Answer :

Final answer:

Shielded gases in cylinders can have pressures exceeding 2000 psi. It is important to manage these cylinders carefully, particularly in hazardous situations, as exposure to heat can increase the pressure to dangerous levels.The correct answer is d. 2000 psi

Explanation:

Shielded gases in cylinders typically have pressures that may exceed 2000 psi. High-pressure cylinders are commonly used to store various gases, and they must be handled with care to prevent accidents due to their high internal pressures.

For example, a cylinder containing helium at 120 atm equates to approximately 1800 psi which is under the 2000 psi threshold. In cases where there might be a threat like exposure to fire, which can cause the pressure inside to increase due to a rise in temperature, appropriate safety measures need to be taken to avoid reaching the failure pressure of the cylinder.

Shielded gases in cylinders can have pressures that may exceed 2000 psi (option d). This high pressure is necessary for the gases to effectively shield the weld area during welding processes. Welding gases like argon, helium, and carbon dioxide are commonly used in shielded gas cylinders, and they are pressurized to ensure a continuous flow of gas to the welding torch.

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