Question

amt general comp 13: question 49 of 60
what precision measuring tool is used for measuring crankpin and main bearing journals for out - of - round wear?
a dial gauge.
b micrometer caliper.
c depth gauge.

Explanation:

A micrometer caliper is a precision measuring tool used to measure the diameter of cylindrical objects like crankpin and main bearing journals. It can accurately detect out - of - round wear by taking multiple diameter measurements around the circumference of the journal. A dial gauge is more commonly used for measuring linear displacements or comparing sizes rather than precise diameter measurements for out - of - roundness. A depth gauge is used for measuring the depth of holes or recesses, not the diameter of cylindrical components.

Answer:

B. Micrometer caliper.