AG Mechanics CDE Practice Exam

Which of the following statements is NOT true concerning the oxyacetylene rig?

1. Acetylene hose is red in color.

2. Acetylene hose is orange in color.

3. Oxygen hose is green in color.

4. Oxygen operating pressure is set at 80 psi.

The correct answer is: Acetylene hose is orange in color.

The acetylene hose is typically red in color, not orange as stated in option B. This is because red represents the color of fire and is associated with the highly flammable gas, acetylene. Option A is true because the red color of the acetylene hose serves as a warning for its potential danger. Option C may seem like a possible answer since green is associated with oxygen tanks, but in reality, both the oxygen and acetylene hoses can be green in color. Therefore, option B is the only statement that is not true. Option D, on the other hand, is true because the oxygen operating pressure is commonly set at 80 psi for a standard oxyacetylene rig.