Final test Flashcards
What is a water Service
From water main to building or structure
Plastic pipe cones in what types
Schedule 40 and 80
What is a gate valve
Either on or off
Globe valve
Can be throttled to control flow. Has arrow that points down stream
What is Check valve
Permits flow in one direction
prevents backflow
Pressure reducing valve
Reduces or increases pressure
What is a union
Dielectric “prevents corrosion of similar metals
What is cathodic protection
Impressed currents, rectified AC to DC
Graphite, iron, zinc
Separation of pipe distance
Parallel 5’
Crossing 12”
Can plastic pipes pass through fire rated walls
No
What shoukd pipes in mech rooms have
Sleeves
Blwhere are blow out toilets used
Health-care facilities
ADA stand for
American disabilities act
Another name for urinals
DFU
Drainage fixture unit
Most common type of urinal
Wash out type
Which type of urinal has removable cartridge
Waterless
Right-hand/left-hand regarding bathtubs means what
Drain as you face it
Left hand drain on left
When inspecting fixtures what’s one thing to look for
Fixtures should operate quietly
Sanitary system purpose
Removes domestic waste excluding raw / surface water
Transfers from source to treatment plant
Below ground sewer slope
1/4” per 1’
Baterboards spacing for below ground sewer
25’-50’
Rotary pumps are classified by what
4 types
The type of rotating element it has
Screw
Gear
Love
Veneal
Where are reciprocating pumps used
Used where precise amount of liquid is on other end required to be delivered and where delivery pressure is higher
3 types of reciprocating pumps
Piston
Plunger
Diaphragm
Most common sewage pump
Centrifugal
Plastic / PVC pipe weighs how much less than metal pipe
One half to one sixth the weight
What is a circuit in plumbing
Group of fixtures that connects back to main vent
Max amount of fixtures that can connect to a horizontal branch drain
8
What is the purpose of an interceptor
Installed in sanitary drain system to trap or intercept
Grease / sand
Air test is for how long
5psi for 15 mins
Auto fire detectors must conform to what
Applicable provisions of NFPA 72
Auto fire detector must be arranged how
To alert building occupants and transmit signal to constantly attended location
Must not rely on any other system
Must be stand alone
Ionization types of smoke detectors
Dual chamber design
Indicator lamp
Correct voltage / current
For Auto sprinklers you must check for what
Loose or bent deflectors or bent frames
Auto sprinklers solder must withstand what temp
50° above normal room temp
How much clearance must be under auto sprinklers
18”
What is the purpose of a refrigerated system
Process of removing heat from an area or substance
How does a condenser work
Removes and dissipates heat from compressed vapor to the surrounding air or water to condense refrigerant vapor to liquid
Three types of condensers
Air-cooled, water cooled, and evaporative
What does the auto expansion valve do
Maintains constant pressure in evaporator
What acts as a throttle on refrigerant and is a long tube with a small diameter and feeds to the evaporator
Capillary tube
Three ideal characteristics of refrigerant
Thermodynamic properties
safe
unreactive chemicals
What is air change load
How often and how long doors are open
Heat transmission load
Occurs through walls doors ceilings floor
What is used for pressure test
Dry nitrogen
True or false receivers can be in direct sun
False
Purpose of air conditioning system
Process of conditioning air in a space to maintain a predetermined temperature
What is included in self-contained air conditioning unit
Compressor condenser evaporator controls and casing
Three types of cooling towers
Natural draft
induced draft
force draft
Three types of compressors
Reciprocating
rotary
centrifugal - large refrigerators and air conditioning
Forms of heat energy
Fuel coal oil gas
What is sensible heat
Measured by thermometer or sensed or felt
What is latent heat
To change state of substance such as ice to water
What are the two types of air distribution
Trunk/branch duct
Individual duct
What are the classifications of low temp, hot water distro systems
1 pipe open -gravity system
2 pipe open - gravity system
1 pipe closed - forced circulation
2 pipe closed - forced circulation
Oil storage tanks must be _____ approved
UL
True or false all tests have to be recorded
True
True or false Hot water systems must be balanced
True
What is the purpose of air handling and distribution systems
Designed to distribute air in proper space by proper amount
Two types of fans
Axial Flow and radial flow
What is an axial flow fan
Has a propeller and air flows and direction the axle is pointing
What is a radial flow fan
Has a centrifugal flow air flows at right angles to axle
Ductwork materials
Sheet metal or other types of construction
Purpose of ductwork
Carries air to condition space
Two types of ductwork systems
High pressure or high velocity
low pressure or low velocity
Ductwork material thickness depends on what
Pressure length and cross-sectional area of duct
High temp systems such as kitchen exhaust uses what kind of material
Black steel
Partially saturated air uses what material
Aluminum
Completely saturated air uses what material
Copper
Purpose of dampers
Controls air flirt and distributes air throughout space
Types of dampers
Multiblade - shits off or limits air
butterfly - airflow control common in round ducts
split - splits air in 2 directions
How often are fire dampers inspected
Annually
Three types of fire ratings
A b and c
Four types of filters
Stranded throwaway
adhesive
carbon
electronic air cleaner
Pulleys and belts must be what
Aligned
Rust spots and ducks must be what
Cleaned and repainted
Power roof ventilators discharge error must be what
Not directed at intakes
Ductwork of 24 in or bigger has supports how often
Every 4 ft
How much air should be put into a building basic rule
4 ft³ per minute of fresh air per person
What test must be completed before insulating ducts
Airtight test
2-in drain test must be completed how often
Quarterly
The bottom of a water service pipe within 5 ft of a sewer shall be ______inches above highest the top of the highest point of sewer pipe
12”
This type of sewer connects two or more branches
Maine sewer
This pump is the most common and transport liquids by The conversion of rotational kinetic energy to the hydronamic energy of the fluid flow
Centrifugal pump
Circuit vents can have no more than how many fixtures connected to branchdrain
8
When inspecting photoelectric smoke detectors you must look for what
Source lamp or LED of specified voltage
Vent that extends above highest fixture branch and our principal artery of the vent system
Main vent
What test is used when the plumbing system is filled with water to check for tightness
Water test / hydrostatic test
Cooling tower with a top mounted fan which causes air to move up through the tower as warm water falls downward
Induced draft
