Question 135Motor Plants - Assistant Engineer
70% to passThe insertion of shims between the foot of a marine type connecting rod and a bearing box would result in_______________.
Aincreased compression ratio
Bdecreased compression ratio
Cincreased bearing clearance
Ddecreased bearing clearance
AI Explanation
The correct answer is A) increased compression ratio. Inserting shims between the foot of a marine-type connecting rod and the bearing box would increase the distance between the piston and the cylinder head, effectively increasing the compression ratio of the engine. This is because the shims raise the position of the piston in the cylinder, reducing the volume of the combustion chamber and leading to a higher compression ratio. The other options are incorrect because decreasing the bearing clearance (D) would not affect the compression ratio, and decreasing (B) or increasing (C) the bearing clearance would not directly impact the compression ratio.
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