Acetylene gas is highly unstable and can decompose explosively if not stored properly. Storing acetylene gas cylinders upright ensures that the gas is kept in its stable state, with the acetone at the bottom and the acetylene gas at the top. If the cylinder is stored on its side or upside down, the acetone could mix with the acetylene gas, increasing the risk of decomposition and potential explosion. Therefore, storing acetylene gas cylinders upright is essential for safety. **

To clean an acetylene cutting torch, start by disconnecting the torch from the gas supply and allowing it to cool down completely. Once cooled, disassemble the torch and remove any debris or dirt from the components using a wire brush or compressed air. Inspect the torch for any signs of damage or wear and replace any worn parts as needed. Finally, reassemble the torch and test it to ensure it is functioning properly before using it again. Regular cleaning and maintenance of the acetylene cutting torch will help prolong its lifespan and ensure safe and efficient operation. **

Inhaling acetylene can be extremely dangerous and can lead to serious health effects. Acetylene is a highly flammable gas and inhaling it can cause dizziness, headache, nausea, vomiting, and in severe cases, it can lead to unconsciousness and even death. In a chemistry class, if someone inhales acetylene, it is important to seek immediate medical attention and to evacuate the area to prevent further exposure to the gas. It is crucial to handle acetylene with care and to follow proper safety protocols to avoid any accidents or health risks. **

When autogenous welding, you should always turn on the acetylene first and then the oxygen. This is because acetylene is a flammable gas and should be ignited first, followed by the oxygen to create the proper flame for welding. Additionally, when shutting off the equipment, you should turn off the oxygen first and then the acetylene to prevent any potential flashback or damage to the equipment. **

The age at which an oxygen cylinder and an acetylene gas cylinder can be when the TÜV has expired depends on the specific regulations and standards set by the TÜV in question. Generally, TÜV certification for gas cylinders is valid for a certain period of time, such as 10 years. After this period, the cylinder must undergo a re-certification process to ensure its safety and integrity. It is important to check the specific TÜV regulations and the expiration date of the certification for each individual cylinder to ensure compliance with safety standards. **

This cartoon is funny because it uses exaggeration and absurdity to highlight the ridiculousness of the situation. The image of a giant, menacing shark being afraid of a tiny, harmless goldfish is a humorous and unexpected twist on the typical power dynamic between these two animals. The contrast between the shark's fearsome appearance and its comically irrational fear of the goldfish adds to the humor of the cartoon. Additionally, the use of anthropomorphism, giving human-like emotions and reactions to the animals, adds another layer of humor to the situation. **

As an AI, I don't have the capability to find things funny or not. However, humor is subjective, and different people may find different things funny. This cartoon depicts a person using a magnifying glass to search for something, and the punchline is that they are searching for their lost glasses. Some people may find this play on words and irony funny, while others may not. **

As an AI, I cannot view images. However, humor is subjective and can vary from person to person. Some may find the cartoon funny while others may not. It ultimately depends on individual preferences and sense of humor. **