問題一覧
1
The ‘design factor’ when used for wire rope slings is:
ratio of nominal strength to total working load of rope
2
Mousing is:
closing the open hook(hook without a safety latch) with annealed wire
3
A tagline is used to:
guide the load and prevent its rotation
4
The length of A rope lay is:
The distance along the axis of a rope for one strand to complete a circle of the rope
5
To Reece is to:
Pass a rope through a hole or around the system of sheaves
6
A wire rope used in hoisting has broken wires randomly distributed through the strands. What is the maximum allowable number of broken wires per rope lay
6
7
A half inch fiber, core wire rope is fastened to the hitch point by knotting, the best knot to use is:
no wire rope shall not be fastened by knotting
8
What type of knot is required to secure a Manila rope to a hook?
catspaw
9
A wire rope sling has had the marking obliterated. Before using, the technician shall:
not use the sling
10
The following drawing depicts a load on two new slings the rated load is 10,000 pounds. The rating capacity of each sling is 5000 pounds. which of the arrangements will exceed the sling load limits.
B & C
11
When using a wire rope sling the D/D ratio is:
The ratio of the diameter of of the object that the wire rope is around to the diameter of the wire rope
12
When using a ‘choker hitch’ the sling is:
wrapped around the load like a noose
13
The following sling is:
6.7 units long
14
Why are rope slings are made from:
Bright improved plow, steel or extra improved plow, steel or extra extra improved plow steel
15
The initials ‘IWRC’ when describing a wire rope sling stand for:
independent wire rope core
16
I which of the following markings is not required on a metal mesh fabric sling:
Rated load for the type of hitch regardless of the angle
17
The person using a metal mesh sling must inspect it:
each day it is used
18
How many broken wires and metal mesh sling requires that it be removed from service?
1
19
When chain hoist are used, they must be inspected:
before each use
20
Repairs to chain hoists can only be made by:
Authorized representative of the chain hoist manufacturer
21
If a rope sling is wrapped around a small diameter the D/D ratio will be low (less than 24) and the rated capacity of the sling will be
Reduced by 50% or more depending on the D/D ratio
22
The ‘proof test’ of a sling is:
A test to prove the manufacture of the sling
23
Shackles are used to:
connect the load to the sling or lift line
24
When ‘eyebolts’ are used for connecting to a load the sling shall pull:
Vertical directly that there is not a bending force on the bolt
25
Natural and synthetic fiber ropes are allowed to be used for:
Lashing, tackle, tagline, straps and light loads
26
Of the two types of natural fibers used in ropes (sisal and Manila):
sisal is weaker and whitish in color while Manila is light yellow or cream color
27
If a hook has a damaged, broken or missing:
It can be used temporarily if the open end is moused after the load is attached