Candidate Physical Ability Test (CPAT) Practice Test

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What component is equipped on tanks filled with liquefied petroleum gas to prevent reaching burst pressure?

A Safety valve
B Relief valve
C Pressure gauge
D Temperature sensor

The correct answer is: B Relief valve

The component that is specifically designed to prevent tanks filled with liquefied petroleum gas (LPG) from reaching burst pressure is a relief valve. This device is critical because it automatically opens to release excess pressure from the tank when it climbs above a predetermined threshold. This helps to ensure safety by preventing potential ruptures or explosions that could occur if pressure levels remain unchecked. A safety valve is similar in function but is typically designed for different applications, while pressure gauges are used to monitor the pressure within the tank, and temperature sensors measure the temperature but do not actively manage pressure levels. Therefore, the relief valve is the component that plays the essential role in maintaining safe operating pressures within LPG tanks.