MWA- A Flashcards
At what decibels is hearing protection required
85 dC
What is the ratio for when setting up a ladder
4:1
How tall are the toe boards on a scaffold
100mm or 4”
What is the maximum clearance between the scaffolding platform and toe board
1/2” or 13mm
at what height are guardrails on a scaffold required
10ft or 3m
How long are hard hats certified for
5 years
How often do you have to change the lining of your hard hat
anually
What does it mean to lockout an equipment
when the equipment must not be used except by authorized personnel
What is fall arrest
a system that will stop the workers fall before the worker hits the surface below
What are examples of a fall protection system
guardrails, full body harness w/ an anchor, control zones
At what height is fall protection required
3m or 10ft
who must ensure that a fall protection system is used
the employer
what is the maximum free fall limit for a personal fall arrest system without a shock absorber
1.2m or 4ft
are combination locks allowed to be used for lockout
no
what is a enclosed or partially closed space, that is no intended for continuous human occupancy
a confined space
who can maintain broken equipment
certified maintenance
who can remove a lockout
the person who locked out the tool or supervisor, and follow company procedures
what tool is used to tighten a flat edged fitting
a spud wrench
what does a flashback arrestor do on an oxy-acetylene tank
flame traveling into the flame
when using a hacksaw how many teeth should be in contact with the work piece
3
What are class A fire extinguishers used on
fires involving ordinary combustible materials : wood,paper, textitles
what is the safety device on a acetylene cylinder
a fusible link
There is a fire that engulfs live electrical equipment, what class fire extinguisher must be used
class C
What are class B fire extinguishers used on
combustible vapours such as gasoline
what are class D fire extinguishers used on
fires of high intensity that may occur with certain combustible metals such as titanium, magnesium, zirconium, sodium and potassium
What are in class c fire extinguishers
co2 or dry chemicals
what are acetylene tanks always filled with
acetone
how is a pipe wrench measured
the inside of the hook jaw to the end of the handle with the jaw completely open
on a soil pipe cutter what part cuts the cast iron
the rollers(wheels) on the chain
if black iron pipe is to be install in a small place and you cannot use regular pipe wrenches what must you use
a chain wrench
at what current can fatal injury occur
50amps
how far should you work away from powerlines
3m or 10’ depending on local, provincial, state and federal laws
what is the minimum amount and size of the planks used for toeboards on scaffolding
2 planks @ 2” x 10”
how high must the guard rails be place
42” above the working platform
if trench walls are required to be sloped what is the ratio
3:4, 3 down 4 over
what is a tag line
used to help stabilize the load usually made of fiber
what is a common tag line
a bowline
what does wll stand for and mean in relation to rigging
Working load limit, the maximum allowable load a rigging equipment can safely lift
what must be done before strapping and lifting an object
inspect the straps
What type of drawing shows gridlines and exact locations of appliances
Architect drawing
what are mechanical drawings
shows the layout and piping and equipment of mechanical systems
if a waterline and drainage pipe are placed in the same trench, what is the configuration and why
the waterline is always above and the drainage on the side, for cross-connection purposes
what is the difference between an detail drawing symbol and elevation symbol
the elevation symbol has a an arrow
who can perform maintenance on a non-functional powder actuated tool
the manufacturer or a certified maintenance
when are double line drawings used
when accurate scale and more realistic appearance is required
what does it mean when there is an x or o on the single line drawing of a pipe
it is butt welded
what is the most important drawing for a plumber
the floor plan
what do sectional drawings give you
information about wall construction and exterior and interior wall finish
what drawing shows the structure of the building, including openings for doors and windows
floor drawings
