問題一覧
1
What is the maximum elongation that a roller chain can tolerate before it should be replaced?
3%
2
What causes roller fatigue?
Lack of lubrication
3
What problems will chain misalignment cause?
Sprocket wear
4
What are the two most important factors in the life of a silent chain drive?
Tension and alignment
5
What type of machine guard limits the operator’s access to the danger zone?
A barrier guard
6
What type of machine guard prevents access to the danger zone altogether?
An enclosure guard
7
Name the two main groups of mechanical couplings:
Rigid and flexible
8
Large fans are typically powered in what way?
Motor and belts
9
Which type of of conductivity cells are usually equipped with a safety chain to prevent the cell from blowing out?
Insertion
10
Chain-linked fences should be topped with:
Barbed wire
11
What are the two links that make up a standard roller chain?
Roller, pin
12
On a roller chain with a designation of 35, what do the 3 and the 5 designate?
3 is the size in eights of an inch; 5 means a roller less chain
13
What is the maximum elongation that a roller chain can tolerate before it should be replaced?
3%
14
What causes roller fatigue?
All of the choices
15
What problems will chain misalignment cause?
All the choices
16
What are the two most important factors in the life of a silent chain drive?
Lubrication and alignment
17
Name the two main groups of mechanical couplings
Rigid and flexible
18
What type of machine guard limits the operator’s access to the danger zone?
A barrier guard
19
What type of machine guard prevents access to the danger zone altogether?
An enclosure guard
20
What is attention or slack a roller chain is recommended to have?
2% slack between centers