Units & Measurements: Screw Gauge & Vernier MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

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Screw Gauge & VernierMediumQuestion 5023

Question

While measuring the thickness of a glass plate with a screw gauge, the main scale reads 2 mm and the circular scale reads 30 divisions (LC = 0.01 mm). The thickness is:

A
2.30 mm
Correct
B
2.03 mm
C
23.0 mm
D
0.230 mm

Correct answer

2.30 mm

Explanation

Thickness = Main scale reading + (CSR × LC) = 2 mm + (30 × 0.01 mm) = 2 + 0.30 = 2.30 mm.

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