What are the main functions of the lubricating oil in an engine? I - Reduce friction between parts in contact. II - Act as a cleaning agent, remov...
What are the main functions of the lubricating oil in an engine?
I - Reduce friction between parts in contact.
II - Act as a cleaning agent, removing carbons and metal particles that form during engine operation.
III - Provide auxiliary cooling in 2-stroke engines.
IV - Act as a seal between the piston rings and the cylinder wall.
V - Reduce noise by cushioning shocks and loads between bearings.
a) Only I, II and IV are correct.
b) Only III and V are correct.
c) All statements are correct.
d) Only II, IV and V are correct.
I - Reduce friction between parts in contact.
II - Act as a cleaning agent, removing carbons and metal particles that form during engine operation.
III - Provide auxiliary cooling in 2-stroke engines.
IV - Act as a seal between the piston rings and the cylinder wall.
V - Reduce noise by cushioning shocks and loads between bearings.
a) Only I, II and IV are correct.
b) Only III and V are correct.
c) All statements are correct.
d) Only II, IV and V are correct.
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💡 1 Resposta
Ed 
A resposta correta é a alternativa "a) Only I, II and IV are correct." As principais funções do óleo lubrificante em um motor são: reduzir o atrito entre as peças em contato (I), atuar como agente de limpeza, removendo carbono e partículas metálicas que se formam durante a operação do motor (II) e atuar como vedante entre os anéis do pistão e a parede do cilindro (IV).
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