Year 2 Flashcards
(155 cards)
1
Q
Group of general rules adopted by a legal jurisdiction and made into law are called:
A
Codes
2
Q
Documents prepared by a professional group indicating good engineering practices that are optional are called what?
A
Recommended practices
3
Q
If a 3” pipe is reduced to 1 1/2” how will that affect the velocity of the fluid in the line?
A
Increase velocity by 4 times
4
Q
The reversal of normal water flow due to negative pressure is called what?
A
Back-siphonage
5
Q
What is the most effective method of cross-contamination prevention?
A
Use an air-gap
6
Q
The transfer of energy in the form of waves or particles is referred to as what?
A
Radiation
7
Q
Baseboard heaters warm a room using what heat transfer method?
A
Convection
8
Q
An HTU that has a heating element and a cabinet is called what?
A
A convector
9
Q
How is baseboard radiation rated?
A
BTU’s/Hr./FT
10
Q
Unit heaters should be how high above the floor?
A
6 to 12 feet
11
Q
Why are some air-handling units mounted on springs?
A
To isolate vibration
12
Q
What type of glycol is considered food grade and non-toxic?
A
Propylene glycol
13
Q
What is the primary purpose of a heating system?
A
Provide individual comfort
14
Q
What would be the maximum length of serpentine heating circuit if the tube was 3/4 inch?
A
500 ft
15
Q
What is the heat loss limitation on a series loop system?
A
60-70 MBH
16
Q
What are two types of hot-water unit heaters?
A
Blow-through/Draw-through
17
Q
What mechanism holds back steam but allows condensate and gases to pass through it?
A
Steam trap
18
Q
Too much condensate in a steam line can cause what problem?
A
Water hammer
19
Q
What type of steam trap is actuated by the differences in temperature between condensate and steam?
A
Thermostatic type
20
Q
Which steam trap is recommended for a low pressure steam main?
A
F and T
21
Q
When installed properly, a wire rope clip develops what percent of the wire rope strength?
A
80%
22
Q
Sections of a cast-iron boiler are drawn together with what?
A
Tie rods
23
Q
What allows water to travel between sections of a cast-iron boiler?
A
Push nipples/sealing rings
24
Q
Does an aquastat sense changes of pressure or temperature?
A
Temperature
25
What mechanism prevents natural circulation on a hydronic heating system?
Flow control valves
26
What is a float operated device that vents air from a hydronic heating system?
Automatic air vent
27
What does a micro bubble reabsorber do?
Eliminates air from a hydronic system
28
What is a 'lockshield' valve used for?
Prevent unauthorized valve change
29
How are high temperature hydronic boilers rated?
MBH/BHP
30
What is the purpose of a 'wild loop' in a hydronic heating system?
Prevents pump deheading
31
The expansion and contraction of a piping system is controlled with what device(s)?
Expansion loop/Joint
32
What mechanism limits the amount of deflection in a piping system?
Pipe guide
33
A bare pipe resting on a support can be prevented from wear by installing what on the pipe?
Wear pad
34
What device will prevent insulation from being crushed when the pipe is suspended?
An insulation saddle
35
Large heating coils located in air handling units and used to heat or cool an occupied space are called what?
Blast coils
36
A snow melt system requires what component?
Heat exchanger (HEX)
37
Where is the fan located on a vertical unit heater?
Middle
38
What must be installed on a hydronic heating system because of different velocities?
Balancing cocks
39
What is the ideal radiant floor temperature?
29 degrees C/85 degrees F
40
What is one advantage of the reverse return heating system?
Easy to balance
41
How would one describe a 3-way mixing valve?
2 inlets - 1 outlet
42
What is a unit heater often used for in a hydronic heating system?
A wild loop
43
What can be done to prevent radiant tubes from collapsing when covering them with cement?
Put 30# test pressure in line
44
How does increased pressure of a fluid affect the boiling point?
Increases boiling point
45
What causes water hardness?
Dissolved minerals
46
What causes temporary hardness of water?
Bicarbonates of sodium and magnesium
47
The gases in rainwater make the PH above or below 7?
Below 7
48
Where is coagulant added to boiler feedwater to produce "floc"?
In the clarifier
49
The bringing together of various lifting devices to raise or lower a workpiece is called what?
Rigging
50
What section of the ASME code covers unfired pressure vessels?
Section VIII
51
How many imperial gallons are contained in one cubic foot?
6.24 gallons
52
What is one advantage of the 'gun pakt' expansion joint?
Can be repacked under pressure
53
What are the most common coagulants in water treatment?
Aluminum sulfate/Aluminum hydroxide
54
How is the strongest fiberglass pipe constructed?
It is filament wound
55
A column of water 1 foot high exerts what pressure at the base?
.433 PSI
56
When working with fiberglass what should never be added to a catalyst?
A promoter
57
What safety equipment should one always wear when working with MEKP?
Monogoggles
58
When using the hand lay-up method of joining FRP pipe which strip should be applied first?
The narrow strip
59
If one doubles the amount of catalyst added to the FRP resin how does that affect gel time?
Reduces it by one half
60
Stainless steel is an alloy made of what metals?
Nickel/Chromium/Iron
61
What is the primary element that gives stainless steel its corrosion resistance?
Chromium
62
With reference to hydronic heating what does the acronym ODT represent?
Outdoor Design Temperature
63
How could one improve heat transfer between steam tracing and the process line?
Use heat-conducting paste
64
What is the easiest way to trace small bore vertical pipe?
Spiral the tracing around the pipe
65
What information is needed to draw a pipe flange to scale?
Actual OD/Bolt circle diameter/Bolt hole diameter
66
At what pipe size do we begin sizing by using the pipe outside diameter?
14"
67
What is the formula for calculating the cut-back on a mitered elbow?
Cut back = pipe OD x Cut angle factor / 2
68
What can be used to extend straight lines along the length of a pipe?
An angle iron
69
How can hi-low be removed from large diameter pipe when welding 2 pieces together?
Use pipe dogs
70
What can be used as a brake to help control the position of a load floating on an air cushion?
A snubbed line or a tirfor
71
What principle states that "a body, immersed in fluid, loses as much weight as the weight of the fluid is displaces"?
Archimedes principle
72
What is the PH of neutral water?
7
73
What is the buoyant force on a 5ft^3 box immersed in water?
312 IB
74
Is a fire tube boiler considered a high or low mass boiler?
High mass
75
What color are PTFE gaskets?
White
76
What is the name of a pipe support welded directly to the piping that offers vertical or horizontal support?
Dummy leg
77
The second law of thermal dynamics states what?
Heat travels from warm to cold
78
The acronym NPS refers to what?
Nominal pipe sizing
79
Why would one install a valve on a pipe strainer?
To blow down the strainer
80
What post weld treatment is required on nickel alloys to maintain corrosion resistance?
Passivating
81
Can anyone erect 'tube and clamp' scaffold?
Qualified personel
82
What is the maximum length of a scaffold ladder?
6.4 meters/21 feet
83
What is used on scaffolds to prevent materials from falling on other workers?
Toe boards
84
A fabricated portion of a section of piping including all fittings and flanges is referred to as:
Pipe spool
85
The majority of all spools drawings are drawn how?
Isometrically
86
If you wanted to see how a piping system would look like from the top what view would you reference?
Plot/plan view
87
Which boilers are rated in BTU or EDR?
Low pressure steam boilers/LTHW boilers
88
Where is a boilers net rating taken from?
The first heat transfer unit
89
An HRT boiler is classified as what type of boiler?
Firebox
90
The procedure of unplugging clogged blowdown lines on a boiler is termed what?
Rodding
91
What is the most common cause of foaming in a boiler?
Dirty boiler water
92
How often should a safety valve on a LP steam heating boiler be tested?
Annually
93
What is the function of sand in raw water treatment?
Remove turbidity
94
What piping material is used to transport dry chlorine gas?
Carbon steel
95
A sodium ion exchange water softener contains what?
Zeolite beads
96
What causes a flow control valve to open?
Fluid velocity
97
What is the greatest advantage of hydronic heating systems over any other system?
Multiple zoning
98
What part of a hotwater circulator transfers energy to the water?
The impeller
99
A hydraulic jack with a separate pump that allows for different RAM sizes is called what?
Porta pump
100
What is a rule of thumb for calculating the weight of steel pipe?
1'x1'x1" thick steel weighs approx. 40lb
101
The ability of a material to withstand 2 equal forces acting in opposite directions is referred to as:
Shear strength
102
Shoulder type eyebolts should be used with angular pulls greater than what degree?
45"
103
Can PVC pipe be fusion welded?
Yes
104
Can PE pipe be solvent welded?
No
105
What is the simplest way of making fiberglass pipe and fitting?
Hand layup or contact mould method
106
What is the name of strands formed by spinning a quantity of glass fibres together?
Rovings
107
How much force is required to properly torque a lock collar?
Fingertight
108
The ability of a material to resist forces acting to pull or push the material apart is referred to as:
Tensile strength
109
What type of copper is used for heat tracing?
Type K and L
110
How can you tell if a chain is suitable for construction lifting?
Each link is stamped with a letter or number
111
What is the main contaminant found in surface water?
Suspended solids
112
A minimum of how many rollers should be used for moving skid mounted?
three
113
Why is 'special purpose piping' needed?
Corrosion prevention
114
Why does the oil and gas industry prefer plastic piping?
Because of possible wax buildup in metal lines
115
Elastomer pipe liners are made from what natural materials?
Rubber
116
What material is the least expensive pipe liner?
Polypropylene
117
Can lined pipe be welded?
Yes provided the lining is not compromised
118
What is another name for 'catalysts' used in the fibreglassing process?
Hardeners
119
What is the most exotic and expensive piping material used today?
Titanium
120
The process of forming an oxide layer on stainless steel is called what?
Passivating
121
Should stainless steel piping be stress-relieved?
No
122
What type of valve is mounted between flanges and is held in place by flange bolts?
The wafer type
123
The control system on a heating boiler should be how many volts?
24 volts
124
Rainwater must be treated for what impurities?
oxygen/carbon dioxide
125
What is another name for microfiltration?
reverse osmosis
126
What hazards might a fitter encounter when working on a demineralizer?
Caustic and acid
127
What is used to regenerate sodium zeolite water softeners?
brine
128
How do free standing steam radiators transfer heat into a room?
using convective currents and radiation
129
What is the term for cold air entering your house through cracks?
infiltration heat loss
130
The most used synthetic rope in industry
polypropylene
131
What is the strongest synthetic rope?
nylon
132
Why is hemp rope not used in industry?
may rot under wet conditions
133
The centre of a wire rope is called what?
core
134
A worker must wear a harness when over how many metres above the floor?
3 metres
135
A rope is attached to a post or ring using what?
hitch
136
Why is silicon added to cast iron?
corrosion resistance
137
Name one advantage of using glass pipe
corrosion resistance
138
How often is a glass piping system supported?
at every joint
139
Kimax is what type of pipe?
glass
140
What chemical corrodes glass pipe?
hydrofluoric acid
141
Low temperature heating boilers are covered under what section of ASME?
Section IV
142
List one advantage of the two pipe reverse return heating system
equal heat distribution
143
Should a HW circulator pump into or away from a cushion tank?
Pump away from
144
List one advantage of a cast-iron boiler
it is expandable
145
The PRV in residential hydronic system is set at what pressure?
15 PSI
146
What is the most popular plastic pipe for hydronic heating?
PEX
147
What is the name of special tees used in a one pipe heating system?
Monoflow tees
148
What type of pumps are used in hydronic heating?
Centrifical
149
A gauge that indicates temperature pressure and feet of head
combination gauge
150
Hotwater EDR is equal to how many BTU's/HR?
150 BTU's/hr
151
On a hydronic heating system what might be the cause of a weeping relief valve?
Waterlogged compression tank
152
The balancing valves on a hydronic system are usually:
Globe valves
153
What is the preferred way of attaching a tag line?
clove hitch
154
What type of copper tubing is approved for hydronic heating?
Type K, L, and M
155
What is the term for helical twists that are put into strands of wirerope?
Preforming
