• 

  1. Which of the above is down cutting?

  A B

• 2. Down cut machining is generally used when end milling, when would up cut be used?

  AUp cut would be recommended if there were any backlash in the machine drive. BUp cut would be recommended if there was not any backlash in the machine drive.

• 3. As the amount of tool overhang increases this will result in?

  ADeeper machining of cavities can be machined without any reduction in tool life. BThere will be no effect at all on the amount of deflection nor tool life. CAn increase in deflection at the tip of the end mill that can lead to reducing tool life.

• 4. As the helix angle of an end mill increases; which of the following is true?

  ACutting resistance increases and surface finish decreases. BCutting resistance decreases and surface finish improves. CWall deflection increases and cutting edge sharpness decreases.

• 5. As the web thickness increases; which of the following is true?

  AOverall chip disposal and tool rigidity increase. BThere is no effect on either tool rigidity or chip disposal. COverall tool rigidity increases but chip disposal reduces.
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  6. The positive rake type is used for general purpose end mills, what is the negative rake end mill used for?

  AThe machining of aluminium alloys. BThe machining of hardened materials.

• 7. Which of the following is incorrect? The topic being comparing the advantages of radius end mill with ball nose end mills;

  ABall nose end mills offer higher tool rigidity. BRadius end mills offer higher tool rigidity. CBetter surface finishes with increased machining productivity can be achieved when using a radius end mill.

• 8. Can radius end mills be used to machine concave curved surfaces?

  ANo. BYes.

• 9. Which offers high machining productivity?

  AMachining using a radius end mill. BMachining using a ball nose end mill.

• 10. Regarding the number of flutes, what applications would be recommended for a 2 to 3 flute end mill?

  ASlotting and machining of curved surfaces. BShoulder milling only. CShoulder milling and machining of curved surfaces.
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