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Exam (elaborations)

MECHANICS EXAM QUESTIONS WITH CORRECT SOLUTIONS

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MECHANICS EXAM QUESTIONS WITH CORRECT SOLUTIONS

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100 Elevator
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Uploaded on
January 4, 2025
Number of pages
11
Written in
2024/2025
Type
Exam (elaborations)
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Questions & answers

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MECHANICS EXAM QUESTIONS WITH
CORRECT SOLUTIONS
** qrAn qrMOV qrburns qrout, qryou qrreplace qrit qrbut qrcannot qrread qrvoltage qror qrresistance.
qrWhat qrshould qryou qrdo? qr- qrANS--Replace qrit qrwith qra qrlarger qrone qr(630)



* qrOn qra qrWard-Leonard qrcircuit, qrthe qrbrake qris qrset qrbut qrthe qrmotor qris qrtrying qrto qrslip
qrthrough qrthe qrbrake. qrWhat qrcircuit qris qrthe qrissue? qr- qrANS--Suicide qrcircuit qr(425)



** qrA qrHydro qrruns qrup qrwith qrno qrload qrbut qrdoes qrnot qrrun qrup qrwith qra qrfull qrload. qrWhat qris
qrthe qrissue? qr- qrANS--The qrrelief qrvalve qris qrset qrtoo qrlow qr(805)



** qrRunby qrfor qra qr1:1 qrcar qrhits qrthe qrCWT qrbuffer qr4" qrbelow qrthe qrtop qrlanding. qrThe
qrCWT qrrunby qrshould qrbe qrset qrat qr18". qrHow qrmuch qrshould qrthe qrropes qrbe qrshortened?

qr- qrANS--22" qrfor qr1:1. qr

For qra qr2:1 qrwith qrthe qrsame qrissue qris qr44".

** qrYou qrneed qrto qrwork qron qra qrfreight qrdoor qrretiring qrcam. qrYou qrLOTO qrthe qrmainline
qrdisconnect qrbut qrthere qris qrstill qrpower qrto qrthe qrcam. qrWhat qrcircuit qris qrstill qrhot? qr-

qrANS--Mainline qrdisconnect qr(535)



** qrThe qrcontractor qrrequests qrthat qrthe qrvertical qrcenter qrof qrthe qrRack qrand qrPinion qrhoist
qrbe qrmoved. qrHow qris qrthis qraccomplished? qr- qrANS--Adjust qrTie qrdowns/Wall qrties qr(805)



** qrWorking qrpressure qron qra qrHydro qris qr400 qrPSI. qrWhat qris qrthe qrcorrect qrRelief qrValve
qrSetting? qr- qrANS--600 qrPSI qrMax. qr(805)

400 qrpsi qrx qr150% qr= qr600 qrpsi

** qrA qrcontractor qrwants qrto qrraise qrthe qrcar qrspeed qrfrom qr100 qrFPM qrto qr125 qrFPM. qrIt
qrcurrently qrhas qra qr12" qrsheave. qrWhat qrsize qrsheave qris qrrequired? qr- qrANS--15"

(125 qr/100 qr= qr1.25 qr1.25 qrx qr12 qr= qr15)

** qrThere qris qrslight qrarcing qrat qrthe qrBrushes qrand qrCommutator. qrWhat qractions qrmust qrbe
qrtaken? qr- qrANS--None. qr(430)

"Heavy qrarcing qris qrdue qrto qrlight qrbrush qrpressure. qrMechanical qrwear qrindicates qrheavy
qrbrush qrpressure.



** qrHow qrmuch qrresistance qris qrnormally qrmeasured qracross qra qrnormally qrclosed qrswitch
qr? qr- qrANS--1.2 qrohms qror qr1 qrto qr2 qrohms



** qrA qrcar qrtraveling qrin qrthe qrhoistway qralways qrstops qrat qrthe qrsame qrpoint qrand qrblows qra
qrfuse. qrWhat qris qrthe qrproblem? qr- qrANS--Traveling qrcable qrhas qra qrcut qror qrshort

, ** qrHow qris qra qrClass qr1 qr(yearly) qrbuffer qrtest qrperformed? qr- qrANS--At qrslow qrspeed qrand
qrthe qrbuffer qrmust qrreturn qrin qr90 qrseconds. qr(555) qr*(60 qrseconds qris qracceptable) qr(90

qrseconds qris qrcode)

5 qryear qrtest qr(Class qr5) qris qrcar qrat qrrated qrload qrand qrspeed. qrBuffer qrmust qrreturn qrin qr90
qrseconds. qrCWT qrat qrrated qrspeed qrand qrbuffer qrmust qrreturn qrin qr90 qrseconds.



** qrHow qrmany qrStrain qrSupports qrare qrrequired qron qra qr350' qrraceway? qr- qrANS--4
One qrfor qrevery qr100'

** qrHow qris qrStainless qrsteel qrdrilled qrout? qr- qrANS--Slow qrspeed qrand qrconstant qrpressure
qr(205)



** qrWhat qrare qrthe qrrequired qramount qrof qrclips qrfor qrWedge qrShackles qrand qrwhat qris qrtheir
qrspacing? qr- qrANS--At qrleast qr2, qrwith qrthe qrfirst qrbeing qr4 qrtimes qrthe qrdiameter qrof qrthe

qrrope qrfrom qrthe qrtop qrof qrshackle. qr

Second qris qr8 qrtimes qrthe qrdiameter qrof qrthe qrrope qrfrom qrthe qrfirst.

** qrCar qris qrloaded qrwith qr125% qrand qrsinks. qrWhy? qr- qrANS--Slipped qrthrough qrthe qrbrake.

** qrA qr300 qrOhm qrresistor qrburns qrout. qrYou qrdon't qrhave qra qr300 qrOhm qrresistor qrto
qrreplace qrit. qrWhat qrcan qryou qruse qrto qrmake qrup qrthe qrresistor? qr- qrANS--2 qr600 qrOhms

qrresistors qrin qrParallel. qr"The qrresistance qris qrhalf qrof qrthe qrhighest qrrating qrin qra qrparallel

qrcircuit. qr

3, qr225 qrOhm qrresistors qrin qrparallel qrequal qr75 qrOhms.

** qrA qr480 qrVAC qrStep qrDown qrTransformer qris qrconnected qrto qra qr3 qrphase qrrectifier.
qrWhat qrwill qrthe qroutput qrbe? qr- qrANS--320 qrVDC

480 qr- qr33.33% qr= qr320

** qrIf qryou qrfind qra qrbroken qror qrmissing qrbarricade, qrwhat qrdo qryou qrdo? qr- qrANS--Write qrup
qra qrformal qrinspection qrrequest.



** qrIf qra qrDumbwaiter qrhas qr9 qrsquare qrfeet qrin qrArea, qr
4 qr' qrHigh qrand qrthe qrrated qrCapacity qris qr13.9 qrlb/ft3, qrwhat qris qrthe qrtotal qrcapacity? qr-
qrANS--500 qrlb/ft3. qr

"The qrarea qrof qra qrDumbwaiter qris qr9 qrsq' qrmax qrand qris qr4' qrHigh. qrMultiply qrthat qrby qr13.9. qr
9x4 qr= qr36. qr36 qrx qr13.9 qr= qr500

** qrWhat qrare qrthe qrconsequences qrof qra qrmisaligned qrRack qrand qrPinion qrhoist qrjoint? qr-
qrANS--Broken qrGear qrTeeth qr(850) qrMotor qrnot qraligned.



** qrYou qrenter qra qrPit qrwhere qrtoxic qrfumes qrare qrpresent. qrHow qrdo qryou qrproceed? qr-
qrANS--Follow qrproper qrprocedures. qr

"Confined qrSpace qrentry qrprocedures qrare qrnow qrguided qrby qrOSHA qrfor qrpit qrentry".

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