Final answer:
If two or more gas outlets are present in a research laboratory space, individual shut-off valves are required. These valves allow researchers to control the flow of gas to specific outlets, ensuring safety and convenience.
Step-by-step explanation:
If two or more gas outlets are present in a research laboratory space, it is required to have individual shut-off valves. This is because each gas outlet should have its own shut-off valve that can be used to control the flow of gas to that specific outlet.
Having individual shut-off valves is important for safety and convenience. It allows researchers to easily control the supply of gas to specific areas, and in case of an emergency or maintenance, they can shut off the gas flow to a particular outlet without affecting others. This helps to prevent gas leaks and ensures the overall safety of the research laboratory.