QUIZ 2 Flashcards by Christian Konn

The mixing valve assembly provides
heated water to the shower heads at
what temperature?

105°F

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What percentage of the effluent from a
septic tank is composed of suspended
solids?

40% to 60%

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The shower stand should be erected at

what distance from the mixing valve?

20 feet

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The working load on a medium-duty
scaffold must not exceed how many
pounds per square foot of platform
surface?

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The tap is normally in what location on

a water main?

Top

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

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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 inches

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What term describes the plumbing
receptacles into which wastes are put
before being discharged into the
sewer?

Fixtures

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What type seal is commonly used
between a water closet bowl and a
water closet flange?

Preformed sealing ring

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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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All automatic sprinkler systems have which of
the following characteristics in common?

Water supply
Piping network
Sprinklers
Each of the above

Each of the above

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When performing a deluge valve dry trip-test in
a flammable area, you should use what test in
place of the electric test set?

Hot water or hot cloth

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On what stroke of a gasoline engine is

air admitted to the engine?

Intake

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The liquid in a diaphragm is made to

move by what kind of motion?

Reciprocating

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By what means are mechanical seals

positioned on the shaft?

Stub or step sleeves

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The function of what component of a
duct system is designed to deliver a
concentrated air stream into a room?

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Standard air-conditioning certification
is divided into levels corresponding to
the type of service a technician
performs. How many types of
technician certification are there?

Three

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Cooling towers are classified as

natural draft, induced draft, or

Forced draft

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What type of heat is absorbed or given
off when the physical state of a
substance is changing?

Latent

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A total of how many Btu is required to
raise 5 pounds of water from 40°F to
165°F?

625

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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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Which of the following types of motors should
be used for a 5-horsepower, high-starting
torque requirement?

Capacitor-start, capacitor-run

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When you want to preserve the freshness of
fruits and vegetables, you should use what
type of evaporator system?

Spray

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Which of the following electrical components
is NOT part of a load circuit shown in a
hermetic system schematic wiring diagram?

Thermostat

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You are installing warning signs for a new water treatment plant. Specifications for the signs are covered in what division?

Specialties

The air-lift pump can deliver large | quantities of water at

relatively low pressures

Horizontal lines in an isometric | drawing are projected at what angles?

60° and 30°

When maintenance on a structure requires a change to the record drawing, you should pass this information to which of the following departments?

Operations or maintenance control

As a supervisor, you should refer to what documents as the chief source(s) of information during a construction project? * Construction drawings * Project specifications * Bill of materials * Each of the above

Each of the above

To determine the point where service taps should be connected, you should use which of the following plans?

Plot

What value must increase when you want to increase the boiling point of water?

Pressure

Which of the following factors is a disadvantage of the vertical fire-tube boiler?

It has a limited capacity

What device allows the boiler operator to determine the water level in the boiler?

Gauge glass

At what time intervals should you check the boiler settings for external air leaks?

Every 24 hours

What precaution should you take before making a hydrostatic test of a boiler?

Gag the safety valves

Before a boiler is lighted off, which of | the following valves must be opened?

Feedwater stop and check

The pressure gauge on a boiler should be | tested at what intervals?

Semiannually

The continuous blowdown should be regulated to maintain what ppm of TDS in a steaming boiler?

3,000 to 4,000

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 portion of the venting system extends above the highest fixture branch?

The main soil and waste vent

A long-hubbed fitting used for insertion into an existing line is called a/an

sisson

A measurement was taken from the end of a pipe to the center of a fitting. What type of measurement was used?

End to center

What are the two types of duct | insulation?

Inside and outside

A valve is installed in the most desirable position when the valve stem is pointing in what direction?

Straight up

Which of the following items should you use to air test a waterline, for leaks?

A soapy water solution

How should in-stock diaphragms be | stored?

Underwater

The blower should be inspected for internal corrosion or deterioration at what intervals?

Annually

``` To remove organic growth from the watersides of the removable plates of a porous ceramic diffuser, you should use a 50-percent solution of what type of acid? ```

Nitric

What type of solution is used to detect | a chlorine leak?

Soapy

What type of waterborne disease | requires a carrier to infect people?

Schistosomiasis

What condition must be present for groundwater to constitute a water table?

Stabilized

There is a total of how many classifications of | wells?

For a normal field water supply, what type of | water source is the most accessible?

Surface

The pump and power unit used for testing a well should be capable of continuous operation for a minimum of how many hours?

You should use what type of solvent to remove rust from a domestic dishwasher?

Air-inhibited sulfamic acid

If a heating coil is restricted, the condition will be shown by which of the following readings?

30 psi or greater above normal

``` 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

Natural gas has which of the following | characteristics?

It is odorless and colorless

On what two factors does the operation of the draft regulator depend?

Balance and free action

Sensible heat plus latent heat equals | what type of heat?

Total

A thermodynamic trap is usually constructed from what type of material?

Stainless 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

The hermetically sealed bellows of an air vent contains a volatile liquid that has a boiling point that is how much lower than that of water?

10°F

What is the normal color of wastewater | containing dissolved oxygen?

Gray

Which of the following tests should be used as a control test to help you decide whether to increase or decrease the rate of sludge return?

MLSS

When decay proceeds under anaerobic conditions, what is the ultimate result? * Offensive odors * Unsightly appearances * Offensive conditions * Each of the above

Each of the above

Rainwater is generally considered an electrolyte | because it contains

Dissolved atmospheric gases

What person is responsible for communicating requirements to other companies and departments?

The supervisor

Which of the following coatings is best suited for use as a corrosion inhibitor on exposed steel pipelines suspended along piers?

Coal tar

When testing e system with dry air or nitrogen, you should use what percentage of maximum working pressure for a minimum of 4 hours?

75%

A refrigerant dryer with a dew point at what maximum temperature should be used to remove moisture to meet air quality requirements for instrument and control air?

30°F

High-pressure systems provide compressed air | within what pressure range?

400 psig to 6,000 psig

What type of joint is used to absorb expansion | and contraction in a duct system?

Fabric

What factors influence the performance of a fan in a ventilation system? * Static pressure and rpm of the fan * Voltage and amperage of the fan motor * Total airflow in the ventilation system * Each of the above

Each of the above

The type of material used for duct lining and | covering must have what characteristic?

It must be noncombustible

Energy from the sun is received by the earth | in what form?

Radiation

What substance is added to water to make | it a useful collector fluid?

Ethylene glycol

What is the most commonly used substance | for collector covers?

Glass