Job Hazard Analysis

A: An inlet blockage would raise noise and cavitation indicators early without a smooth cycle-to-cycle time trend. A PLC ramp change would alter the profile abruptly and not explain the steady current increase. Aeration would show pressure ripple and temperature spikes rather than a monotonic spin-up delay. A preload error increases friction predictably with each thermal cycle, stretching start time while nudging current upward.

A: Pitting needs free chlorides and time and wouldn't lock threads on the first few cycles. Hydrogen embrittlement doesn't manifest as smooth seizure in austenitic grades. Stress corrosion cracking requires tensile stress and a specific corrosive environment, not rapid assembly reuse. Adhesive wear explains the progressive seizing under repeated sliding contact even with grease.

A: Revision control alone doesn't reveal mismatches between paper and hardware that create new hazards. Training records don't expose pinch points or access changes on the shop floor. Lockout tagout is a control, not the reason for the inspection itself. A walkdown catches as-built deviations that alter energy paths and defeat prior hazard assumptions.

A: Using gauge pressure underestimates energy and ignores atmospheric contribution. Adiabatic work overstates the hazard for slow venting scenarios used in JHA. Dropping the logarithmic term breaks the thermodynamic relation entirely. Applying absolute pressures in the isothermal equation gives the correct order of magnitude for credible release energy.