AG Mechanics CDE Practice Exam

Acetylene is dangerous because it is

1. Compressed

2. Explosive

3. Flammable

4. All of the above

The correct answer is: All of the above

Acetylene is a highly flammable gas, thus it is dangerous because it can easily ignite and cause fires or explosions. This is why it is important to handle it with extreme caution to avoid accidents. Options A and C are incorrect because while they do describe aspects of acetylene, they do not fully encompass all of its potential dangers. Option B is also incorrect because although acetylene is explosive, it is not the only reason why it is dangerous. Therefore, option D is the most accurate answer as it includes all of the above-mentioned factors.