Interactive Maintenance Study Lab, Formula Calculators & Flashcards

Master essential electrical, mechanical, hydraulic, and safety formulas tested on Ramsay Maintenance Assessments and the USPS Postal Exam 955.

Key Industrial Maintenance Formulas

• Synchronous Motor Speed: Ns = (120 × f) / p
• 3-Phase AC Real Power: P = √3 × V_LL × I_L × PF
• Hydraulic Cylinder Force: F = P × A = P × (π × d² / 4)
• Shaft Torque from Horsepower: T = (5,252 × HP) / RPM
• Centrifugal Pump Affinity Laws: Q ∝ N, H ∝ N², P ∝ N³