General Subjects (Auxiliaries & Systems) USCG Question #1741 (Set 27)

The reading on the vernier caliper scale shown in figure "G" in the illustration is __________. Illustration GS-0082

USCG Exam Illustration GS-0082
USCG Examination Diagram: Illustration GS-0082
Official USCG Answer & Rule Citation

Correct Answer: Option B — 2.368 inches

Vernier calipers are read by noting the main scale position before the zero mark on the vernier scale, then identifying which vernier graduation aligns perfectly with a main scale mark. This provides the fractional decimal reading, which in this illustration confirms a total measurement of 2.368 inches for the workpiece.

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