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A French Man, Leon Edoux, developed the first _________ action hydraulic elevator by use of a jack assembly sunk into the ground as deep as the height of the building. - ✔✔Direct C.W. Baldmin's______action hydraulic elevator in 1872 revolutionized the industry with the use of a comparitively short jack assembly, rope and sheave combination. - ✔✔Indirect Builder today using hydraulic elevators typically save money because the cost of ________ and _______ are less than traction - ✔✔equipmnt/ hoistway construction The __________ unit supplies oil to the jack assembly - ✔✔hydraulic power Describe the major differences b/w hydro and traction - ✔✔ropes v plunger The ____ attaches the plunger to sling - ✔✔platen plate Traction needs more _____ and ____ than hydro - ✔✔contactors and power In a team who is responsile for safety - ✔✔errybody
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A French Man, Leon Edoux, developed the first _________ action hydraulic elevator by use of a jack assembly sunk into the ground as deep as the height of the building. - ✔✔Direct C.W. Baldmin's______action hydraulic elevator in 1872 revolutionized the industry with the use of a comparitively short jack assembly, rope and sheave combination. - ✔✔Indirect Builder today using hydraulic elevators typically save money because the cost of ________ and _______ are less than traction - ✔✔equipmnt/ hoistway construction The __________ unit supplies oil to the jack assembly - ✔✔hydraulic power Describe the major differences b/w hydro and traction - ✔✔ropes v plunger The ____ attaches the plunger to sling - ✔✔platen plate Traction needs more _____ and ____ than hydro - ✔✔contactors and power In a team who is responsile for safety - ✔✔errybody when barricades - ✔✔after rough or finished floors are in when work below someone - ✔✔proper protection what should be on hand when burning or welding - ✔✔extinguisher jack hole must be drilll _____ ______ and to proper - ✔✔straight/plumb/depth
3 most important when drilling - ✔✔hole depth, soil conditions, drilling conditions if hard rock is present it is usuall beter before or after building is erected - ✔✔before three general classes of drilling - ✔✔percussion, rotary, combination percussion is used when _______ and _____ - ✔✔extremely deep hole, and noraml drill wont do it percussion can be compared to - ✔✔pile driver what keeps hole clean during drilling - ✔✔bailer use _______ to check casing is straight and plumb - ✔✔spider bob core drilling is usually use on - ✔✔compacted soil, clay, and shale core bit normally made of - ✔✔pipe or hollow tubing auger usually used on - ✔✔soft soil auger resembles - ✔✔giant screw percusion drilling inside a building can cause - ✔✔dagerous vibration to a building usually used inside - ✔✔auger throw your dirt away - ✔✔
a one-piece jack assembly consists of - ✔✔cylinder and plunger the capacity of the hoisting equipment - ✔✔capable of holding gross load pit channels - ✔✔positioned before jack is completely lowered cylinder sections should be - ✔✔cleaned out before first one in is the bottom - ✔✔ held by - ✔✔cylinder clamp dont cross threads - ✔✔ certified welder - ✔✔ cylinder joint should be tack welded - ✔✔to prevent warping two - ✔✔lines need to be attached to check plumb leading cause of cylinder failure - ✔✔corrosion the electrochemical reaction between metal and its environment - ✔✔electrolysis two major causes of corrosion - ✔✔galvanic and stray current when using cathodic protection - ✔✔the corrosion only occurs at the anode
two types of cathodic protection - ✔✔impressed current , galvanic anode backfill - ✔✔clean sand throw your dirt away - ✔✔ spider bob wire - ✔✔top and center of hoistway dogleg - ✔✔ b - ✔✔b when ever u leave pit put a covr on the bitch - ✔✔ plunger surface should be cleaned with entry cloth - ✔✔and coated with hydraulic oil plunger splices made with - ✔✔screw or bolt alignment marks must line up when threading - ✔✔ hoistway, MR, jack are located - ✔✔final layout drawing check distance between landings to be correct per prints - ✔✔ if it waries more than an inch - ✔✔game over most dangers repair - ✔✔packing