ecor 1044 week 4

stripping is an example of

• surface mining

• underground mining

• Quarrying

• drilled well

what are plastics created from

what are the steps of processing an ore

• benefaction

• concentration

• smelting

• shaping and sizing

• benefits

which silicon is most pure

• metalic grade

• electronic grade

• silica sand

which type of maintenance preforms regular checks to maintain effective performance to avoid break downs in the future

how much e waste is created each year?

• 400 million pounds

• 100 million tonnes

• 40 million tonnes

• 100 thousand pounds

True or False: when a product is no longer util due to physical deterioration factors, this is called obsolescence

• true

• false

which type of maintenance is used when down time is not ideal but is acceptable to the company?

what does retrofit and grandfathering help overcome

True or False:

when a group is described as a "skunkwork" it often means they work poorly and inefficiently and their poor work produced in know to everyone, just like a skunks smell in public

• true

• false