A6 and C6 Flashcards
Troubleshooting GUIICV
Gather the information Understand the problem Identify how to evaluate the problem Identify the source of the problem Correct/repair/replace the component or wiring Verify the repair
half-splitting
identifying all the circuit components that are on the circuit and determine which component is closest to the halfway point
List the 4 senses that we use for troubleshooting
touch, smell, hearing, sight
most electrical circuit problems fall into
open cct
short cct
grounds
high resistances
Describe: Manila rope
light yellow colour
smooth
waxy surface
Describe: Sisal rope
almost white
coarse texture that is rough to the touch
weaker than manila rope
not acceptable for construction rigging and hoisting
Describe: Nylon rope
pure white, soft, pliable, and smooth
will stretch up to 40%
loses about 10% of its strength when wet
does not rot
Describe: Polyester rope
not elastic and will only stretch 5%
87% as strong as nylon
doesn’t lose any strength when wet
Polypropylene rope
poly rope, floats on water
60% as strong as nylon
best insulating properties against shock
list rope in order of strength
Nylon 100% Polyester 87% Polypropylene 60% Manila Sisal
Lifting Workers formula
WLL = RBS/10
General Material Lifting formula
WLL = RBS/DF
What does a thimble do
Protects the eye of the rope
Care and storage of rope
Keep clean dirt acts as an abrasive
Do not overload never more than 1/5 of BS
Avoid expose to direct sunlight
Do not freeze
sharp bends and knots reduce strength by .5
bight of a rope
the part that forms the loop
long portion of the rope
standing part
Describe: Bowline
forms a non-slip loop at the end of a rope
Describe: Round turn with two half hitches
to make a secure fastening
Describe: Clove hitch
secure a rope to a fixed object, such as a post
Describe: Timber hitch
to secure a rope to a plank, timber, post, tube or pipe to lift that object in a vertical position
Describe: Single Dutchman (trucker’s knot)
tying down a load
forms a slip resistant loop that acts like a pulley in a block and tackle system
Describe: Sheet bend
use the sheet bend to attach two ropes of unequal diameter to each other
Describe: Bridle hitch
used on loads that have suitable attachments points
one sling could safely support half of the load
Describe: Single basket hitch
must not be used on loads that could tilt and slide out of the hitch
Describe: Double basket hitch
used on loads that need support from underneath
the legs must angle more than 60 degrees
Describe: Double-wrap basket hitches
compresses all the components together
Describe: Single choker hitch
will not totally secure the top of loose loads
Describe: Double choker hitch
used on all horizontal loads made up of two or more pieces of material over 3m (10 ft.)
Describe: Double-wrap choker hitch
squeeze the load from all sides
Spreader bars
used to prevent that load from tipping or sliding
Equalizer bars
ensure that the load is distributed evenly between the legs of a sling
must be professionally designed
When to use a chain
when to high of temp for nylon sling
or too abrasive
Grade of chain used for lifting
system 8 (grade A) must be stamped on each link
Centre of gravity
must always be slung so that the centre of gravity is directly under the lifting device
