Acetylene
Acetylene is unstable above what pressure?
15PSI
True or false? Pressure in a cylinder will change with change of temperature.
True
A technique to minimize distortion in thinner materials from cutting is to use
Intermittent cutting
What safety device must be installed on an acetylene manifold system? Daily triple for 3 answers
Back flow check valve.
Hydraulic flashback arrester.
Pressure relief valve.
What is the purpose of a manifold system
Supply large volumes of gas
True or false? Acetylene cylinders should always be kept in the upright positions.
True
High pressure cylinders should be opened slowly to prevent
Damage to regulators
What can be done to help reduce hardening in high carbon steels?
PRE and POST heat
At what pressure does an acetylene working pressure gauge have a red warning mark?
15 PSI
Oxygen and MAPP
How far should an acetone valve be opened?
None, Acetone is what the acetylene is stabalized with.
Oxygen cylinder values have what type of construction?
Two piece
True or false? Having a dirty cutting tip will not affect cut quality.
False
What is the typical lifespan of a reverse flow check valve?
18 months
What are cylinders connected to manifolds with
Braided steel lines
What is the name of the safety valve on an acetylene cylinder?
Fuseable plug
âTâ type oxygen in cylinders are filled to how many kPa, or psi? Our bottle size.
2500-2600 PSI (18000KPA)
When a parts volume increases, it is due to _____ , and can cause distortion
Thermal Expansion
Zinc is used in what type of metal coating?
Galvanizing
What safety device must be installed on an acetylene manifold system?
Hydraulic Flashback arrestor
What is the draw limit for intermittent use of an acetylene cylinder?
1/10 cylinder capacity
What is the safety device on an oxygen cylinder?
Rupture disk
The correct travel speed produces this sound
A ripping sound
You do not want to draw acetone into the system because: Three answers for 500
It can damage the regulators
It will contaminate the flame
It can damage the hoses
What is the benefit to using a manifold system with two separate banks? 1 of three required for points
Ability to select which bank to draw from.
Can use one bank then switch to the other when empty.
No interruption to gas supply when switching cylinders.