| They have little braking power | |
| Usually require a fifth wheel converter | |
| All of these are true | |
| Often do not have spring brakes |
| The minimum air pressure for the air storage tanks | |
| The average air pressure maintained in the air storage tanks | |
| The level at which the air compressor will start pumping air into the air storage tanks | |
| The level at which the air compressor will stop pumping air into the air storage tanks |
| Grenades | |
| Oxygen | |
| Emergency medical supplies | |
| Propane |