Local 483 Apprenticeship Practice Exam

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What must exist at each sprinkler head to ensure proper operation?

An acceptable flow rate (gallons per minute) and pressure (pounds per square inch)

A separate water storage tank at the head

The key idea is that each sprinkler head must have a dependable, pressurized water supply with enough flow to meet its design needs. When a head is activated by heat, it must receive the right volume of water per minute at the required pressure to deliver effective fire control. If pressure or flow is lacking at any head, it may not discharge properly or fully.

Having a separate water storage tank at every head isn’t how typical sprinkler systems are configured; the system relies on a shared water supply that feeds the network of heads. A manual release handle at the head isn’t part of automatic operation, and a backflow prevention device is placed on the main supply line to protect the water source, not at each individual head. So the essential requirement is maintaining adequate flow and pressure at each sprinkler head.

A manual water release handle at the head

A backflow prevention device at the head