Engine Repair (A1)第 7 / 120 题
Technician A says low oil pressure only at idle on a high-mileage engine can be caused by worn bearing clearances. Technician B says a worn oil pump or diluted oil can also lower pressure. Who is correct?
a.Technician A only
b.Technician B only
c.Both A and B
d.Neither A nor B
解析
Worn bearing clearances let oil escape faster than the pump maintains pressure at low speed, and a worn pump or fuel-diluted oil reduces pressure as well. Both technicians are correct. Verify with a mechanical gauge before condemning parts.
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