous metal?
stainless steel, duriron, wrought iron or tin
tin
If a sewer is installed at a 1% grade, the grade would be approx. ___ if expressed as a fraction of an inch /foot.
1/8”
The radius of a circular tank is 21 inches. What would its circumference be?
P=2(pie)r
11’-0”
What is the effect when a water line is reduced in size while the rate of flow is maintained?
There will be an increase in velocity and a reduction in pressure
A hot water tank, under pressure of 75 psig has a faulty thermostat and continues to heat. If the T & P relief valve was also stuck in the closed position, what would the result?
The pressure would increase while the temp. rises to more than 212F
What is the class designation of a fire in a combustible material such as paper or wood?
Class A
What is considered a Class B fire?
flammable liquid
When opening a faucet, a chattering noise is heard. What is the most likely problem?
The washer is loose
The operation of diaphragm and piston type flush valves is governed by what?
Total force
question 13 math problem
How many BTU’s are required to raise 6 pounds of ice from 14F to water at 70F?
(latent heat and specific heat calculations)
1146 BTU’s
When 1 cubic foot of water turns into steam, what would be the new volume steam would occupy?
1728 cubic feet
12x12x12
question 16 math problem
If a reservoir is located 240 feet above the mains in a town, how much pressure would exist in the mains?
104 psi
A plumber requires (24) - 6” diameter sheet metal sleeves for running pipes through masonry walls. If each sleeve is 18” long and 1” is required for joint overlap, how many square feet of sheet metal are needed?
60 ft2
A nominally horizontal pipe is any pipe graded to what?
less than 45 degrees with the horizontal
What is the pressure in a gravity domestic water system provided by?
The height of the water storage tank
If granite has a specific gravity of 2.7, what is its density?
168 lbs/ft3
What is the weight of a steel bar 6’ - 6” long and 1” square if steel weight 449.28 lbs/ft3?
20 lbs 4 ½ oz
Complete the following statement: “The fire department connection for a sprinkler system…”
Is used to supply water to the sprinkler system inside a building
What would be done in order to increase the pressure downstream of a PRV?
Turn the adjusting screw clockwise
Question 25: math
Question 26: math
What is the purpose of the hole in the reamer blade of a No. 10 Ridgid pipe cutter?
To open or close a “B” tank
Complete the following sentence, “ A body or object immersed in a fluid is buoyed up by a force equal to the… ”
Weight of the liquid displaced
What is 10 ft head of water equal to?
4.33 psi
What would be the pressure in kilopascals at the bottom of a storage tank 4 meters high?
39 kPa
At what temp. is water at its max density?
39 F
What does a cubic foot of water weigh?
62.4 pounds
A pipe is 84 feet long / graded at 1” in 20 feet. What is the total fall?
4.2 “
A pipe drops 16 inches over its length of 225 ft. What is its grade as a percent
.59%
What is the total fall of a sewer installed at 1% grade?
12 inches / 100 feet
A pipe is 145 ft long and is graded at rate of 2 ½ %. What is the total fall?
3.625 ft
What is the standard measurement from the finished floor to the centreline of the waste outlet for a lavatory?
18”
What is the standard measurement from the centreline of a tank type toilet to the centre of the water supply?
6”
2 sleeves must be set in concrete slab for 2 - 12” rough in toilet bowls installed back-to-back. If the partition wall is 5” hollow tile and the wall finished is ¾” plaster, what is the C-C distance between the sleeves?
30 ½”
How many BTU’s are required to raise the temp of 40 Imperial gallons of water from 60F -→ 160F?
40,000
What is a pipe that is installed at an angle of 45 degrees with the horizontal?
nominally vertical
Compared with a grade of 1/8 “/ft, what is a grade of 1%?
(is it more or less)
Slightly less
What is the effect of high temp (165F and over), soft water on copper water lines?
The rate of corrosion is increased
What does a pH test of water determine?
the acidity
What is the max length of a water closet arm?
4m
How much expansion would occur on a 450 ft steel pipe installed at 45F and operating at 200F (C.O.E = 0.0000067)
.4673ft
5.6076”
5 5/8”
All of the above is right
What would be the weight of liquid in a tank 1741 mm long by 1432 mm wide by 211 mm deep, if the liquids specific weight is 0.94?
494 kg
Calculate the number of litres in a water storage heater that is ¾ full of water. The tank is 1.32m high and has a circumference of 1.24m.
121 litres
What is the metric unit that is used to represent mass?
gram
The area of one side of a square tank is 20 ¼ sq. ft. What are the lineal dimensions of one of the sides?
4’6” x 4’6”
Which wrench should be used if you are working with finished stainless of chromed pipe?
Strap wrench
Complete the following statement: “A straight tee shall only be used in a drainage system to …”
Connect a vent
Complete the following statement: “ A single sanitary tee may be used to …”
Individually vent a fixture above the centreline of the fixture drain
Continuously vent a fixture
Connect a branch vent to a stack vent
All of the above are correct
Complete the following statement: “ A single sanitary tee cannot be used to…”
Change the direction of flow in a horizontal waste
What is the common centreline rough - in dimension for the water supply to a standard floor-outlet residential water closet?
6”
What type of tubing should not be used to supply water to a carbonated drink dispenser?
Copper
What is a standard height A.F.F to the drain for a pedestal basin?
18 ½”
What does “barrier free” mean?
accessible to the physically challenged
Which gas listed below is heaviest?
Butane
What would a fire in a combustible material such as paper or wood be identified as?
Class A fire
What is the correct name given to the plumbing drain installed in conjunction with an enameled steel tub?
waste and overflow
The crimp ring used to complete a joint in PeX pipe should be crimped at what length?
1/8” - ¼” from the end of the tube
What type of valve is most likely to be found directly inside a residential building at the end of a water service?
Compression stop and waste
What type of valve is most commonly used directly inside a commercial building?
gate valve
1 ¼” copper pipe shall be supported horizontally by hangers spaced no further apart than what?
10 ft
At what angle is the shield on a drinking fountain?
45 degrees
What is the name given to a pipe drawing submitted after the job is completed, that shows locations of piping on the job?
As-built drawings
Water or industrial waste may not enter the drainage system if the discharge temp. is higher than what temp?
75C
Question 69 (hehe) is a math question
If hangers are required every 10 ft on a horizontal pipe that is 90 ft long, how many hangers are required (excluding those at each end of the pipe)
8
How can the effects of water hammer be lessened?
By the use of shock stops
How is vertical pipe normally supported?
by riser clamps
What is the purpose of the hex nut on a check valve?
Allow access to the pin and disc
What is the type of hanger best suited for supporting a run of 6” soil pipe?
adjustable clevis hanger
Determine the total length of pipe necessary in order to cut the following pieces:
2 x 3’ - 4½” e-e
1 x 63 ½” e-e
3 x 27 ¼” e-e
2 x 2’ 4 3/8” e-e
23’ 7”
question 76 is a picture question
Which of the following hangers would be suitable for use on a 6” galvanized cold water line?
6” clevis hanger
Question 78 = picture question
A crimp ring is used to join which pipes?
PeX
How do the wheels on a snap cutter cut the pipe?
They apply pressure to break the pipe
Question 81: picture question
Complete the following statement: “ The clamp on an MJ cast iron drainage pipe is …”
Stainless steel
Complete the following statement: “ A pipe saddle is …”
Used to prevent pipe insulation from crushing
What would the water supply to a domestic dishwasher be?
hot only
Complete the following statement: “ According to manufactures’ installation instructions, the WC bolts …”
Are cut to length after the bowl is installed
A horizontal pipe is 50 ft long with a hanger at each end. How many additional hangers will be required if the spacing between hangers is to be 3 ft?
16
Which type of valve can be described as a compression type valve?
A globe valve
What can be classified as clear - water waste?
Drinking fountain
relief valve outlet
air conditioner drainage
all of the above
Question 89 is a knotty question
question 90: also knotty
question 91: still knotty
Question 92: the knottiest
The relief valve piping from a hot water tank shouldn’t be pipe directly into a floor drain because?
contamination of the potable water system may occur
Fluxes used for brazing have a temp range of:
1100 - 1500F
When required, guardrails shall be placed at:
42” above the platform
An extension ladder is placed against a roof overhang which is 20 ft above the ground and projects 2 ft out from the building wall. The proper distance from the wall to the base of the ladder is:
7 feet
The purpose of a septic tank is to:
break down solids
A roll groover for pipe:
Will not remove the burr
Galvanized pipe is steel pipe with a coating of:
zinc
Why is it necessary to ream a pipe before cutting the thread?
If reaming follows threading, the pipe end may split or flare
When required, guardrails shall be placed at:
42” above the plateform
Indirect (momentum) siphonage of a trap:
Is due to the operation of other fixtures in the system
The upper portion of a ladder should extend past the point of contact with the roof by:
36”
What is the function of a “ball drip” used on a fire department connection?
to drain the siamese connection
The pressure at the base of a column of water 45ft high would be:
19.49 psi
The dip tube in a HWT is located:
on the cold inlet
Low Temp. Boilers operate at a temp below:
250F
What type of knot is used to tie together 2 rope of unequal diameter?
sheet bend
Question 109: math
A ditch that is 5’ - 6” deep requires:
Either: shoring or sloping of the sides
After tightening a malleable iron fitting by hand, it is turned by a wrench:
approx. 2 ½ - 3 ½ turns
A water closer auger:
is only useful for clearing a blockage inside the toiler bowl’s trapway
Heat transfer from molecule to molecule is known as:
conduction
Question 114: math
What type of valve is considered as a quarter turn?
plug
Question 116: picture
A plug valve would be very similar in its design to a:
ball valve
An 8” x 6” x 4” standard butt weld tee would have a branch outlet size of:
4”
The valve recommended for service conditions that are fully open or fully closed:
gate
Check valves are acceptable for:
use in vertical piping systems
The spacing of hangers / supports are specified in the:
NPC 2015
ACR and GP Soft Copper tubing is measured by it’s:
OD and wall thickness
Copper tubing suitable for water service lines:
K & L soft temper
Gaskets stored for long periods shall be kept:
flat
The material that is used commonly today to repair lead and oakum joints is:
Oakum and PC - 4
