Mechanic Exam| 123 Questions| With Complete Solutions

E=__ correct answer: IR P=__ correct answer: IE Pie r^2 = correct answer: Area of a circle 231 in^3 /____ correct answer: gal. 25.4mm/__ correct answer: in. 2.2kg/ correct answer: lb 3 phase rectifier output = correct answer: 1.33 x input single phase output = correct answer: 0.9 x input RMS (effective voltage) = correct answer: 0.707 (PEAK V) TC = correct answer: R x C (5)??? RPM = correct answer: 60 (frequency) / (poles/2) door overlap minimum = correct answer: 5/8" min door gaps maximum = correct answer: 3/8" max Gibs minimum = correct answer: 1/4" min Gate Switch maximum = correct answer: 2" Passenger Sill to Sill ____ to ______" correct answer: 1/2 to 1-1/2" Platform Lift Sill ____ to _____" correct answer: 3/8" to 3/4" Moving Walk maximum = correct answer: 12 degree max Governors (Car Trip Speed =______ & Overspeed Switch =______) correct answer: Car trip speed 15-20% greater than contract speed. Overspeed Switch less than or equal to 90-95% of trip speed CWT (____%) correct answer: Up to 10% greater than car trip speed 1) A contractor wants to raise the car speed from 100FPM to 125FPM. It currently has a 12" sheave. What size sheave is required? correct answer: 15" ----Diam = 12, 12"/4=3, 25FPM=3in : 100FPM + 25FPM = 12"+3" =15" 2) An MOV (metal oxide varistor) burns out. You should replace it, but cannot read the Voltage or resistance. What should you do? correct answer: Replace it with a larger MOV. (630)