Final answer:
Extra caution is needed when starting and stopping with a smooth bore tank due to the properties of gases and container design. Tanks have air gaps to prevent damage caused by compression.
Step-by-step explanation:
When starting and stopping with a smooth bore tank, extra caution is required because of the properties of gases and the design of the tank. Tightly constricting the expanding gas can lead to leakage or tank bursts due to resistance to compression. To prevent damage, tanks have air gaps that allow for expansion and contraction without stressing the container.