How can a pilot check the voltage on the battery of the T-54A?

The correct method for a pilot to check the voltage on the battery of the T-54A is to press the voltage buttons on the generator loadmeters with both generators off. This procedure allows the pilot to directly view the battery voltage displayed on the loadmeters, which are designed for monitoring various electrical parameters, including battery voltage, within the aircraft's systems.

This approach is efficient as it utilizes the existing instruments in the cockpit, providing real-time feedback about the battery's status. By ensuring that both generators are off before performing the check, the pilot can isolate the battery's voltage level without interference from the generators that could affect the reading.

Other methods, such as using an onboard voltmeter or consulting the aircraft manual, may not provide immediate access to the battery's current voltage status or may not be designed specifically for operational monitoring during flight. Although using a multimeter externally is a valid method for checking voltage in general, it is not a practical or typical procedure for a pilot operating the aircraft and involves more steps than necessary.