The safety valve discharges air at:

150 psi.. Section 5.1: Safety valve opens at 150 psi to prevent tank explosion.

The safety valve discharges air at:

ANSWER BREAKDOWN
  • A. Correct. Safety valve opens at 150 psi to prevent tank explosion.
  • B. Incorrect. "100 psi." is not correct. Safety valve opens at 150 psi to prevent tank explosion.
  • C. Incorrect. "125 psi." is not correct. Safety valve opens at 150 psi to prevent tank explosion.
  • D. Incorrect. "60 psi." is not correct. Safety valve opens at 150 psi to prevent tank explosion.