Final answer:
In an aircraft, if both generators are inoperative, the hydraulic pressure indicator can still be operational with a good battery.
Step-by-step explanation:
In an aircraft, the hydraulic pressure indicator is powered by the aircraft's generators. When both generators are inoperative, the hydraulic pressure indicator will not receive power and will be inoperative. However, if the aircraft has a good battery, the hydraulic pressure indicator can still be operational.
This is because the battery provides electrical power to critical systems, such as emergency lighting and essential instruments, when the generators are not working. The hydraulic pressure indicator is considered an essential instrument and would receive power from the battery.
Therefore, the statement 'With both generators inoperative and a good battery your hydraulic pressure indicator will be inoperative' is False.