What three actions are performed prior to running a PSOT?

What three actions are performed prior to running a PSOT?

• A. Install Gun Safeties; Install Clearing Sector Holdback Tool; Mode Sequence LPWS To Standby Maintenance
• B. Install Gun Safeties; Calibrate Sensors; Load Bank
• C. Prime The Fuel System; Preheat The Engine; Lubricate Bearings
• D. Inspect Exhaust; Check Filter; Verify Seals

Answer: (A)

The main idea here is ensuring safety and proper system readiness before a PSOT. Engaging gun safeties prevents any accidental discharge during the test. Installing the clearing sector holdback tool stops unintended movement of components, reducing injury and equipment risk. Setting the LPWS mode sequence to standby maintenance puts the system into a controlled, non-operational state that signals maintenance is in progress and keeps the test from running under normal operation conditions. Together, these actions create a safe, stable environment and clearly designate that the system is in a protected state before the PSOT begins. The other options describe steps that are not specifically about putting the system into a safe, maintenance-ready PSOT state. Calibrating sensors and loading a bank relate to measurement or energy testing, not safety and mode transition. Priming the fuel system, preheating the engine, and lubricating bearings are typical startup preparations for a powered unit, not pre-PSOT safety isolation. Inspecting exhaust, checking filters, and verifying seals are general maintenance checks, not the targeted pre-run safety setup required for a PSOT.

The main idea here is ensuring safety and proper system readiness before a PSOT. Engaging gun safeties prevents any accidental discharge during the test. Installing the clearing sector holdback tool stops unintended movement of components, reducing injury and equipment risk. Setting the LPWS mode sequence to standby maintenance puts the system into a controlled, non-operational state that signals maintenance is in progress and keeps the test from running under normal operation conditions. Together, these actions create a safe, stable environment and clearly designate that the system is in a protected state before the PSOT begins.

The other options describe steps that are not specifically about putting the system into a safe, maintenance-ready PSOT state. Calibrating sensors and loading a bank relate to measurement or energy testing, not safety and mode transition. Priming the fuel system, preheating the engine, and lubricating bearings are typical startup preparations for a powered unit, not pre-PSOT safety isolation. Inspecting exhaust, checking filters, and verifying seals are general maintenance checks, not the targeted pre-run safety setup required for a PSOT.