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Physics 5 Online
OpenStudy (anonymous):

A diesel engine a. uses only air during the intake stroke. b. is an external-combustion engine. c. uses a spark plug to ignite fuel. d. uses Freon.

OpenStudy (mos1635):

c seems the logical choise

OpenStudy (stormfire1):

Diesel engines don't have spark plugs :) Answer "a" is correct. I can explain if you like.

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