MIBCEl.LAXKOL'8 QUKBTIOXS I'l 



14 What is a set screw ? (live an esampto of the use of a aet~ 



15. Khow by ketehea some method of preventing A nut from 

 king Io.e. State the advantage due to the use of a 

 hexagonal nut as compared with A |uare one. 

 lontion aome tmitancea In machine construction in 



it working loose, and other cases in whit h Midi * 

 .nmwMMry. With the aid of .kotch*. .!... 

 inthod vinploywi to prevent unscrew 

 -ketch Mid deaoribe a coMtructiun m i 



t.)uu)ded acrew rod nwy be adjttftt. 

 length ; or tketeh And describe any alternative methyl l>\ 

 1) tlu- U-ti^th may be adjusted. Mention one e&m|.l.- 

 in which such an adjuatment may be neoeaaary. 



'lie iiKnli-M <>f fixing a wheel nr pulley by 

 a sunk key, by cone key*, anl by ataking 



.ea how a whe. n nhnft ly mean* 



of it .mi- ' '. li'.w the key may be withdrawn 



when it cannot b* >m the p . 



20. A fly-wheel ia reqatred to be aeeured to a shaft by meana of 

 sunk \ in contact uith th,- Hh.-,.l. th, 



ahaft baa a collar, and on the other aide the shaft t u|>. 

 ported in a bearing. Khow how to conatruct the wheel 

 eating, the key and key-way, so that the key may be 

 mi lit and removed when neoeaaary. 



: 1 . 1 ) >B t iiiuuiali between a key and a cotter. Draw an example 



ol each, stating the purpose for which each ia employed. 

 88. ( ; . ejection with one another, showing how 



the parta of a machine are united by a cotter. By refer- 

 ence to the sketches explain what ia meant by the draw of 

 a cotter and show 

 83. K uethoOs by which a cotter may be prevontttl faun 



slacking back. 

 24. How much stronger ia a ; n h*ft than a 



2-inch wrought -inm sh.> ' f 



85. Give sketches showing how the separate lengths of a line of 



ahafting may be connected together. 



80. Sketch the brasses f.-r it bearing, and show how they are 

 .; in the pedestal. 



