-EXAM leea

LEEA Correspondence Courses ASSIGNMENT 3.11 TOTAL TOTA L MARK

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Please note: Use the up and down cursor keys to move between fields in this form. Enter your name and student number in the spaces below. Name: OGEH EE!OH "tudent number: #$%& 'nswer the followin( )uestions by typin( into the (rey fields. f ields. *he fields will e+pand to accommod accommodate ate your answer but keep your answers as brief as possible. *he marks allocated to each )uestion are shown and are in proportion to the amount of work we e+pect will be re)uired to answer the )uestion. ,hen complete- save the file usin( the same name. *hen use the upload facility to return it for markin(.

1.

The The max maxim imum um peri period od betw betwee een n the the thro throug ugh h exa exami minat natio ions ns of of han hand d cha chain in bloc blocks ks allowed by LOLER is:  months ! months $ 1" months 1# months

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To sho show w that that the the man manuf ufact actur urer er has has com compl plied ied with with the the ess essen enti tial al safe safety ty re% re%ui uirem remen ents ts lifting e%uipment must be &E marked. This is a re%uirement of: The 'actories (ct 1!1 The )ealth and *afety at +ork +ork (ct 1!,# The -anagement of )ealth and *afety at +ork +ork Regulations 1!!" $ The *upply of -achinery *afety/ Regulations 1!!"

0.

+hen +hen a user user mak makes es an an item item of of lift liftin ing g e%ui e%uipm pmen entt for for his his own own use use eg a spre spread ader er beam beam and has it tested by a lifting e%uipment company: The test company is responsible for issuing an E& 2eclaration of &onformity $ The user is responsible for issuing an E& 2eclaration of &onformity The )*E must issue an E& 2eclaration of &onformity 3o need for an E& 2eclaration of &onformity &onformity as it is for the users own use

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The The lega legall duty duty of of an empl employ oyer er to to kee keep p wor work k e%ui e%uipm pmen entt prop properl erly y mai maint ntain ained ed is is a re%uirement of: The *upply of -achinery *afety/ Regulations The -aintenance of +ork +ork E%uipment *afety/ Regulations +ork E%uipment Regulations $ The 4ro5ision and use of +ork The -anual )andling Regulations

6 Lifting E%uipment Engineers (ssociation "711 8 training\3-11e

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9.

+hen introducing a new piece of lifting e%uipment into the work place it must comply with the rele5ant 2irecti5es. This is a re%uirement of: $ The *upply of -achinery *afety/ Regulations1!!" The Lifting 4lant and E%uipment Regulations 1!!" The 4ro5ision and se of +ork E%uipment Regulations 1!!; The Lifting Operations and Lifting E%uipment Regulations 1!!;

-aximum mark

5

our mark

(nswer the following %uestions by typing into the grey fields. The fields will expand to accommodate your answer but keep your answers as brief as possible. The marks allocated to each %uestion are shown and are in proportion to the amount of work we expect will be re%uired to answer the %uestion. . Explain briefly what is meant by 5elocity ratio.
3

our mark

'or tutor=s purposes only

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( lifting machine has a 5elocity ratio of 17 and a mechanical ad5antage of ;. calculate the Efficiency of the machine. Efficiency > -.(? ;77?17 > ;7A (ns.

-aximum mark

2

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( "t *+L snatch block which complied to B* #71; has been repaired and a new swi5el eye head fitting has been fitted. *tate the proof load that should be applied and the reason for this load. 4roof load > # times the +LL.(s the head fitting carries both the load and the effortas full capacity it will be subCect to a force of twice the marked +LL.Dn order to proof load test the head fitting it is therefore necessary to apply a load of # times the marked +LL. -aximum mark

3

our mark



"

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2escribe how you would test the safe operation of a hand chain block brake and explain why this particular test is necessary. By carrying out a thorough 5isual examination'unction testing ( light load test of "A and 9A of the *+LThe reason is to check for the efficiency and integrity of the brake of the chain block. -aximum mark

4

our mark


17.

*tate a/ the maximum permissible wear in a short link load chain fitted to a hand chain block b/ the maximum elongation of a short link load chain fitted to a le5er hoist and c/ the maximum elongation to a roller load chain fitted to a le5er hoist. a/ ;A reduction in diameter. b/ 0A maximum elongation. c/ "A maximum elongation. -aximum mark

3

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11. +hat component of a hand chain block must be checked if the load chain is replacedF The load wheelThe chain guide rollerthe chain stripper and the brake. -aximum mark

2

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1"

+hat would be the effect of fitting a trolley with tapered wheels for R*G onto a B runwayF Because the wheel would only make a point contact with the edge of the flange.This would cause rapid wear to both the track and the wheel.Dt would also increase the trans5erse stress in the flange producing a bending effect so o5erloading the flange and causing it to turn down. -aximum mark

3

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0

10

*ome modern trolleys utilise left and right hand threaded load bars to connect the side plate. +hen examining such trolleys what checks should be made regarding the side platesF &aution is needed to ensure that one side plate has not been turned on the screw more than the other. -aximum mark

2

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1#

+hen examining a hand geared trolley you find one of the links in the hand chain has not been welded. +hat is the reason for this and what action would you takeF The unwelded link on the hand chain is used to passed on the wheel and i will take no action because it is not a defect. -aximum mark

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-EXAM leea

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