IP practice 2

Question 1

when installing a septic tank u can use a gravity system if ____ ..

Answer 1

field is lower than the outlet of the tank

Question 2

when the field is above the inlet of the septic tank what must u use

Answer 2

a pump

Question 3

what could be the problem if boiler safety relief valve keeps discharging

Answer 3

failure of pressure reducing valve or faulty aquastat

Question 4

what do u require on a cooling tower

Answer 4

water softener, rp, pressure vacuum breaker, and air gap

Question 5

what type of heater can be use when theres not enough room for fin

Answer 5

kick space heater

Question 6

what connectors does a chiller use

Answer 6

flexible flanged connectors

Question 7

on recessed forced flow heating install thermostat on

Answer 7

return air next to the unit

Question 8

best location for a wild loop in heating

Answer 8

inside doorways (vestibules)

Question 9

wiring on submersible should be strapped every

Answer 9

10ft

Question 10

pipe from pitless adapter should be graded ____ …

Answer 10

up towards the house

Question 11

1) when troubleshooting pump there is high amperage, what is the problem
2) low amperage ?
3) no amperage ?

Answer 11

1) high amp means impeller is stuck so the pump is working too hard
2) low amp means theres low water in well, impeller is broken or venture is plugged
3) no amp means defective pressure switch, switch tube might be plugged

Question 12

when there is cavitation what could be the problem w the pump

Answer 12

pump is working above max lift capacity, and there’s a pressure difference between inlet/outlet

Question 13

standard pressure tank is ___ air and ___ water

Answer 13

1/3 air and 2/3 water

Question 14

what is a common problem when there is hardness in the water

Answer 14

there is calcium and magnesium

Question 15

degrees of hardness in water starts from very soft at 0 - ____ and adds ____ every time it gets harder

Answer 15

0-50, adds 50 to get to next level of hardness and so on ex. mid soft is 50-100 mid hard is 100-150 etc

Question 16

temporary hardness settles at ___ deg C

permanent hardness at ___ deg C

Answer 16

temp hardness - 60 deg C

perm hardness - 140 deg C

Question 17

what causes back siphonage ? it might happen to a hose bib so what does it require

Answer 17

negative pressure in the system, like a vacuum. so hose bibs require a vacuum breaker

Question 18

test pressure for medical gas

Answer 18

150psi or 1 and a half times its working pressure whichever is greater for 24 hours

Question 19

if flush valve has a long flush it could be because of a

Answer 19

dirty/plugged bypass

Question 20

distance of soil from edge of trench

Answer 20

1m or 3’3”

Question 21

max heigh of rp to floor

Answer 21

5 feet

Question 22

if a zone valve is noisy it was probably installed ___

Answer 22

backwards

Question 23

where do u install mitigated radon pipe

Answer 23

under slab

Question 24

interior leaders and sows must have a cleanout where?

Answer 24

3m upstream from the bottom of the leader or stack

Question 25

when doing a ball test what are the min. diameters for the ball

Answer 25

50mm for pipes 3 inches or more | 25mm for pipes less than 3 inches

Question 26

minimum trap arm length of unvented fixture drain also the standard height of the trap arm for a lavatory

Answer 26

18 inches or 450mm

Question 27

minimum trap fixture drain

Answer 27

2"

Question 28

max height from manhole taper

Answer 28

1m

Question 29

what to do if hot water pipe is longer than 30m or extend 4 storeys ?

Answer 29

provide recirculation

Question 30

what type of copper is permitted in drainage

Answer 30

dwv copper, type k, and type L hard copper

Question 31

PVB shall at least _____mm above the flood level rim of a fixture or tank

Answer 31

300mm

Question 32

how do u change top element in a hwt

Answer 32

shut power then water, drain tank, change element, close drain, turn on water then power

Question 33

insufficient hot water from a hwt could be because of a

Answer 33

broken dip tube

Question 34

what fitting could be use in between cleanouts on a building sewer

Answer 34

2 - 22 1/2 elbows

Question 35

which drawings should be referenced when determining (DETAILED) locations of sleeves in concrete floors in high rise construction

Answer 35

gridlines on the architectural drawings

Question 36

what is another way of protecting underground piping besides thrust blocks

Answer 36

continuous rodding

Question 37

what equipment is installed when booster pumps are used in the water distribution piping of a high rise

Answer 37

expansion tanks

Question 38

where is the jet assembly located for a deep well jet pump

Answer 38

5 feet below the water level

Question 39

at what pressure should a diaphragm pressure tank be pre-charged to

Answer 39

2-3 psi below the cut in pressure

Question 40

flood level rim height of a standard water closet is

Answer 40

15 inches

Question 41

in the gasfitting and refrigeration trades copper tubing sizes are commonly specified by

Answer 41

their exact outside diameter | note: for copper water sizes in the plumbing trade we use nominal inside diameter

Question 42

what knot can be used to join two ropes of different diameters

Answer 42

sheet bend

Question 43

what type of hanger is use to support multiple pipe lines

Answer 43

trapeze

Question 44

what type of drawing is used for more accurate scale and a more realistic appearance to represent a piping system

Answer 44

double line drawings

Question 45

the minimum number of planks and their dimensions for a working platform shall be

Answer 45

2 planks, 2 inch x 10 inch nominal

Question 46

what type of valve is used in the food processing industry to avoid product contamination

Answer 46

diaphragm valve

Question 47

what are the requirements for installing a zone shut off valve within a valve box used for medical gas

Answer 47

if the valve handle is closed, the door can not be closed

Question 48

air dryers are installed downstream of the ___ ____

Answer 48

receiving tank

Question 49

branch lines for a compressed air system should be taken off the ______ of the supply main

Answer 49

top

Question 50

if the pressure of water in a hydronic heating system was to drop below boiling what is the result

Answer 50

cavitation

Question 51

turning a prv's adjusting screw clockwise will ____ ____

Answer 51

increase pressure, vice versa

Question 52

where is the cooling coil located on a combination heating and cooling furnace system

Answer 52

in the supply plenum close to the furnace

Question 53

which type of hanger or support would be used on a piping system that may experience a wide temperature variation

Answer 53

roller

Question 54

an expansion tank in a hydronic heating system should be able to accommodate a ____ increase in water volume

Answer 54

4%

Question 55

the type of valve used to even out the flow in split zone heating system is the

Answer 55

balancing valve

Question 56

the type of valve needed on a domestic hot water side of a heat exchanger would be a ______ valve

Answer 56

tempering

Question 57

what device is used to sense an unsafe water level in a hot water heating system

Answer 57

a low water cut off

Question 58

what is required when a conventional boiler is installed in a low temperature radiant floor heating application

Answer 58

a mixing valve

Question 59

which piece of equipment would be required on all steam boilers and hot water boilers over 400 MBH

Answer 59

low water cut off

Question 60

when using a solar heating system like a space heating boiler to heat domestic hot water, which equipment is required

Answer 60

heat exchanger

Question 61

what is a heated area that is required by one circulator, control or thermostat

Answer 61

zone

Question 62

where should the connections be made on an upfed cast iron radiator

Answer 62

bottom in bottom out

Question 63

what would be installed between a cooling fan coil and the fixed piping attached to the building structure

Answer 63

isolation valves and flex connectors

Question 64

what would be installed in the piping to and from a chiller when it is being supported by rubber isolation pads

Answer 64

flex connectors

Question 65

where would the FLOW SWITCH be installed in a low mass boiler

Answer 65

on the hot water supply line from the boiler

Question 66

where should the balancing valves be located for a radiant panel heating system

Answer 66

on the return header

Question 67

when a boiler is being used to heat the domestic water through an indirect tank, what are required on the domestic water piping

Answer 67

check valve and tempering valve

Question 68

this device adjusts the boiler water temperature depending on the outdoor temperature

Answer 68

boiler reset control

Question 69

max cumulative change of direction allowable on a trap arm for a basin

Answer 69

135 degrees

Question 70

which of the following best describes the length of time for a piston or diaphragm flush valve to cycle

Answer 70

size of the bypass orifice

Question 71

how is the volume of a urinal flush tank controlled

Answer 71

metering valve

Question 72

if the jet assembly in a deep well jet pump system must be lowered what must be done also

Answer 72

re-adjust the control valve

Question 73

which chemical will damage pyrex pipe

Answer 73

hydrofluoric acid