What is the proper position for the dryer sprinkler water supply valve?

The proper position for the dryer sprinkler water supply valve being in the open position is crucial for ensuring the effective functioning of fire suppression systems in commercial dryer applications. When the sprinkler system is equipped to combat potential fires, having the water supply valve open allows for the immediate flow of water in the event of a fire. This swift response is vital in controlling and extinguishing fires before they escalate, thereby protecting both property and personnel.

In many settings, particularly those involving dryers and other heat-producing equipment, the consistent availability of water through the sprinkler system helps meet safety regulations and ensures compliance with fire codes. Maintaining the valve in the open position is an essential practice for safety measures in maintenance operations.

Additionally, other options like being in a closed, locked, or neutral position could impede the operation of the sprinkler system, which can result in devastating consequences if a fire were to occur. Hence, the open position is the correct and necessary choice for the sprinkler water supply valve.