Question

question 2

1. different types of engine bearings are ....

d. b&c
c. roller
b. plain
a. military

Explanation:

Engine bearings are categorized by their design. Plain bearings (solid, non-rolling surface contact) and roller bearings (using rolling elements for reduced friction) are both common types of engine bearings. "Military" refers to a use case, not a bearing type.

Answer:

d. B&C