Question

1. a prelubricator is used to perform each of the following tasks except:

a. locate worn engine bearings
b. keep contaminants out of oil
c. prime oil galleries after overhaul
d. force oil through system without engine on.

Explanation:

A prelubricator is used for priming oil galleries (c), forcing oil without engine running (d), and can help detect issues like worn bearings (a) by showing pressure changes. However, keeping contaminants out of oil is done by filters, not a prelubricator. So the task a prelubricator does not perform is keeping contaminants out of oil.

Answer:

b. Keep contaminants out of oil