Font size
WorksheetsSprinkler Fitting level 3
Total questions: 112
Worksheet time: 1hrs 1mins
A typical deluge system application would be____________.
restaurant dining areas
conveyors
supermarkets
any industrial structure
Relative to the deluge valve, the fire department connection is located ______________.
upstream
anywhere convienant
downstream
to prevent flooding of the municipal water supply
In a deluge valve, the release system operates the ___________ chamber.
inlet
valve
outlet
priming
Most manufacturers require that the hydraulic release line piping be a minimum of __________.
1/4"
1/2"
5/8"
3/4"
Returning the manual emergency release to the closed position will stop water flow through the deluge valve.
True
False
A deluge release system that can only be installed where the ambient temperature can be reliably maintained at 40-degrees For above is a (n) ________ release.
pnumatic
electric
fixed-temperature
hydraulic
Standard sprinklers, fixed-temperature, rate-of-rise, and manual emergency release devices are used with __________.
pneumatic release lines
pneumatic and hydraulic release lines
hydraulic release line only
electric release line only
In the normal sequence of operation of an electric release mechanism, the next thing that happens after the solenoid valve opens is ____________.
the electric release devices activates
the control panel energizes
water drains from the priming chamber
water is held in the priming chamber
In an electric release system, the purpose of the release control panel is to _____________.
discharge water to all open discharge devices
drain water from the priming chamber
send power to the solenoid valve
activate the alarm mechanism
The sprinkler fitter is responsible for trouble-shooting and repairing all detection systems.
True
False
If a fixed-temperature supplemental detector is selected for operation at 190-degrees F, the automatic sprinklers will be selected to operate at ____________.
100-degrees F
155-degrees F
165-degrees F
212-degrees F
The area to the side and below heating ducts gets an intermediate degree rating at ___________.
1'-0" or less
more than 1'-0"
2'-6" or less
more than 2'-6"
Protectowire is installed in _____________.
limited-lengths runs only
continuous runs with no than two taps
continuous runs withouts taps or branches
ceilings only
The least specified and least installed preaction systems is the ___________ system.
single-interlocked
combination-interlocked
double-interlocked
non-interlocked
Preaction systems other than single interlocked reaction systems require a minimum of __________psi in the piping.
5
7
8
10
In order for the deluge valve in an electric-pneumatic double-interlocked system to open, the pneumatic actuator and solenoid valve must ___________.
not open
operate exactly at the same time
be open at the same time
both open within 12 seconds
Under normal conditions in a double-interlocked water control valve, the water pressures under the clapper and the differential chamber are ____________.
very high
equal
low
zero
After setting up the Grunau / Star single valve double-interlocked valve, no leakage or water flow should occur through the velocity drip check.
True
False
A primary feature of the fire cycle system is that __________.
it is non-proprietary
it is water-based only
the manufacturer is not involved with system installation
if the fire rekindles, the system will reactivate
Firecycle detectors have normally closed contacts and are wired in series ___________.
for temperature control
which allows faster operation
so they can be supervised
so they can easily be maintained
When a fire is suppressed, Firecycle system action energizes a timer that __________.
delays the system operation for 20 minutes
is used to turn off the fire alarm
allows water to discharge for a predetermined time
shuts the flow control diaphragm
Firecycle detectors _____________.
operate at variable temperatures
are not rate compensated
are unaffected by bending or denting
will automatically recycle
A significant feature of the Firecycle III system is that it ________.
is a single-interlocked system only
uses the same components as the previous Firecycle systems
is four different types of cycling systems
not compatible with Firecycle II detectors and detector cables
When it is necessary to deviate from shop drawings due to job conditions, the layout technician and the estimator are notified after the work is done.
True
False
Deluge and preaction systems ____________.
are hydrostatically tested with open nozzles
require the same pressure test as wet and dry systems
are tested with dry-pipe valves locked closed
use the DPV clapper as a pressure closure
Standpipes are considered either ___________.
Class II or Class III
wet or dry
automatic or semiautomatic
commercial or residential
The location and size of the construction standpipe is determined by the ___________.
sprinkler fitter
superintendent
layout technician and AHJ
sprinkler fitter foreman
A standpipe system connected to a water supply that supplies the system demand any time required is called a (n) ________ system.
combined
automatic wet
manual
dry
In tall buildings, standpipe systems are often divided into zones to limit system pressure exerted on fittings and components. Pressure limiting is done by reducing the height of the water column through zones.
True
False
Piping supplying the standpipe system is to be sized by what method criteria or method?
Pipe schedule
All structures over 75 feet tall require 6" standpipes
All structures over 30 feet tall but less than 75 feet tall require 4" standpipes
Hydraulically
NFPA 14 requires actual flow test of newly installed standpipe system when ___________.
the system has pressure-reducing valves installed
the system utilizes a fire pump in the water supply
it does not matter; all new systems require a flow test
it does not matter: new systems never require a flow test
A class I standpipe system is calculated to provide a minimum residual pressure at the top most 2-1/2 inch outlet of ___________ psi.
65
100
125
150
The main drain connection is required to terminate where the discharge ___________.
can be collected
rate can be measured
will not damage the surrounding area under full flow
can be observed for foreign objects
The size of the main drain connection for standpipes sized four inches and larger is __________ inches.
3/4
1-1/4
2
2-1/2
When the maximum pressure of new systems is over 150 psi, the new system must be hydrostatically tested at ________ psi over the maximum pressure.
20
25
50
75
If an interim air test is conducted in lieu of the standard hydrostatic test, this air pressure leakage test is done for 24 hours at _________ psi.
20
30
40
50
The person responsible for ensuring that the system hydraulic information sign is made available and attached appropriately is the _________.
AHJ
layout technician
job superintendent
sprinkler fitter
All standpipes within a given structure are required to be __________.
interconnected
exactly the same size
activated independently and separately
minimum 6" diameter
The maximum flow capability for class I and class III standpipes for unsprinklered buildings is ___________ gpm.
250
500
1,000
1,250
All fire departments must use national standard hose threads.
True
False
Hose connections and stations must be located not less than three feet above the floor or not more than _______ feet above the floor.
4
5
6
8
The 130-foot travel distance limitation from all parts of each floor to a hose connection does not apply to ________ systems when the exception is taken sprinklered buildings.
Class I
Class II
Class I ir Class II
Class III
Underground pipe that supplies the standpipe system must be flushed and tested per ___________.
NFPA 12
NFPA 14
NFPA 20
NFPA 24
For roof manifolds, usual building code requirement is for a __________ outlet.
single
dual
three-
four-
NFPA 14 requires an approved PRV to limit pressures at any hose valve to _______psi.
50
75
100
125
The single largest cause of PRV failure malfunction is ________.
excessive presure
improper sizing
debris
inadequate pressure
For pip with a nominal diameter of six inches, the minimum nominal pipe sleeve size is ___________ inches.
8
10
12
13
NFPA 13 requires that a riser with offsets be clamped (supported) ________ the offset.
below
above
above and below
directly
Specific gravity is a measure of the ___________.
viscosity of the water
weight of a column of water 33.9 feet high
weight of 29.92 inches of mercury
relative weight of substances
Water begins to covert to ice crystals at __________.
32.0-degrees F
32.9-degrees F
39.0-degrees F
39.2-degrees F
One critical aspect of a fire sprinkler water supply is _________.
it must be potable
the duration must be adaquate
it must be from a municipal water supply
it must deliver 200 psi minimum
Fire pumps are selected based on ___________.
flow and pressure calculations
pump-driven horspower
NFPA 13D
NFPA 24
The type of water supply tank used, its capacity, location, foundations, and other features are specified by __________.
NFPA 13
NFPA 13D
NFPA 20
NFPA 22
The nitrogen-driven pressure tank for NFPA 13D residential use is primarily designed for applications requiring a ________ minute duration.
5
10
15
20
An example of community infrastructure is ____________.
roads, schools, and dry-pipe systems
power plants, and municipal water supplies
underground piping, risers, and fire pumps
riser,sprinkler mains, and wet-pipe systems
Under normal conditions, the result of gridding is that every potential tap location _________.
will be supplied from exact North-South and East-West directions
will be supplied from four locations
will not have valve piping
will be supplied water from two directions
A measure of the available line pressure prior to flowing the hydrant is __________.
static pressure
residual pressure
flow pressure
relief pressure
The test that measures the system supply capability at a particular time and season is a _______.
static pressure test
residual pressure test
flow test
simulated fire flow test
When conducting a flow test, a difference in elevation between the static/ residual measuring point and the flow hydrant is important.
True
False
Pilot gauges should be calibrated by a testing laboratory_________.
after each use
quarterly
annually
every five years
Velocity pressure is measured using a _________.
normal pressure gauge
dial indicator gauge
PRV
pilot tube
When conducting a flow test, the pressure gauge reading is determined by __________.
taking the mean of the high reading and the low reading
using the low reading
using the high reading
averaging three odd the low readings
NFPA 13 states that meters are prohibited from use on sprinkler systems.
True
False
The type of meter used when flow rates are substantial most of the time is a _________.
compound meter
disc meter
turbine meter
strainerless compound meter
Pressure losses between strainer and no strainer meters are significant.
True
False
Approved back flow protection assemblies are generally not required for AWWA fire system Class(es) _______.
1 and 2
3
4
4 and 5
In a reduced pressure back flow preventer, the relief valve opens when ________.
RP zone pressure drops below supply pressure
RP zone pressure increases toward supply pressure
demand for water increases
there is a pressure loss across the inlet check valve
So that the automatic water supply does not leak out through the FDC, a ________ must be installed in the FDC line.
double check back flow preventer
reduced pressure detector assembly
double detector check assembly
check valve
The sizes of the relief valve and relief valve discharge line are established by NFPA 20. The nominal size of the discharge line is two sizes larger than the valve itself.
True
False
The system that allows water to flow around the pump if the fire pump fails is the __________.
pressure-relief valve
check valve
testting mechanism
bypass
As the rate of flow through a strainer increases, the head loss __________.
decreases
doesn't change
increases
is not affected in flow-through strainers
Entrained air in the pump casing ____________.
has little, if any affect on the pump out put
enhances pump delivery
is automatically expelled
is related by the check valve
According to NFPA 20, it is never permissible to pipe the discharge from the pressure-relief valve back to the suction side of the pump.
True
False
When mounting a pump and driver, an acceptable formula for grout is ______________.
three parts cement, one part sand, little water
one part cement, three parts sand, little water
three parts cement, one part sand, three parts water
one part cement, three parts sand, four parts water
If there is no positive head pressure on the intake or suction side of a centrifugal pump, a _____________ must be used.
vertical turbine
split-case
in-line
horizontal end suction
Split-case pumps are rated from _____________.
35 to 1,500 gpm
100 to 500 gpm
100 to 5,000 gpm
250 to 5,000 gpm
To convert feet of head to psi, multiply by ___________.
0.433 psi/ft
6.894 psi/ft
433 ft
6,894.757 ft
NFPA 20 requires a pump at 65 percent of its pressure rating to deliver ___________ percent of its rated volume.
100
125
150
175
The two basic requirements for electric drivers to function are _____________.
adequate electrical input and ventilation
conformance with NFPA 13 and NFPA 22
light loads and protective guards
conformance with NFPA 13R and NFPA 24
NFPA 20 requires that the power supply to the fire pump be routed outside of building or _____________.
encased in 6 inches of concrete
through an equivalent of four hours of fire resistance
encased in 2 inches of concrete
have at least one disconnect in the pump feeder circuit
The type of controller designed to reduce hydro-mechanical stress in the sprinkler system is a __________ controller.
across-the-line
soft-start
primary resistor,reduced voltage
wye-delta
Variable-speed controllers are deigned to control pump output pressure by ___________.
limiting the power available to the pump
allowing the pump to free-wheel
controlling suction pressure
controlling the speed of the pump
A transfer switch assembly consists of the transfer switch and _________.
inrush current limiter
sensing control module
a step-down transformer
starting-mode resistors
NFPA 20 requires dual battery charging capabilities in diesel-drive controllers.
True
False
If water pulsation causes erratic operation of the pressure switch on a sensing line, a _________ may be required.
1/2-inch globe valve
supplemental test connection
control panel
supplemental air chamber
In sensing line arrangements, drilled orifices may not be used in place of check valves.
True
False
The UL Playpipe is the only accepted method of testing fire pump capability.
True
False
In an electric fire pump flow test, the pump should be tested at a minimum of ____________ test point(s).
1
2
3
4
When inspecting a pump room, the most important item to be considered before entering the room is __________.
access
pump capacity
safety
pipe layout
Piping should be installed so that the fire pump carries less than 100 pounds of the piping system weight.
True
False
Grouting a pump foundation should be done __________.
before pump alignment
after pump alignment and after running the pump
at any convenient time
after pump alignment and before running the pump
The primary purpose of an engine block heater is to ________.
keep the engine from freezing
prevent condensation
assist in the cranking cycle
loosen sluge
Nozzles are designed to be used _____________.
to achieve appropriate thermal sensitivity
to minimize the effects of obstructions
as protection for special hazards such as switching equipment
under horizontal or slopped ceilings
Residential Sprinklers are designed to _____________.
produce a larger water droplet
distribute water at a high point on the wall
throw water down both sides of a pitched roof
have extra large K-factors
Extended coverage upright and pendent sprinklers with a protection area of 144 square feet for high-piled storage can be spaced a maximum distance of _____________ feet apart.
15
16
18
20
Extended coverage upright and pendent sprinklers may be installed within trusses where trusses are spaced greater than ____________ feet on center.
7-1/12
10
12
14
In special cases, extended coverage sidewall sprinklers have been listed for use under smooth, flat ceilings with slopes up to ___________.
3 inches per foot
4 inches per foot
5 inches per foot
6 inches per foot
Extended coverage sidewall sprinklers can cover an area of up to ___________.
200 sq ft
300 sq ft
400 sq ft
450 sq ft
Residential sprinklers are designed to limit temperature 3 inches below the ceiling to _____________.
500-degrees F
550-degrees F
600-degrees F
650-degrees F
The maximum spacing for CMSA sprinklers under obstructed combustible construction is _____________.
6 feet
8 feet
10 feet
12 feet
Under normal conditions, the temperature rating of an ESFR should be ___________.
150-degrees F
165-degrees F
180-degrees F
200-degrees F
ESFR sprinklers can be spaced up 19 feet apart because of their higher level of performance.
True
False
In-rack sprinklers must be __________ degree rated.
intermediate
high
ordinary
any
Dry sprinklers must be installed in a tee.
True
False
In general, institutional sprinklers _____________.
have special spray patterns
are relatively difficult to install
are available only as standard coverage pendents
are available only as extended coverage sidewalls
Specially designed attic sprinklers positioned at the peak of a sloping roof can protect a roof up to _________.
40 feet wide
50 feet wide
60 feet wide
70 feet wide
All back-to-back attic sprinklers must be installed at least _______ inches away from the face of the truss.
2
4
6
8
The minimum spacing between hip sprinklers is _____________.
2 feet on center
3 feet on center
4 feet on center
6 feet on center
The maximum spacing between attic sprinklers is ___________.
2 feet on center
4 feet on center
6 feet on center
8 feet on center
Sprinklers that have been turned into nozzles by removing the actuating elements are called ___________.
conical pattern nozzles
frame-style spray nozzles
open sprinklers
cooling tower nozzles
Strainers are important where small orifice nozzles of less than _______ inch are installed.
5/32
7/16
3/8
1/2
Listing agency testing of corrosion-resistance coatings and frame materials is applicable to all known corrosive atmospheres.
True
False
