QUIZ 1 Flashcards by Christian Konn

The Facilities Planning Guide has two
volumes, each with three parts. You
can locate plot plans for components
in

Volume 1, Part 1

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The portable bath unit operates on

what voltage?

208 V

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When a solution of sodium
hexamethphosate is added to the
ROWPU, it prevents what condition
from occurring in the filters?

Scaling

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A hydrant should be located
approximately how many feet from a
building?

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You should install which of the
following components to protect the
water from contamination?

Backflow preventer

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Scouring and damage to the pipe may
happen when wastewater moves more
than how many feet per second?

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When a wall-mounted urinal is
installed, the distance between the
floor and the lip of the urinal should
not exceed

25”

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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

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What device controls the amperage in
an alternating-current circuit to thaw a
frozen pipe?

Transformer

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What type of automatic sprinkler system

should you use in an aircraft hangar?

Water-deluge

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When debris in the water is a problem, you

should use what type of dry-pipe valve?

Low differential

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In a differential dry-pipe valve system, the air
must be maintained at least how many psi
greater than the trip pressure?

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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

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Which of the following instruments
should you use to check alignment of
the shaft in a centrifugal pump?

A dial indicator

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Air-lift pumps are used for which of

the following pumping applications?

Wells

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Cooling towers are classified as

natural draft, induced draft, or

forced draft

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The oil level in the compressor of an
air-conditioning system should be
checked

Weekly

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What two chemicals form a hard scale
on the walls of water tubes that reduce
their efficiency?

Lime and iron

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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

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Which of the following factors is not
an advantage of a hermetically sealed
compressor?

Increased working capacity

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What type of condenser is used where
low-quality water and its disposal
make the use of circulating watercooled
types impractical?

Evaporative

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An external equilizer line is required when
what pressure drop exists across an
evaporator coil?

7 pounds

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When working on an ammonia-absorption
refrigeration system, you need what type of
manifold gauges?

Steel

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Of the following considerations, which one is
most important when you are mounting a
condenser on a roof?

The roof load strength

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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?

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?

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?

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?

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