Mechanical Engineering > QUESTIONS & ANSWERS > Elevator Mechanic Exam Latest 2023 Already Passed (All)
Elevator Mechanic Exam Latest 2023 Already Passed Which relay do you need to Order 710 Pg, 7 ✔✔A Latching relay: Used for call registration,direction selection or as selector relays Two types ... are: Set/Rest are electrical and Mechanical Latching relays Need to know latching relay symbol, Its a box with shaded triangle in lower right hand corner. Know the formula for RPM 435 Pg. 5 ✔✔RPM = 60 ∙ ƒ ÷ P÷2 = Step 1. 60 x Frequency (Hz.) = Step 2. Poles ÷ 2 = Take answer 1 and ÷ by answer 2 = Know what a Megger is and what it does 636 Pg. 13 ✔✔If you are referring to a megohm meter, it is a test of the insulation properties of such things as electric wiring, motor windings and high power antenna mounts. We use a "megger" or "meg out" electrical wiring and equipment to see if it is shorted to ground or the frame in any way. The megger uses much higher voltages to check resistance than a normal Volt-ohm meter. Minimum resistance is 1 Meg Ohm Shunt Overloads 425 All Pages ✔✔(1) A parallel connection. (2) A resistive element placed across the terminals of an armature to bypass a portion of the current. (3) A flexible electrical conductor designed to conduct current around the mechanical joint between two conductors. (4) The resistive element (Usually of very low resistance) used in parallel with a DC ammeter movement to bypass a calibrated portion of the total circuit current. You are using a Temp Run Box and you get shocked! Why! 520 Pg. 4 ✔✔Bad Ground Bridal Hitch 128 Pg 17 ✔✔The bridle hitch can consist of two,three, or four single hitches (fig. 3-22), used together to form a bridle hitch for hoisting an object A sling with two legs used to lift a 1,000 pound object will have 500 pounds of the load on each leg when the sling angle is 90 degrees. The load stress on each leg increases as the angle decreases; and if the sling angle was 30 degrees lifting the same 1,000 pound object, the load will be 1,000 pounds on each leg. Try to keep all sling angles greater than 45 degrees; sling angles approaching 30 degrees are considered extremely hazardous and must be avoided at all cost. Scaffolding, You have 32' of rise, you are using 3x5 scaffolding. Where will the tie off points be ? 140 PG. 287-288 ✔✔Scaffolding should be tied to the structure using #9 wire or tie-in devices. The first vertical tie should be at the maximum height of 4 times the narrowest base dimension. Additional ties are not to exceed 26' vertically. Maximum horizontal distance between ties is not to exceed 30'. How much should Counterweight way? 240 Pg. 14 ✔✔Counterweights (Typically) are hung to counter balance the weight of the car PLUS 40% of Capacity Load. Pulling Spare Wires (Example) 10% of 52 Wires 515 Pg.26 ✔✔Note: We do not use wire smaller than #20 in travelling cables and #24 outside travelers. Largest wires are feeders to Hoist /Pump motor We always have 10 % spares 10% of 52 = 5.2 On a calculator Multiply the percent 10 by the number you have and ÷ by 100 10 X 52 ÷ 100 = 5.2 The freight door motor is spinning but the door wont move, Why? 535 Pg. 9 ✔✔The correct lube must be used on chains. Read Lula and Dumb waiters 545 Pg 1 ✔✔Lula: Limited use/Limited Access (Example Wheelchair Lifts) [Show More]
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