3. Name one method of attaching connections to hoses so that they will not blow off or pull off when pressure is applied.
4. How could either an oxygen or acetylene hose that had been burned or otherwise injured, be repaired to withstand the gas pressure?
5. How could regulator be operated if the cross-bar for applying pressure upon the diaphragm springs were lost?
6. (a) What procedure would be necessary to make connection if cylinder were supplied with an adaptor which would not fit the regulator connection and it could not be coupled up directly?
(b) Realizing that all cylinder connections about a regulator are generally supplied with a ¹⁄₄-inch taper pipe thread, why do all manufacturers solder them in?
7. Explain why oxygen high-pressure gauges are constructed with a loose back and a solid front.
8. (a) Where is the first place to seek trouble in a gauge if it leaks?
(b) Can such leaks be repaired?
(c) Describe method.
9. If either a high-or low-pressure gauge were injured beyond the repair state how could welding plant be kept in operation without it?