Mechanics Exam Review – NEIEP | 100% Correct Answers | Verified | Latest 2024 Version

A contractor wants to raise the car speed from 100 fpm to 125 fpm, it currently has a 12" sheave. What is required? - 100 fpm/125 fpm= 12"/ X =15 A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - Replace it with a larger MOV - 630 On a Ward-Leonard circuit the brake is set, but the motor is trying to slip through the brake. What is the issue? - Suicide Circuit - 425 You have an old DC motor and are adding an SCR drive, what do you do to the interpoles? - Leave the interpoles alone. When adding a SCR drive to the generator, the series loop is removed, as are the 3 resistors. Everything else remains the same A hydro runs up with no load but will not run with a full load. What is the issue? - The relief valve is set too low - 815 Runby for a 1:1 hits the CWT buffer 4" below the top landing. CWT runby should be set at 18". How much should the ropes be shortened? - 22" - 235 You need to work on a freight door retiring cam, you LOTO the main line but there is still power on the cam. What circuit is still hot? - Door Operator disconnect -535 The contractor requests that the vertical center of a Rack and Pinion hoist be moved. How do you do this? - Adjust tie downs and wall ties - 850 Working pressure on a Hydro is 400 PSI. What is the maximum relief valve setting? - 400 x 150%= 600 PSI - 815 What must be installed on a false care before operation? - Spring Loaded safeties - 110There is slight arcing between the brush and commutator. What action must be taken? - None Note: Heavy arcing= light brush pressure, Heavy brush pressure= mechanical wear If rigging is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What is the beam capacity? - 18,000lbs -210 How much resistance is measured over a normally closed switch? - .2 Ohms- should be zero but will never be that low A car traveling in the hoistway always stops at the same spot and blow