Review Flashcards
1
Q
Which hand tool is used to locate a point from the ceiling to the floor?
A
Plumb bob, laser pointer
A plumb bob is a weight suspended from a string used to find a vertical reference point.
2
Q
What is the purpose of screwdrivers?
A
To turn or drive screws
Screwdrivers are essential tools for driving screws into various materials.
3
Q
What type of screwdriver are you permitted to use a wrench with?
A
Square blade screwdriver
This may refer to a specific type of screwdriver or brand that allows for wrench use.
4
Q
What type of reamer must only be used by hand?
A
Spiral reamer
Spiral reamers are designed for manual operation and should not be powered.
5
Q
What is the main difference between cutting wheels for different materials?
A
Blade thickness
Different materials require varying blade thicknesses for effective cutting.
6
Q
What is the ‘T’ handle used for on a portable chain vise stand?
A
Brace stand in doorway or under beam
A ‘T’ handle provides stability when securing the vise in place.
7
Q
Can you use a pipe wrench as a hammer? If so, what wrench may be used?
A
Yes. Wrap wrench
Using a wrap wrench can help prevent damage to the pipe while providing a striking surface.
8
Q
What type of wrench should be used on valves?
A
Hex wrench
Hex wrenches fit securely into the valve’s hexagonal shape for effective turning.
9
Q
Approximately how much lighter is an aluminum handle pipe wrench versus a steel handled wrench?
A
40% lighter
Aluminum pipe wrenches provide easier handling without sacrificing strength.
10
Q
What is the proper name for the upper and lower jaw of a straight pipe wrench?
A
Upper → hook jaw / lower → heel jaw
The hook jaw grips the pipe while the heel jaw provides stability.
11
Q
How many points of contact must be made on the pipe using a pipe wrench to properly tighten pipe into the fitting?
A
2 Points of Contact
Two points of contact enhance grip strength and prevent slippage.
12
Q
What is the safest practice when using a chisel that has mushroomed?
A
Discard chisel. Do not attempt to repair it.
A mushroomed chisel can cause injury and should not be used.
13
Q
What type of file is typically used throughout the sprinkler industry?
A
Half round files
Half round files are versatile for various shaping and smoothing tasks.
14
Q
What is the term used to describe the type of power tool that does not require a ground?
A
Double insulated
Double insulated tools enhance safety by reducing the risk of electric shock.
15
Q
Which direction should the blades face while using a hacksaw?
A
Away from user, towards work surface
This orientation ensures safety and effective cutting.
16
Q
What type of hammer should be used when installing post-installed anchors?
A
Hand drilling hammer
Hand drilling hammers provide controlled force for anchor installation.
17
Q
What is the proper name of the wrench commonly referred to as the thumb wrench?
A
Adjustable wrench
Adjustable wrenches can accommodate various sizes of nuts and bolts.
18
Q
What is the proper name of the wrench commonly used when installing flanges?
A
Open end, box end, combination wrench
These wrenches provide versatility for different fastening scenarios.
19
Q
What type of plier is commonly referred to as channel locks?
A
Arc joint pliers
Channel locks can grip various sizes of objects due to their adjustable feature.
20
Q
How often should a cordless drill be sent back to the manufacturer for maintenance?
A
Every 6 months
Regular maintenance intervals help ensure optimal performance and longevity.
21
Q
What should you use to clean cordless power tools?
A
Mild soap and water on a damp cloth
Proper cleaning prevents buildup and extends the life of the tools.
22
Q
How does an automatic sprinkler operate?
A
Element is activated by heat, plug is released, water sprays through orifice and diffuses to spray pattern by diffuser.
23
Q
What is the most common k factor of an automatic sprinkler head?
A
5.6k
24
Q
What are three different types of elements for automatic sprinklers?
A
- Frangible bulb
- Solder link and lever
- Frangible pellet
25
What part of an automatic sprinkler converts the water into a fine stream?
The smooth bore opening and deflector.
26
What is the minimum pressure required for the satisfactory operation of an automatic sprinkler?
7psi.
27
What three factors influence sprinkler discharge?
* K-Factor (orifice size)
* Flow
* Psi & deflector
28
Name six basic components of a sprinkler system.
* Control
* Means for alarm
* Drain
* Surge protection
* Piping
* Sprinkler heads
29
List the elements of a wet pipe system and describe how it operates under fire conditions.
* Head activates with heat
* Flow is initiated
* Low pressure signal
* Flow causes alarm
* Alarm signals are sent to monitoring which is then sent to fire dept.
30
List the elements of a dry pipe system and describe how it operates under fire conditions.
* Head activates with heat
* System air pressure is dissipated
* Low pressure signal is sent
* City pressure eventually overcomes system pressure
* Water flows into alarm chamber and system through opened head
* Alarms are signaled.
31
What time limit is permitted to give an audible alarm on a sprinkler system?
5 min; building code is 1 min.
32
What is the time limit permitted for an automatic dry pipe system water delivery?
60 seconds as per hazard.
33
What is the time limit permitted for a combined dry pipe preaction system water delivery?
3 min; 1 min for every 400ft of pipe.
34
What is a deluge system? Where is it most often used?
Extra hazard open nozzles, operates in detection.
35
How does a preaction system differ from a dry pipe system?
Detection apparatus is used in conjunction; deluge valve, pull stations.
36
What advantage does a preaction system have over a dry pipe system?
If a head is activated, water won’t spray the area unless detection is activated.
37
How does a deluge system differ from a dry pipe system?
Detection causes the valve to operate and all heads dump water simultaneously.
38
What organizations approve sprinkler heads?
* FM approves
* UL lists
39
Describe the difference between 'spray sprinklers' and 'old style sprinklers'.
Spray pattern old is 60% down, 40% up while spray is an umbrella pattern.
40
Can spray sprinklers be installed to replace old type sprinklers in existing systems?
Yes.
41
Where is the use of the old type sprinkler permitted today?
Piers, wood and terminals walls, fur storage vaults.
42
Name five types of sprinklers.
* Upright
* Pendant
* Sidewall
* Window
* Dry pendant
43
Are pendant and upright sprinklers interchangeable? If not, why?
No; piping modification is required to meet directional needs.
44
Describe dry pendant sprinklers and indicate where they are used.
Freezers; head activation activates a spring and opens piping above head flowing water.
45
List the temperature rating and the colour coding of four common sprinklers used today.
* Red 155F (ordinary)
* Green 200F (intermediate)
* Blue 286F (high)
* Yellow 175F
46
Name three orientations of sprinkler deflectors.
* Upright
* Pendant
* Sidewall
47
List the advantage frangible bulb has over frangible pellet sprinklers.
* Cheaper
* More sensitive
* More accurate
48
List five don’ts in handling sprinkler heads.
* Remove covers before install
* Over-torque
* Dry fit
49
What is a trapeze hanger? Where is it used?
Pipe with hanger system to hang pipe off of; hung between structure points.
50
Name three types of hangers for wood, steel, and concrete.
* Wood: drive screws, u-hooks, coach screw rods
* Steel: beam clamp, centre beam clamps, power driven stud, u hook
* Concrete: post installed anchors, expansion shields
51
What fastener on wood construction is used with U hooks?
Leg screws.
52
What fasteners on wood construction are used with eye rods?
Leg screws, through bolts.
53
Where is ductile iron pipe used? Where does it terminate?
Underground; at spigot, 2’ above grade.
54
What does P.I.V mean?
Post indicating valve.
55
Explain 'fire watch'.
System is down, supervising patrol of area by a competent person.
56
List four types of fire extinguishers and the type of fire that it may be used on.
* A - ordinary combustibles
* B - flammable liquids
* C - electrical
* K - cooking oils
57
What methods should be used to prevent trench cave in?
Wet shoring.
58
What sprinkler system may use retarding chambers?
Wet system
59
What system may use an accelerator?
Dry double interlock preaction.
60
What sprinkler system requires the least service?
Shotgun, wet.
61
What pressure is maintained in the intermediate chamber?
Atmospheric 14.7psia.
62
List two quick opening devices.
* Exhauster to send it to atmosphere
* Accelerator
63
What provision should be made for periodic examination of pipes for ice formation?
30” easily removable piece in fridge area.
64
How should a dry pipe valve be protected from freezing?
Located in heated area or valve enclosure.
65
Normal air pressure for a dry pipe sprinkler system should be restored in a certain time limit, namely?
30 minutes.
60 minutes in refrigerated
66
Describe pipe arrangement for a nitrogen bottle supply for a dry system?
Through hi/low pressure regulator to manage pressure change, then AMD.
67
What is the required air pressure for a dry pipe system?
Depends on differential and valve; 40psi is common.
68
Where are pressure gauges required on dry pipe systems?
* Air gauge on system side tied to air supply
* On air supply
* On accelerator
* On water supply side
69
What is the maximum number of heads recommended on one antifreeze system?
20 heads, 40 gal.
70
Name two antifreeze solutions.
* Glycerin
* Propylene glycol
71
Describe the piping arrangement for an antifreeze system where sprinklers are above or below test valve A?
* Above need check valve
* Below need check valve
72
How does a deluge valve operate?
Detection line activates valve; water takes from priming chamber and trips faster than the restricted orifice can replace the water.
73
What is meant by automatic supervision of heat responsive devices?
Pressure switch or resistors.
74
What is the minimum average discharge from an open sprinkler head in a deluge system in extra hazard group 1 occupancy?
100sgft, 30 gpm.
75
Where are pressure gauges required on pre-action and deluge systems?
* System side
* Pilot line
* Supply side
* Priming chamber
76
Where is an accelerator installed on a dry pipe system?
From system side to intermediate chamber, close as possible to valve above the priming line.
77
How does a smoke detector actuate a system?
Through detection line releasing panel to solenoid.
78
In combined dry pipe preaction system what enables simultaneous tripping of the two dry pipe valves?
1” connecting line to both valves.
79
In a limited water supply situation, what motive force forces the water out of the sprinkler?
Head pressure (gravity).
80
What is the minimum air pressure required in a pressure tank?
15psi.
81
What alarms/supervisory are required on a pressure tank installation?
* Low and high water level
* High and low pressure
* Flow
* Valve tamper
82
What two conditions would indicate a trouble signal on a pressure tank?
* Low pressure
* High pressure
* Low water
* High water
83
In a pressure tank what is the ratio of air to water?
2/3 water, 1/3 air.
84
What determines the size of pressure tank in a limited water supply system?
System demand, which from hazard, low pressure and duration.
85
What is a local flow alarm?
Any on-site alarm.
86
What alarms are on a wet pipe system, dry pipe system, and preaction system?
* Wet pipe: waterflow alarms – flow and pressure
* Dry pipe: flow and pressure
* Preaction: pressure flow
87
Why are flow alarm (paddle type) not installed on a dry pipe, preaction or deluge system?
Water hammer damage.
88
What is the function of the alarm check valve?
System check valve, drain port, alarm port; provides gauges.
89
What size pipe is used for connecting the alarm check valve to the water motor gong?
¾” non-corrosive metallic.
90
What is the maximum number of alarm check valves that may be connected to a water motor gong according to most manufacturers?
3.
91
What is the proper method of testing water flow devices which control electric alarm systems?
ITV.
92
What is used on alarm check valves to resist slight water surges?
Retard chamber, pilot port.
93
How is a paddle type flow indicator assembled on the pipe?
Folded towards water.
94
What is an annunciator and where is it located?
Supplement alarm system, main entrance.
95
What drains are provided on an alarm line?
* Wet restricted orifice
* Velocity – automatic
* Maintain atmospheric
96
How are systems broken down into areas for fire alarms?
Zones.
97
When will a trouble signal be sent from a supervised control valve, from a gravity tank? From a pressure tank?
* When control valve is other than full open
* Low water levels.
98
What is the minimum temperature permitted for gravity tanks?
42°F.
99
How are fire pumps supervised?
Fire pump controller, phase reversal, fire pump run.
100
Explain the installation and function of an excess pressure pump.
Prevent false alarms, supply to system, below the clapper.
101
Why is an annunciator often used as a fire signal in public buildings?
Located where people can hear it, direct fire department.
102
Explain the operation of an alarm switch.
Predetermined pressure closes contacts.
103
How are false alarms prevented?
* E.P.P
* retard chambers
* Timer on pressure switch
* Recycling retard feature on paddle flow switches.
104
How should sprinklered and unsprinklered areas be separated?
Fire wall.
105
What is the function of draft curtains?
Separate ESFR from other sprinklers.
106
When are reconditioned valves and devices permitted to be installed in sprinkler systems?
Existing system.
107
Who should approve sprinkler drawings?
AHJ and/or municipality.
108
Define: Light hazard occupancies.
Where combustibility is low.
109
Define: Ordinary hazard occupancies.
Low to moderate combustibility.
110
Define: Extra hazard occupancies.
Highly combustible.
111
Who determines the water supply requirements for sprinkler systems?
AHJ.
112
What is the smallest size street main to which it is desirable to make a connection for a sprinkler system?
6”.
113
What is the smallest underground sprinkler connection allowed?
Same size as the riser, as long as it feeds 1 zone.
114
When testing at a hydrant to determine the quantity of a water supply, how is the flow of water measured?
Residual measurement, velocity pressure.
115
What is the purpose of a fire department connection?
Supplement sprinkler system.
116
What is the minimum size for a yard main feeding both sprinklers and hydrants?
6”.
117
Where should domestic connections be made to fire protection piping, if permitted by authorities having jurisdiction?
Upstream fire control valve before back flow.
118
What are the requirements for the installation of pressure gauges?
* Must read 2x pressure against it
* NPT is ¼”
* 3% accuracy
* Three way to drain.
119
Where would the check valve for a fire department connection be located on wet sys, dry sys, pre-action sys and deluge sys?
After system valve.
120
How are sprinkler risers sized?
Hydro calc, pipe sch.
121
What is the maximum number of sprinklers on a branch line on either side of a cross main in a pipe schedule system of ordinary hazard occupancy?
8 on either side
122
What is a flushing connection and what is the minimum pipe size connection?
Flushing debris, 1 ¼” , removable fitting
123
What are the requirements for the use of return bends?
Shall be used in dry systems/pre-actions, in pendant position, in heated area
124
What restrictions are placed on the use of hand hose connections between wet and dry pipe systems?
Only connected to wet systems, 8.17
125
What is the required pitch on wet and dry pipe systems to provide adequate drainage?
Wet- level, dry-1/4” mains ½” branch over 10 feet. Refr, ½”
126
What is a drum drip?
dry system aux, 5 gal trapped
127
What is the function of a 'tie in' drain?
Connect multiple drains 1” min pipe ½” slope
128
What material are fittings used in sprinkler systems usually made of?
* Black cast iron
* Ductile
* Malleable
* Copper
* CPVC
* Stainless
* Grooved-ductile
129
What type of bushings are permitted in fittings?
* Hex, temporary
* Face, not temporary
130
What is meant by 'indicator type valve'?
valve with a feature to visually show open or closed
131
What is the only water supply that never requires a control valve?
FDC
132
What provision should be made to keep a 'c clamp' from coming loose due to vibration?
Retaining nut
133
What is the minimum thickness of a restraining strap used with a hanger?
16 gauge
134
What is the minimum thickness of steel into which a powder driven stud may be set?
3/16”
135
What is the maximum pipe size which may be supported by powder driven studs in concrete?
5”
136
In general terms give the location of hangers on sprinkler branch line, cross mains and feed mains.
* Branch- 6’ omission, from ends based on pipe size. within 24” after riser
* Cross mains-alternating rule
* feed-vertically, horizontally, hanger
137
What should be the position of the frame arms on an upright sprinkler be relative to the branch line pipe?
parallel
138
How does a 'large orifice' sprinkler differ from a 'standard' sprinkler?
Large water droplets that make it to fire on large. Fire suppression. larger orifice.
139
What type of finishes are provided on corrosion resistant sprinklers and by whom must this finish be applied?
* wax
* ent
* nickel
* polyester-by manufacturer
140
What temperature rating should be used for sprinklers located under a glass skylight exposed to direct sunlight?
Intermediate
141
What clear space should be kept below sprinkler deflectors to permit proper water distribution?
18” for standard spray
36” for special response
142
What is the maximum and minimum distance for deflectors under a smooth concrete ceiling?
1”-12”
143
Is there any difference between deflector distance under open bar joists or smooth ceiling construction?
no
144
What is the minimum and maximum distance for sprinkler deflectors under open wood joists and wood joist sheathed with gypsum?
1-6” , 2 with no drywall, 1-12”
145
What is the minimum distance for deflectors of pendant sprinklers under smooth ceilings?
1”
146
What is the minimum and maximum deflector distance for sprinklers under combustible and non-combustible ceilings?
1-12”
147
When may an air maintenance device be omitted on an air supply to a dry system?
Air compr capacity 5.5cubic feet/min at 10psi, when manual
148
What are the requirements for installing sprinklers under combustible and non-combustible stairway enclosures?
* Com-every intermediate landing
* top and bottom nc-top and bottom
149
When are sprinklers required under exterior docks and platforms?
if used for storage, machinery, or if accessible
150
Tables decks, platforms, etc, usually require sprinklers under them if their width exceeds what distance?
4’
151
When are baffles necessary between standard spray sprinklers?
When closer than 6’
152
What is the maximum area of coverage for sidewall sprinklers?
196 sqft
153
What is the maximum distance between sidewall sprinklers?
14’
154
What is the minimum and maximum distance a sidewall sprinkler may be from a ceiling?
4-6” , unless listed differently
155
What is the maximum width of a bulk head when using a sidewall sprinkler where coverage underneath is not required?
8”
156
Describe how to fill an antifreeze system.
pump
157
Why is there a one thirty second hole required in the clapper of a check valve in an antifreeze system?
Expansion, omitted when sprinkler under test valve A
158
How can you determine what temperature an existing antifreeze system can be subjected to without freezing?
refractometer
159
What governs the choice of size for an air compressor to be used to supply air to a dry pipe system?
Required air fill time, 30 min
160
When air is taken from a shop supply at 100 psi, what devices are required in the air supply line serving an automatically maintained dry pipe system?
* AMD
* check valve
* relief valve
161
What are the requirements for a sprinkler valve room?
* Lighted
* Heated
* Drainage
162
List 5 water supplies for sprinkler systems.
* city
* well
* tank
* fdc
* raw water
* fire pump
163
What is the minimum pressure and volume required for a water supply to light hazard occupancy and ordinary hazard occupancy pipe schedule system?
* 15, 500-750gpm
* 20, 850-1500gpm
164
What is residual pressure? How is residual pressure measured?
flowing water, normal gauge
165
Why is residual pressure used as a measure of the adequacy of a water supply?
in fire condition, this is the actual pressure
166
Why are pressure regulating valves and water meters undesirable in water supply mains?
friction loss
167
What 3 types of shutoff valves are recommended for use in a sprinkler water supply main?
* OS and Y
* butterfly
* non-rising stem
168
How is the adequacy of a public water supply determined?
flow test
169
What are the components that make up a fire pump installation for a sprinkler water supply?
* pump
* driver
* control valves
* discharge check
* circulation release
* controller
* jockey pump and controller
* sensing line
* positive water supply
* power supply
170
Give three reasons why fire pumps are usually of the centrifugal type.
* Simple operation
* Reliable
* Cheap and easy to repair as compared to others
171
What three types of drives are available for fire pumps?
* diesel
* electric
* steam
172
What percent of the rated capacity should a fire pump be capable of producing?
150%
173
What is the purpose of a trash rack screen?
filter water supply, always 2 for servicing
174
What is the purpose of a fire pump?
To give adequate pressure and maintain flow
175
Under what condition may the priming tank and priming connection be omitted?
When supplying a pump with positive pressure
176
Which pressure gauge will read the highest pressure when the fire pump is not running? The suction gauge or the discharge gauge?
they read the same when not running
177
What is a jockey pump? What is a jockey pump used for?
Pressure maintenance pump, needed so fire pump doesn’t turn on and stay on
178
Describe the normal operation of a fire pump and jockey pump as to sequence of operation.
**10 psi** below for jockey cut in
**5 psi** below jockey pump for fire pump
179
Give 5 rules governing the location, the construction and the equipment of a pump room.
* Fire rated walls
* Lighting
* Venting for diesel
* 50 feet from building when separate
180
Describe the proper procedure for mounting the bedplate for the pump and driver on the foundations.
Grouting, level and square
181
Describe the proper procedure to use for aligning the pump shaft with the drive shaft at the flexible coupling.
Remove flex cpl, use feeler gauge for angular and perpendicular
182
Why should pipes connected to the pump be supported independently of the pump?
vibration could create stress
183
Why is it preferred to supply water to the pump under pressure head rather than supplying water from a sump?
cant prime
184
Why must pumps taking suction under lift have a means of priming the pump?
So it can draw water
185
What is the minimum pump bowl submergence of a vertical shaft turbine pump at sea level?
10’ under draw line to second pump bowl assembly
186
When should a fire pump be installed with a by-pass arrangement?
If water supply can make it to sprinklers
187
Why shall all suction pipes be hydrostatically tested?
So it doesn’t leak, leaks suck in air and cause cavitation
188
Describe how a vertical shaft turbine-type delivers water at high pressure to the sprinkler system using a well.
more stages, more pressure
189
What two types of drives are usually used to operate vertical shaft pumps?
* Electric
* Diesel, diesel requires differential gear
190
Basket strainers should be made of what type of material? How large a free area should the strainer have?
* Non-corrosive
* 4x suction connection, metallic ½ inch strainer
**62.5% open area**
191
What is the purpose of the automatic air release valve?
Auto vent air when starting and stopping
192
What is a controller used for?
Controls pump, gives visual status of operation
193
In an internal combustion engine drive what additional components must be supplied?
* Fuel
* Exhaust
* Batteries/chargers
* Fuel lines
194
Why must the check valve be placed in a horizontal position at the base of the gravity tank?
Gravity would open the check
195
When a gravity tank is to be filled from the fire protection system, why is it necessary to have a bypass around the check valve?
fill the tank
196
What is the proper size pump to use for filling a gravity tank?
Any pump that can fill within 8 hours
197
What is the mercury gauge used for?
determine water level in gravity tank
198
What is the mercury catcher used for on the mercury gauge?
Catches mercury
199
Why shouldn’t the gravity tank function for both sprinkler system and plant water system?
So water level is adequate at all times for fire
200
Why should the water pipe to the mercury gauge have a continual upward pitch toward the tank?
Gets rid of air pockets
201
What is the approximate ratio of mercury to water in the mercury gauge?
13.56:1
202
What minimum temperature is allowed on a gravity tank? At what temperature should an alarm signal be received?
42F , 40F 5.5C, 4.4C
203
What is the minimum pipe size for the cold water return on a gravity tank heater?
2”
204
Why is it preferred to locate the pressure tank above the top level of sprinklers?
Head pressure, allows for smaller tank
205
How full of water should a pressure tank normally be? At what pressure should the compressed air in the tank be maintained?
* 2/3 water
* 75psi
206
How is the water level indicated on a pressure tank? How is the air pressure indicated?
sight glass
207
What automatic safety devices are required on a pressure tank?
* Air relief
* 1 ½” water relief
* 10% above operating
208
What capacity air compressor is required for the air side of the pressure tank?
16cfm, 22cfm
209
Why should stones and dirt be kept out of the underground pipe when it is laid?
obstructions
210
How should the pipe ordinarily be supported in the trench?
Across its whole length
211
What kind of joints should be used on ductile iron underground pipe?
Tyton, mechanical joint
212
What must be done to the back fill material after installing underground mains?
Layer tamped or puddle under and around pipes preventing settlement or lateral movement.
213
Why should the flushing occur before connecting up to the sprinkler system?
Commissioning process, keep pipe clean, 10’/sec……suction side of fire pump: 15’/sec
214
What is an exposure fire?
Fire jumping from building to outside or vice versa
215
How can an outside sprinkler system using open heads be made to operate automatically?
Deluge valve with detection
216
How are sprinklers controlled when they are installed to protect against more than one distinct and separate exposure?
Check valves, control valves
217
What is the maximum spacing distance for cornice sprinklers and the minimum discharge orifice?
10’, 8k, 5/8 ½”, 8’
218
When is it permissible to connect outside sprinklers to cross mains of inside automatic sprinklers?
E
219
What is the main purpose of using standard spray sprinklers?
Controlling fires
220
For what special hazards is a water mist system acceptable?
* Class A
* When commodities are of high value
* Causes less damage
* Also flammable liquids, droplet: under 400 um
221
What are some of the components of a water mist system?
* Auto nozzles
* Non-auto
* Multi-functional
* Propellant gas
222
What type of internal coating may be introduced into sprinkler systems to control MIC?
Listed coatings: potter pipe shield for wet
223
How is the extinguishment of a fire by water spray accomplished?
Heat absorption, evaporation (O2 displacement). Specific aiming of nozzles for specific
224
What is the acceptable fire classification for a water mist system?
Class A when commodities are of high value, causing less damage
## Footnote
Water mist systems are effective against flammable liquids with droplet sizes under 400 µm.
225
What are some of the components of a water mist system?
* Auto nozzles
* Non-auto nozzles
* Multi-functional nozzles
* Propellant gas
## Footnote
These components work together to create an effective water mist for fire suppression.
226
What type of internal coating may be introduced into sprinkler systems to control MIC?
Listed coatings, such as Potter Pipe Shield for wet systems
## Footnote
MIC stands for Microbiologically Influenced Corrosion.
227
How is the extinguishment of a fire by water spray accomplished?
* Heat absorption
* Evaporation (O2 displacement)
* Specific aiming of nozzles for specific objects
## Footnote
Aiming nozzles correctly is crucial for effective fire suppression.
228
How do water droplets displace oxygen?
Through latent heat expansion, displacing O2; fires extinguished under 15% O2
## Footnote
At 1700:1 ratio, this method effectively reduces available oxygen for combustion.
229
What type of fire are carbon dioxide systems used to protect against?
Electric fires, Class C
## Footnote
Carbon dioxide systems are effective for Class C fires due to their non-conductive properties.
230
Name two types of applications for carbon dioxide systems.
* Total flooding
* Local application
## Footnote
These applications are chosen based on the specific fire protection needs of the environment.
231
What is the difference between a total flooding system and a local application system?
Total flooding systems reduce O2 to below 15%, while local application systems allow for fires to live at 14.9% O2
## Footnote
Total flooding systems are used for entire rooms, whereas local systems target specific areas.
232
What is the operating temperature range for carbon dioxide systems?
-20F to 150F
## Footnote
This range ensures the systems function effectively under various environmental conditions.
233
What is the maximum operating force and travel of manual control for carbon dioxide systems?
Not more than 40 lbs pull force, not more than 14” travel to secure operation at 4 ft height
## Footnote
This ensures safe and effective operation of the systems.
234
What are the normal pressure and temperature for high-pressure storage containers for carbon dioxide?
* 70F
* 850 psi (fluctuates with pressure)
## Footnote
Proper storage conditions are critical for the safety and efficacy of carbon dioxide systems.
235
What is the room temperature range allowed for total flooding application storage containers of carbon dioxide?
0F to 130F
## Footnote
Temperatures outside this range can result in ice formation or explosion risks.
236
How much heavier is carbon dioxide compared to air?
1.5 times heavier
## Footnote
This characteristic aids in its effectiveness in displacing oxygen during fire suppression.
237
What is the normal temperature range for local application carbon dioxide storage containers?
32F to 120F
## Footnote
This range ensures that the system operates effectively without risk of failure.
238
What material should the pipe and fittings be made from for use in carbon dioxide systems?
Standard malleable, heavy fittings; no cast fittings
## Footnote
Malleable fittings provide the necessary durability and safety for high-pressure systems.
239
In high-pressure carbon dioxide systems, what weight of fittings shall be used?
Class 300 malleable, forged steel
## Footnote
This ensures that the fittings can withstand the pressures involved.
240
What type of fire is foam more widely used for?
Flammable liquids
## Footnote
Foam is effective in creating a barrier between fuel and air vapor.
241
How does low/medium expansion foam extinguish a fire?
By creating a barrier between fuel and air
## Footnote
This prevents oxygen from reaching the fuel source.
242
Describe three methods of introducing foam solution into a sprinkler system.
* Bladder (balanced pressure system)
* Pre-mix method
* Line proportioning (eduction method, siphoning, orifice plate)
## Footnote
These methods ensure effective delivery of foam for fire suppression.
243
What do all types of foam systems depend on?
Proper mixture
## Footnote
The effectiveness of foam in firefighting is contingent on achieving the correct mixture.
244
Name two methods by which foam may be applied to a fire.
* Surface application
* Sub-surface application (e.g., fuel tanks, oil tanks, injection inside liquid)
## Footnote
These methods ensure that foam reaches the fire effectively.
245
What may displace foam?
* Water
* Air
## Footnote
Displacement can reduce the effectiveness of foam in extinguishing fires.
246
Explain the advantages of the detection method used in a suprotex system.
Adjustable, more sensitive (rate of rise is more sensitive type system)
## Footnote
This sensitivity is crucial for detecting slow fires that may not trigger other systems.
247
How can the speed of the thermal pneumatic detection system be increased or modified?
By adjusting the vent rating or mercury level
## Footnote
These adjustments can enhance detection speed and accuracy.
248
Define HAD and how they operate.
Heat Activated Device; operates with an increase in temperature
## Footnote
HADs are essential for automatic fire detection systems.
249
List one area where the rate of rise system is often used.
In environments with fluctuating temperatures
## Footnote
This system helps in environments where temperature changes can indicate fire risk.
250
What is used to supervise the thermal system and sprinkler piping in the rate of rise system?
Air pressure in the pressure switch
## Footnote
This supervision prevents false alarms and ensures system integrity.
251
Outline the function of mercury checks in a rate of rise system.
Prevents false alarms
## Footnote
Mercury checks help ensure that only genuine temperature rises activate the system.
252
What happens if the rate of rise temperature is not sufficient to operate the valve?
The fixed temp fail safe and manual pull station activate
## Footnote
This provides an alternative method to trigger the system.
253
How can the rate of rise system be arranged to contain air in the sprinkler piping?
Using a check valve to supervise the pipe
## Footnote
This arrangement helps maintain system pressure and prevents air loss.
254
How is a suprotex system tripped manually?
By releasing weight
## Footnote
This manual activation is crucial for emergency situations.
255
How is an OS&Y gate valve supervised?
With a tamper switch, chain and lock, sealed
## Footnote
Supervision ensures the valve remains secure and functional.
256
What is the setting of the pressure switch supplied with the electric air pump panel for the suprotex system?
1-1.5 psi low pressure, measured in ounces
## Footnote
Proper pressure settings are essential for system operation.
257
For owners with air supply and pressure less than 100 psi, what must be used to make it acceptable for a suprotex system?
Low pressure regulator
## Footnote
This component ensures that the air supply meets system requirements.
258
What instrument is used to set and test mercury checks in suprotex systems?
manometer
259
If an H.A.D. is punctured, what is the result?
supervisory
260
Name two devices used on pneumatic detection lines today.
* Pilot line detector
* c1/c2
261
Explain the procedure for resetting a suprotex system after operation.
* Close main control
* Face plate off reset clapper
* Reset weight
* System pressure
262
Describe the procedure for heat testing suprotex systems.
* Heat gun
* Steam
* Hot water
263
How are control valves in a sprinkler system supervised?
* Electrically
* Locked
* Seal
264
At what interval shall control valves be inspected?
quarterly
265
What should a completed control valve inspection report reveal?
266
What maintenance will be carried out on P.I.V. valve stems?
Lube stem
267
At what frequency is maintenance on P.I.V. valve stems carried out?
annually
268
How will post indicator valves be tested and positioned to avoid jamming?
Fully open to closed
269
List three important facts to remember when making alterations and repairs in a sprinkler system.
* Only shut off when ready for connection
* Authorities
* Fire watch
270
What is required when it is necessary to shut off a portion of the sprinkler system overnight?
Signature
271
Why should broken hangers be replaced promptly?
Puts additional weight on other hangers
272
When shall dry system auxiliary drains be used?
Remove condensation
273
List four items that will be inspected on a system at the approach of freezing weather.
* Heat trace
* Low points
* Anti-freeze solution
274
Explain when sprinklers must be replaced without testing.
Painted or damaged
275
How shall a valve room be heated?
Permanent heat source
276
When is it most important that no water be in a dry pipe system?
Freezing season
277
When shall the dry pipe valve be thoroughly cleaned and reset?
annually
278
List the sealing materials that are used on the seats of dry pipe valves.
none
279
How would you know when a dry pipe valve had been tripped and tested?
should have a tag on it
280
At what interval shall the air pressure in a dry pipe system be checked and corrected?
Super-monthly non-weekly
281
Why shall the full water pressure be used when the dry pipe valve is being tested?
See proper function
282
Describe what must be done before any dry pipe valve is tripped.
Notify monitoring
283
What test for operation under service conditions shall be employed?
* Alarm test
* Main drain flow test
* Low pressure
* Supervisory switch
284
What will help to keep quick opening devices in good operating condition?
Proper maintenance
285
10. How can you avoid becoming unbalanced on a ladder?
Keep sternum between the ladder rails
286
When does a scaffold require bracing?
When vertical more then 3x the minimum lateral distance
287
Which foot should be used to operate the foot pedal?
Left foot
288
What are two types of portable ladders used in construction
Self supporting/straight ladders
289
What is the colour code of a CSA grade 1A step ladder?
Red, orange, or yellow. Type 1A standard 300lbs
290
What is the maximum weight load for a CSA grade 1 step ladder?
250lbs
291
What is the maximum height of a step ladder?
20 feet
292
What is the purpose of using a ladder on site?
Access an egress
293
What is the safe distance off the wall when erecting an extension ladder 32 feet
8 feet
294
What is the minimum distance on extension ladder must pass the platform of the upper level
3 feet
295
What does three-point contact mean?
2 feet one hand, two hands one foot
296
What is the highest step you can step on on a step ladder?
Second from the top
297
How can you avoid becoming unbalanced on a ladder?
Keep your sternum between the ladder rails
298
When does a scaffold require bracing?
When vertical more than **3x** the minimum lateral distance
299
Do you require FAS while working on a scaffold?
> 8 feet
300
What is the maximum height of a tubular scaffold?
30 feet
301
What is the maximum distance from a structure without the use of lateral bracing?
3 inches
302
What is the minimum width of scaffold planks?
18 inches
303
Name three types of scaffolds
Tubular, walk-through, rolling, foam waggon
304
What is the minimum and maximum height above the plank a top rail should be installed
3 ft to 3ft 7”
305
What is the maximum height of a tow board?
3 1/2 inches
306
What is the maximum lateral load of the top rail?
152 pounds of force
307
How many volts shall a hardhat be able to withstand?
20,000 V
308
How much force shall Work boots be able to resist protecting?
167 foot pounds
309
At what height shall fall of attraction be required
> 10 feet
310
What is the safest fall protection to utilize whenever possible?
Travel restraint
311
What is the least effective fall protection?
Safety nets
312
What class harness should be used for a fall arrest system
Class a
313
What type of shock absorbing lanyard shall a 260 pound worker where
E6 shock absorbing lanyard or hybrid shock absorbing
314
What are the four components that make up a fall arrest system
Full body harness, lanyard, shock, absorber, anchor point
315
What does a green triangle indicate on Work Boots?
Soul, puncture protection, grade one protective toe cap
316
What symbol is used to indicate electric shock protective footwear
White rectangle with orange Greek letter omega
317
What are the hierarchy of controls for hazard?
At the source, along the path, at the worker
318
What does CSA stand for?
Canadian standard Association
319
What CSA class are standard safety glasses with side protection
CSA class one
320
What class hardhat is used in construction
CSA class E type 2
321
Name the two types of respirators
Air purifying or air supplying
322
What types of testing are required before the use of a respirator?
Negative and positive seal test, qualitative, quantitive fit test
323
What type of fall protection is required using EWP’s
Travel restraint system
324
When are you permitted to detach your lanyard while working on a scissor lift?
When the lift is not in motion
325
What class harness uses a D ring?
Class L
326
What class harness is used for evacuation of a worker?
Class E
327
What are the hierarchy of controls?
Source, path, worker
328
If a worker is convicted under the act/regulations, what is the maximum fine or prison term?
$100,000/12 months
329
What are the three rights of workers under the act?
Know, participate, refuse
330
Six hazard categories
Chemical, biological, economic, physical, psychosocial, safety
331
How high above a platform must an extension ladder extend
3 feet
332
When using an extension ladder, what is the ratio used to determine the distance out from the wall at the base of the ladder?
4:1
333
See the most suitable material of ladder to be used around live electrical power
Fibreglass or wood
334
Explain how to properly use a pipe wrench
Pull on wrench
335
State what is to be done when more leverage is required when using a wrench
Use a larger wrench
336
What type of wrench is preferred when installing hose valves?
Spud wrench
337
What type of screwdriver that can be turned by a wrench
Square blade
338
What type of punch could be used for lining up bolt holes on a flange?
ALining punch
339
Identify the type of punch which is used to ensure proper location of a hole when drilling into a pipe
Centre punch
340
Identify the best course of action when a puncture chisel begins to mushroom
Replace punch/chisel
341
How many revolutions of the pipe should you allow after the roll? Grover has reached it steps.
Two
342
Say the minimum length of pipe permitted to be roll grooved for pipe sizes up to 5 inch
8 inch’s
343
Identify the recommended maximum length of pipe which can be roll grooved without using a pipe stand
36 inches
344
What does a pie tape measure?
Circumference
345
Formula for turning Celsius to Fahrenheit
1.8 x C + 32
346
Formula for turning Fahrenheit to Celsius
(F-32)
———
1.8
347
While roll grooving, what must be done to keep the pipe end from flaring
Lower end to level with with roll groover
348
Type of file which can be used to make a groove in the stem of an OS&Y gate valve for installation of a tamper switch
Rat Tail
349
