tools, safety, dwv Flashcards
a water jet machine can provide up to _____ psi of working pressure
3500
a right angle drill has a _____” check size
1/2
a _____ is the preferred tool to use when tightening water supply connections to the faucet behind fixtures
basin wrench
the maximum tube size for which electric soldering torches can be used is
3”
a ____ wrench would be preferred when assembling a 1/2” to 3 “ pipe inside a small wall cavity
offset pipe wrench
a ____ is used to measure the amount of current in an electrical circuit
ammeter
the lower section of an extension ladder is called a ______
bed section
when flaring copper tube with an impact flaring tool, the collar must be ____ the tube end in order to make a proper flare
flush to
_____is packed into the cast iron hub before the lead is applied
oakum
when pouring a cast iron joint, the layer of lead should be _____
1” thick
a _____ wrench should be used to assemble, without marring, pipe with finished chrome plating.
strap
a ____ is a tool used to cut external threads on pipe
die
a ____ is a tool that is used to make victaulic joints
pipe groover
soldering is performed with temperatures less than _____ degrees
840
tubing benders are used on _____ copper tubing
annealed
expanding tools and crimping tools are used on
pex
a _____ drill is used to drill holes in concrete
hammer
a ____ is used on concrete
masonry bit
before an operator can behind to use a powder actuated tool, the operator must____
have passed the exam on the safe operation of the tool
______ is the most dengerous common gas becaquse it gives no warning to its victims and is slightly lighter than air
carbon monoxide
a ____ is a test instrument used to measure the pressure of gases and vapors in a closed system
manometer
the main advantage can of using a clamp on ammeter is _____
measurements can be taken without opening the circuit
plumbers use liquid _____ to freeze pipes
nitrogen
right angle drills can cut holes up to _____”
4-5/8”
a _____ is a circular saw that is attached to a small table and pivots at its rear
chop saw
an injured individual experiences shock when_____
injury is severe and the body vital functions are threatened by a lack of blood or when the major organs and tissues do not receive enough oxygen
self contained breathing apparetus must be inspected ____
monthly
_____ is not recommended for safely operating power equipment
ensuring the power switch is in the ON position before connecting equipment to a source
a class A fire extinguisher is identified by ____
the color green inside the triangle symbol
the angle of repose varies on a job site when
types of soil change
granular soil is ___
soil consisting of gravel , sand , or silts with little or no clay content
a ____ is a vertical steel H beam that is driven into the ground and designed to hold wood lagging
soldier pile
confined spaces do not include ____
trenches less than 4’ in depth
section _____ of an SDS contains information about proper handling and storage of a material
7
____ is not advised if a fuel gas cylinder is found leaking around the valve stem
keeping the cylinder in the working area
what is required on a confined space entry permit
names of employees, air sampling instruments, life saving equipment,
an extension cord with a capacity of ___ Amps is suitable for most power tools
15
the most common type of electrical shock hazard is a ____
ground fault
a sanitary waste system should not be used for waste ____
from storm water drains
respiratory protection is required to protect against ____
airborne chemical hazards
a class ____ fire extinguisher should be used on an electrical fire
c
graywater system is an onsite water treatment and recycling system that uses wastewater generated from?
washing machines, showers, bathtubs, and sinks
graywater can be used in _____
water closets, urinals, trap seal primers, and directly connected underground irrigation systems
on a sewage pump, the float level for the high water alarm should be set ___ above the highest level for pump activation depending on the depth of the sump pump
6 - 12”
a pipe repair clamp can be used to repair a pipe that ____
has a pinhole
a transition coupling is used for ____
forming a leak proof joint between two sections of drain piping
a ____ valve is used to prevent the backflow of sewage into a building
backwater
a ____ cutter head is recommended when sand is present in the lines
space
when no cleanout is present and rodding from a waste arm underneath a sink is the best access a ____ drain cutting head is best suited for this application
drop head auger
care must be used when water jetting a ____ pipe
poly vinyl chloride
an _____ valve does not require any power and is less prone to being blocked by debris than any other backwater valve
automatic knife valve (backwater)
a ____ cannot be used to supply a gray water system
water closet
_____ is the process of attaching two ends of plastic pipe together using heat and pressure
butt fusion
a _____ is a water tight pit or receptacle into which liquid or liquid carried waste is drained
sump
the method of drain cleaning that uses high pressure water directed through hardened steel or a brass nozzle to open and clean drain lines is called ____
water jetting
_____ is a condition that occurs when a pump attempts to compress air trapped in the discharge pipe and does not move any water
air lock
a _____ pump is used to pump graywater or other non organic liquids from sinks and washing machines into building drains
laundry
a ____ is an extension from the building storm drain to a public storm sewer or other point of disposal such as a retention or detention pond
building storm sewer
the ____ system is the portion of a plumbing installation designed to maintain atmospheric pressure within the installation
venting
a ____ is a pipe fitting with a removable plate or plug that provides access to the plumbing or other drainage pipes for inspection and removal of materials
cleanout
what types of testes and be used to determine leaks in the venting system
water
air
smoke
______ are air pressure activated, one way mechanical vents that are used to replace conventional pipe venting
air admittance valves (AAV)
a ____ valve is a plumbing valve that permits fluid flow in only one direction and closes automatically to prevent backflow
check valve
sump pump and sewage ejectors should be thoroughly inspected
annually
a _____ is a device that rests on the surface of a liquid and actuates a valve or switch in a plumbing system
float switch
