Match each length measuring instrument listed on the left with its standard precision and … — JAMB UTME

Match each length measuring instrument listed on the left with its standard precision and appropriate physical measurement application on the right.

Metre rulePrecision of $0.1\text{ cm}$ ( $1\text{ mm}$ ); used for measuring object lengths such as a pendulum rod.
Vernier caliperPrecision of $0.01\text{ cm}$ ( $0.1\text{ mm}$ ); used for measuring internal and external diameters of test tubes.
Micrometer screw gaugePrecision of $0.01\text{ mm}$ ( $0.001\text{ cm}$ ); used for measuring extremely small lengths such as wire diameter.
Flexible measuring tapePrecision of $0.1\text{ cm}$ ( $1\text{ mm}$ ); used for measuring larger flexible distances such as waist circumference or room dimensions.

Metre rule matches precision

0.1\text{ cm}

for pendulum rod; Vernier caliper matches precision

0.01\text{ cm}

for tube diameters; Micrometer screw gauge matches precision

0.01\text{ mm}

for wire diameter; Flexible measuring tape matches precision

0.1\text{ cm}

for flexible/large distances.

Each instrument is matched according to its fundamental physical least count and specialized geometry: Metre rule measures rigid lengths to

0.1\text{ cm}

, Vernier caliper measures internal/external diameters to

0.01\text{ cm}

, Micrometer screw gauge measures fine dimensions to

0.01\text{ mm}

, and flexible measuring tape measures long or curved distances to

0.1\text{ cm}

Identify the least count (precision) of each measuring instrument.

Metre rule:

0.1\text{ cm}

, Vernier caliper:

0.01\text{ cm}

, Micrometer screw gauge:

0.01\text{ mm}

, Measuring tape:

0.1\text{ cm}

Least count defines the minimum measurable dimension and precision limit for each tool.

Match each instrument to its specific physical design feature and suitable application.

Metre rule

\rightarrow

rigid straight measurements (pendulum rod); Vernier caliper

\rightarrow

internal/external diameters (jaws); Micrometer screw gauge

\rightarrow

very thin objects (wire diameter); Tape measure

\rightarrow

curved/large dimensions.

The mechanical structure of the instrument dictates its intended physical measurement domain.

Instrument least count and application domain in length measurement

Question