Oxyfuel Equipment Review Activity Flashcards
Acetylene is explosive in air concentrations of ______
anywhere between 2.5% to 80%
Acetylene under pressure greater than _______ is unstable.
15psi
A flame rich in acetylene is called __________
carbonizing flame
A fuel gas connector nut has _____ and is a left hand thread.
has a groove cut around it for identification
A regulator malfunction that occurs when the valve on the high-pressure side of the regulator does not seat properly is called _______
creep
A reverse flow check valves allows a gas to flow _______
in one direction only.
A screeching sound from the tip indicates _____
burnback
Backfire, burnbacks, and flashback; which is the most serious?
flashback
Bull nosed fittings are found on _____
oxygen regulators
cones being a paler blue indicate _____
oxidizing flame
Flashback arrestors can be installed _________
at either the torch end of the regulator end.
Flashback arrestors prevent ______
flames from the travelling in gases back from the torch handle to the regulator.
Hoses for fuel gas coloured ______
red
In acetylene gas pipeline systems or in splicing hose never use _________
copper tubing
Liquid detergents should not be used to check for leaks on a oxy-acetylene set up because they _________
petroleum-based product and has ammonia
_____ must always be considered a potential danger as it readily supports combustion and might react violently with some materials.
oxygen
Never _____ regulators or torch parts
oil
once the gas has passed through the master regulator in an acetylene manifold system the pressure in the open lines must not exceed _____
15 psi 103kpa
Oxygen cylinders are ___ drawn.
hot
Oxygen cylinder valves shout be ____ while in use.
opened fully
