The safety valve is set to automatically reduce pressure at:

150 psi.. Section 5.1: A safety relief valve protects the tank from too much pressure. It is usually set to open at 150 psi.

The safety valve is set to automatically reduce pressure at:

ANSWER BREAKDOWN
  • A. Incorrect. "50 psi." is not correct. A safety relief valve protects the tank from too much pressure. It is usually set to open at 150 psi.
  • B. Incorrect. "100 psi." is not correct. A safety relief valve protects the tank from too much pressure. It is usually set to open at 150 psi.
  • C. Incorrect. "125 psi." is not correct. A safety relief valve protects the tank from too much pressure. It is usually set to open at 150 psi.
  • D. Correct. A safety relief valve protects the tank from too much pressure. It is usually set to open at 150 psi.