Brodie valves automatically close when the tank is ______ percent full or sooner.

Brodie valves automatically close when the tank is ______ percent full or sooner.

• A. 90 percent
• B. 95 percent
• C. 97 percent
• D. 99 percent

Answer: (B)

Brodie valves act as overfill protection in bulk oil storage, automatically shutting the tank fill when the liquid reaches a preset point. The typical setpoint is about 95% full, which gives a safe margin for thermal expansion, measurement variances, and filling surges while still using as much capacity as practical. If the setpoint were much lower, you’d lose more usable storage; if it were much higher, you’d risk spills during temperature changes or unexpected increases in volume. So 95% full (or sooner if conditions trigger the mechanism) is the standard, safe choice.

Brodie valves act as overfill protection in bulk oil storage, automatically shutting the tank fill when the liquid reaches a preset point. The typical setpoint is about 95% full, which gives a safe margin for thermal expansion, measurement variances, and filling surges while still using as much capacity as practical. If the setpoint were much lower, you’d lose more usable storage; if it were much higher, you’d risk spills during temperature changes or unexpected increases in volume. So 95% full (or sooner if conditions trigger the mechanism) is the standard, safe choice.