Engine 2014: General Subjects

1. A Open the oxygen valve wide open and the acetylene valve slightly to light-off.
2. B Open the acetylene valve very slightly and the oxygen valve the same amount to light-off.
3. C Open the oxygen valve very slightly to light-off and then open and adjust the acetylene valve.
4. D Open the acetylene valve very slightly to light-off and then open and adjust the oxygen valve.

Tip: press A-D to answer