| What is the function of the bypass valve on the self-contained breathing apparatus? |
| A) The valve reduces the high pressure in the bottle to about 3 psi above atmospheric pressure. |
| B) When pressure in the apparatus exceeds 7 psi above atmospheric pressure, the valve opens to release pressure. |
| C) In the event of a malfunction in the equipment, the valve can be operated manually to give the wearer air. |
| D) The valve opens in excessive heat to release the oxygen in the bottle and prevent the bottle from exploding. |
