QUIZ 1 Flashcards
The Facilities Planning Guide has two
volumes, each with three parts. You
can locate plot plans for components
in
Volume 1, Part 1
The portable bath unit operates on
what voltage?
208 V
When a solution of sodium
hexamethphosate is added to the
ROWPU, it prevents what condition
from occurring in the filters?
Scaling
A hydrant should be located
approximately how many feet from a
building?
50
You should install which of the
following components to protect the
water from contamination?
Backflow preventer
Scouring and damage to the pipe may
happen when wastewater moves more
than how many feet per second?
8
When a wall-mounted urinal is
installed, the distance between the
floor and the lip of the urinal should
not exceed
25”
The amount of water being discharged
from a plumbing fixture per minute is
measured in fixture units. How many
gallons equal one fixture unit?
7 1/2
What device controls the amperage in
an alternating-current circuit to thaw a
frozen pipe?
Transformer
What type of automatic sprinkler system
should you use in an aircraft hangar?
Water-deluge
When debris in the water is a problem, you
should use what type of dry-pipe valve?
Low differential
In a differential dry-pipe valve system, the air
must be maintained at least how many psi
greater than the trip pressure?
20
When warming up a diesel engine, you
should allow how much time for the
lube oil pressure gauge to show
enough positive pressure?
30 seconds
Which of the following instruments
should you use to check alignment of
the shaft in a centrifugal pump?
A dial indicator
Air-lift pumps are used for which of
the following pumping applications?
Wells
Cooling towers are classified as
natural draft, induced draft, or
forced draft
The oil level in the compressor of an
air-conditioning system should be
checked
Weekly
What two chemicals form a hard scale
on the walls of water tubes that reduce
their efficiency?
Lime and iron
When using two compressors and the condensers are more than 10 feet above the compressors, you should install what additional component in the horizontal discharge line?
Oil seperator
Which of the following factors is not
an advantage of a hermetically sealed
compressor?
Increased working capacity
What type of condenser is used where
low-quality water and its disposal
make the use of circulating watercooled
types impractical?
Evaporative
An external equilizer line is required when
what pressure drop exists across an
evaporator coil?
7 pounds
When working on an ammonia-absorption
refrigeration system, you need what type of
manifold gauges?
Steel
Of the following considerations, which one is
most important when you are mounting a
condenser on a roof?
The roof load strength
Horizontal lines in an isometric
drawing are projected at what angles?
60° and 30°
What color code indicates flammable
material?
Yellow
Electrical thawing has what primary
advantage over steam thawing?
It is faster
When drawing a working sketch, you should
perform what step first?
Draw the symbols used for components
What document is used to present notes and
information in tabular form?
A schedule
What type of line is used to show the center of
a line or fitting?
Center
What type of fusible plug can be
replaced without taking the boiler out
of service?
Steam actuated
The blowdown pipe of a vertical firetube
boiler is attached to the
lowest part of the water leg
When a steam injector is started, the
water supply valve should be turned
a full turn
On a steam boiler, the head
mechanism of the low water cutoff
devices should be removed from the
bowl for cleaning at least once a
Month
Which of the following methods
should you use to test the safety valves
after completing a hydrostatic test on a
boiler?
Steam pressure
What temperature is required to bake
out plastic refractory?
2900°F to 3000°F
As a minimum, high-pressure, HTW, and
MUSE boilers require a hydrostatic test at
what intervals, in years?
3
Improper fabrication of tubes is most likely to
result in which of the following conditions?
Wall lamination
When testing the functions of automatically or
manually controlled devices that interfere with
steam distribution, you should ensure that
which of the following main distribution valves
is/are closed?
Main steam
What weight of pipe is adequate for
most Navy base construction?
SV
When you solvent weld PVC pipe, the
surrounding air should NOT be above
what temperature?
90°F
Which of the following types of 90-
degree Y-branches can be used as an
individual vent?
Double
In a properly ground-in valve, the
contact area should cover
approximately what fraction of the
seating surface?
One third
When a straight-reading dial on a
water meter reads 000782, you should
record the reading in what manner?
00000782
Vertical fixture risers must be
supported at a change of direction and
at
each floor level
Spray nozzle aerators should have
nozzles removed at what intervals?
Only as necessary
How often should the exterior shell of
the ion-exchange unit be cleaned and
painted?
Annually
A pot type of solution feeder sediment
trap should be cleaned at which of the
following times?
Monthly
Clearing water of foreign suspended
matter by a natural settling process is
known as
Sedimentation
Chlorinators may be classified by
what two types of feed?
Solution and direct
What process comes first and last in
making water safer for consumption?
Chlorination
When developed properly, springs yielding a
minimum of how many gallons per minute can
be used as a source of field water?
20
At what level of government is the title to
ground and surface water normally regulated
within the United States?
State
A well can normally be bored within what
maximum depth without fear of a cave-in?
60 feet
What department is responsible for
conducting sanitary inspections of the
galley?
Medical
After filling a domestic dishwasher with hot water and an approved cleaning solution, you should then operate the machine at high temperature for what length of time?
30 minutes
When the air-oil mixture of a range is
correct, the flame should be what
color?
Blue
When operating an HTHW system,
you should ensure the water is within
what pH range?
9.3 to 9.9
The amount of heat added to a
substance above its boiling point is the
definition of what term?
Superheat
You should use what size and type of
tubing from the oil tank or valve to the
burner?
1/2-inch seamless steel
In the two-pipe vapor distribution system, what component returns the condensate to the boiler and maintains the vacuum or subatmospheric pressure in the return system?
Vacuum pump
What component of the float
thermostatic trap activates the
discharge valve?
Bellows
What are the two types of major
underground steam distribution
systems?
Utilidor and conduit
What is the normal color of wastewater
containing dissolved oxygen?
Gray
An Imhoff cone should be used to perform
which of the following tests?
Activated sludge
A COD test can be performed in a minimum of
how many hours?
1
Copper pipe is advantageous as a hot-water
supply line for which of the following reasons?
It resists corrosion
A stop and waste valve is used for what
purpose?
To drain the building water system
Which of the following types of pipe is most
susceptible to microbiological corrosive action?
Steel
Air compressor filter systems should be able to
remove particles in what micron size range?
1 to 3
Of the following types of intake filters, which
one(s) is/are best suited for use in locations
where dust is prevalent in the atmosphere?
Oil bath only
Air filters should be checked and cleaned a
minimum of how often?
Monthly
When computing duct size, you should first
perform what calculation?
Air volume
You can gain efficiency by installing what
type of elbow in a duct system?
Long, sweeping
In a low-velocity system, the duct velocity is
normally less than how many feet per minute?
2,000
What is the percentage of transmissivity for
standard plate glass?
86%
During what hours of the day does most of
the useful energy collection take place?
0900 to 1500
Which of the following types of collectors uses
a vacuum between the absorber and the glass
outer tube to reduce convection and
conduction heat losses?
Evacuated tube
