Final answer:
Gauge pressure is the pressure measured relative to atmospheric pressure. The 'BLEED AIR MANIFOLD PRESSURE GAGE' refers to a pressure gauge used to measure the pressure of bleed air in an aircraft's manifold system. The phrase '___ PSI - MAXIMUM' indicates the maximum pressure that the gauge can measure.
Step-by-step explanation:
Gauge pressure is the pressure measured relative to atmospheric pressure. It is positive for pressures above atmospheric pressure and negative for pressures below it. In the context of the question, the term 'BLEED AIR MANIFOLD PRESSURE GAGE' refers to a pressure gauge used to measure the pressure of bleed air in an aircraft's manifold system. The '___ PSI - MAXIMUM' indicates the maximum pressure that the gauge can measure.