Mechanics Final Exam 2023 Questions and Answers; consists of all possible questions and frequently tested quizzes (100% verified)

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Mechanics Final Exam 2023 Questions and Answers; consists of all possible questions and frequently tested quizzes (100% verified) ** An MOV burns out, you replace it but cannot read voltage or resi... stance. What should you do? ✔Ans✔ Replace it with a larger one (630) * On a Ward-Leonard circuit, the brake is set but the motor is trying to slip through the brake. What circuit is the issue? ✔Ans✔ Suicide circuit (425) ** A Hydro runs up with no load but does not run up with a full load. What is the issue? ✔Ans✔ The relief valve is set too low (805) ** Runby for a 1:1 car hits the CWT buffer 4" below the top landing. The CWT runby should be set at 18". How much should the ropes be shortened? ✔Ans✔ 22" for 1:1. For a 2:1 with the same issue is 44". ** You need to work on a freight door retiring cam. You LOTO the mainline disconnect but there is still power to the cam. What circuit is still hot? ✔Ans✔ Mainline disconnect (535) ** The contractor requests that the vertical center of the Rack and Pinion hoist be moved. How is this accomplished? ✔Ans✔ Adjust Tie downs/Wall ties (805) ** Working pressure on a Hydro is 400 PSI. What is the correct Relief Valve Setting? ✔Ans✔ 600 PSI Max. (805) 400 psi x 150% = 600 psi ** A contractor wants to raise the car speed from 100 FPM to 125 FPM. It currently has a 12" sheave. What size sheave is required? ✔Ans✔ 15" (125 /100 = 1.25 1.25 x 12 = 15) ** There is slight arcing at the Brushes and Commutator. What actions must be taken? ✔Ans✔ None. (430) "Heavy arcing is due to light brush pressure. Mechanical wear indicates heavy brush pressure. ** How much resistance is normally measured across a normally closed switch ? ✔Ans✔ 1.2 ohms or 1 to 2 ohms ** A car traveling in the hoistway always stops at the same point and blows a fuse. What is the problem? ✔Ans✔ Traveling cable has a cut or short [Show More]

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