What is a lifting accessory ?
Eyebolts
Shackles
Overhead travelling crane
Fibre rope sling
Manufacturers must verify equipment is safe to be used before putting it onto the market.
True
False
An interim inspection is done by the end user.
True
False
Three levels of inspection
Pre use inspection
Interim inspection
Thorough examination
First parade
Correct equation to work out velocity ration.
Distance moved by effort ➗Distance moved by load
Distance moved by load ➗Distance moved by effort
Force ✖️Distance
Load➗Effort
Turning moment ?
Foce✖️ Distance
Load➗Effort
MA➗VR✖️100
Force➖Distance
If the load is 50kg and the effort required to list 5kg, what is the mechanical advantage?
10
0.5
500
1
Mechanical advantage is 6, velocity ration 25. What is the efficiency?
41.6%
150%
24%
88%
When we apply a force of 10N on the spanner at a distance of 0.2m from the center of the bolt, the turning moment is?
2NM
20NM
5NM
50Nm
Why do we do heat treatment ? (4 correct)
Damage the equipment
Increase the strength
Relieve stress
Toughten the material
Soften the material
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