MECHANICS EXAM WITH FULL PACK
SOLUTIONS
** dAn dMOV dburns dout, dyou dreplace dit dbut dcannot dread dvoltage dor dresistance.
dWhat dshould dyou ddo? d- dcorrect danswers d-Replace dit dwith da dlarger done d(630)
* dOn da dWard-Leonard dcircuit, dthe dbrake dis dset dbut dthe dmotor dis dtrying dto dslip
dthrough dthe dbrake. dWhat dcircuit dis dthe dissue? d- dcorrect danswers d-Suicide dcircuit
d(425)
** dA dHydro druns dup dwith dno dload dbut ddoes dnot drun dup dwith da dfull dload. dWhat
dis dthe dissue? d- dcorrect danswers d-The drelief dvalve dis dset dtoo dlow d(805)
** dRunby dfor da d1:1 dcar dhits dthe dCWT dbuffer d4" dbelow dthe dtop dlanding. dThe
dCWT drunby dshould dbe dset dat d18". dHow dmuch dshould dthe dropes dbe dshortened?
d- dcorrect danswers d-22" dfor d1:1. d
For da d2:1 dwith dthe dsame dissue dis d44".
, ** dYou dneed dto dwork don da dfreight ddoor dretiring dcam. dYou dLOTO dthe dmainline
ddisconnect dbut dthere dis dstill dpower dto dthe dcam. dWhat dcircuit dis dstill dhot? d-
dcorrect danswers d-Mainline ddisconnect d(535)
** dThe dcontractor drequests dthat dthe dvertical dcenter dof dthe dRack dand dPinion dhoist
dbe dmoved. dHow dis dthis daccomplished? d- dcorrect danswers d-Adjust dTie
ddowns/Wall dties d(805)
** dWorking dpressure don da dHydro dis d400 dPSI. dWhat dis dthe dcorrect dRelief dValve
dSetting? d- dcorrect danswers d-600 dPSI dMax. d(805)
400 dpsi dx d150% d= d600 dpsi
** dA dcontractor dwants dto draise dthe dcar dspeed dfrom d100 dFPM dto d125 dFPM. dIt
dcurrently dhas da d12" dsheave. dWhat dsize dsheave dis drequired? d- dcorrect danswers
d-15"
(125 d/100 d= d1.25 d1.25 dx d12 d= d15)
** dThere dis dslight darcing dat dthe dBrushes dand dCommutator. dWhat dactions dmust
dbe dtaken? d- dcorrect danswers d-None. d(430)
"Heavy darcing dis ddue dto dlight dbrush dpressure. dMechanical dwear dindicates dheavy
dbrush dpressure.
** dHow dmuch dresistance dis dnormally dmeasured dacross da dnormally dclosed dswitch
d? d- dcorrect danswers d-1.2 dohms dor d1 dto d2 dohms
** dA dcar dtraveling din dthe dhoistway dalways dstops dat dthe dsame dpoint dand dblows
da dfuse. dWhat dis dthe dproblem? d- dcorrect danswers d-Traveling dcable dhas da dcut dor
dshort
** dHow dis da dClass d1 d(yearly) dbuffer dtest dperformed? d- dcorrect danswers d-At dslow
dspeed dand dthe dbuffer dmust dreturn din d90 dseconds. d(555) d*(60 dseconds dis
dacceptable) d(90 dseconds dis dcode)
5 dyear dtest d(Class d5) dis dcar dat drated dload dand dspeed. dBuffer dmust dreturn din d90
dseconds. dCWT dat drated dspeed dand dbuffer dmust dreturn din d90 dseconds.
** dHow dmany dStrain dSupports dare drequired don da d350' draceway? d- dcorrect
danswers d-4
One dfor devery d100'
** dHow dis dStainless dsteel ddrilled dout? d- dcorrect danswers d-Slow dspeed dand
dconstant dpressure d(205)
** dWhat dare dthe drequired damount dof dclips dfor dWedge dShackles dand dwhat dis
dtheir dspacing? d- dcorrect danswers d-At dleast d2, dwith dthe dfirst dbeing d4 dtimes dthe
ddiameter dof dthe drope dfrom dthe dtop dof dshackle. d
Second dis d8 dtimes dthe ddiameter dof dthe drope dfrom dthe dfirst.
SOLUTIONS
** dAn dMOV dburns dout, dyou dreplace dit dbut dcannot dread dvoltage dor dresistance.
dWhat dshould dyou ddo? d- dcorrect danswers d-Replace dit dwith da dlarger done d(630)
* dOn da dWard-Leonard dcircuit, dthe dbrake dis dset dbut dthe dmotor dis dtrying dto dslip
dthrough dthe dbrake. dWhat dcircuit dis dthe dissue? d- dcorrect danswers d-Suicide dcircuit
d(425)
** dA dHydro druns dup dwith dno dload dbut ddoes dnot drun dup dwith da dfull dload. dWhat
dis dthe dissue? d- dcorrect danswers d-The drelief dvalve dis dset dtoo dlow d(805)
** dRunby dfor da d1:1 dcar dhits dthe dCWT dbuffer d4" dbelow dthe dtop dlanding. dThe
dCWT drunby dshould dbe dset dat d18". dHow dmuch dshould dthe dropes dbe dshortened?
d- dcorrect danswers d-22" dfor d1:1. d
For da d2:1 dwith dthe dsame dissue dis d44".
, ** dYou dneed dto dwork don da dfreight ddoor dretiring dcam. dYou dLOTO dthe dmainline
ddisconnect dbut dthere dis dstill dpower dto dthe dcam. dWhat dcircuit dis dstill dhot? d-
dcorrect danswers d-Mainline ddisconnect d(535)
** dThe dcontractor drequests dthat dthe dvertical dcenter dof dthe dRack dand dPinion dhoist
dbe dmoved. dHow dis dthis daccomplished? d- dcorrect danswers d-Adjust dTie
ddowns/Wall dties d(805)
** dWorking dpressure don da dHydro dis d400 dPSI. dWhat dis dthe dcorrect dRelief dValve
dSetting? d- dcorrect danswers d-600 dPSI dMax. d(805)
400 dpsi dx d150% d= d600 dpsi
** dA dcontractor dwants dto draise dthe dcar dspeed dfrom d100 dFPM dto d125 dFPM. dIt
dcurrently dhas da d12" dsheave. dWhat dsize dsheave dis drequired? d- dcorrect danswers
d-15"
(125 d/100 d= d1.25 d1.25 dx d12 d= d15)
** dThere dis dslight darcing dat dthe dBrushes dand dCommutator. dWhat dactions dmust
dbe dtaken? d- dcorrect danswers d-None. d(430)
"Heavy darcing dis ddue dto dlight dbrush dpressure. dMechanical dwear dindicates dheavy
dbrush dpressure.
** dHow dmuch dresistance dis dnormally dmeasured dacross da dnormally dclosed dswitch
d? d- dcorrect danswers d-1.2 dohms dor d1 dto d2 dohms
** dA dcar dtraveling din dthe dhoistway dalways dstops dat dthe dsame dpoint dand dblows
da dfuse. dWhat dis dthe dproblem? d- dcorrect danswers d-Traveling dcable dhas da dcut dor
dshort
** dHow dis da dClass d1 d(yearly) dbuffer dtest dperformed? d- dcorrect danswers d-At dslow
dspeed dand dthe dbuffer dmust dreturn din d90 dseconds. d(555) d*(60 dseconds dis
dacceptable) d(90 dseconds dis dcode)
5 dyear dtest d(Class d5) dis dcar dat drated dload dand dspeed. dBuffer dmust dreturn din d90
dseconds. dCWT dat drated dspeed dand dbuffer dmust dreturn din d90 dseconds.
** dHow dmany dStrain dSupports dare drequired don da d350' draceway? d- dcorrect
danswers d-4
One dfor devery d100'
** dHow dis dStainless dsteel ddrilled dout? d- dcorrect danswers d-Slow dspeed dand
dconstant dpressure d(205)
** dWhat dare dthe drequired damount dof dclips dfor dWedge dShackles dand dwhat dis
dtheir dspacing? d- dcorrect danswers d-At dleast d2, dwith dthe dfirst dbeing d4 dtimes dthe
ddiameter dof dthe drope dfrom dthe dtop dof dshackle. d
Second dis d8 dtimes dthe ddiameter dof dthe drope dfrom dthe dfirst.
