A mechanic measures the diameter of an engine valve stem using a standard 0 to 1-inch outs… — Armed Services Vocational Aptitude Battery (ASVAB)

A mechanic measures the diameter of an engine valve stem using a standard 0 to 1-inch outside micrometer. On the sleeve, the edge of the thimble has uncovered the major graduation mark 3 and 2 additional minor graduation lines. On the thimble, graduation line 18 aligns precisely with the sleeve index line. What is the total measured diameter of the valve stem in inches?

Cevap: 0.368 in

Cevap

The total measured diameter of the valve stem is

0.368\text{ inches}

A standard imperial micrometer sleeve displays major marks at increments of

0.100\text{ in}

and minor subdivision marks at increments of

0.025\text{ in}

. Uncovering the major mark 3 gives

0.300\text{ in}

, and uncovering 2 minor marks adds

0.050\text{ in}

, creating a sleeve subtotal of

0.350\text{ in}

. Adding the aligned thimble reading of 18 thousandths (

0.018\text{ in}

) results in a total diameter of

0.300 + 0.050 + 0.018 = 0.368\text{ inches}

Adım Adım Çözüm

Determine the value of the major divisions uncovered on the sleeve.

The number 3 represents

3 \times 0.100\text{ in} = 0.300\text{ in}

Each numbered graduation line along the sleeve index line represents one-tenth of an inch (

0.100\text{ in}

Determine the value of the visible subdivision lines on the sleeve.

Two minor lines represent

2 \times 0.025\text{ in} = 0.050\text{ in}

Each space between major tenths is subdivided into four increments, each representing twenty-five thousandths of an inch (

0.025\text{ in}

Determine the value of the graduation on the thimble aligned with the sleeve index line.

Graduation 18 represents

18 \times 0.001\text{ in} = 0.018\text{ in}

The circumference of the thimble is divided into 25 equal increments, each representing one-thousandth of an inch (

0.001\text{ in}

Add the sleeve major reading, sleeve minor reading, and thimble reading together.

0.300\text{ in} + 0.050\text{ in} + 0.018\text{ in} = 0.368\text{ in}

The complete measurement is the sum of all three distinct scale components.

Anahtar Kavram

Reading a standard imperial outside micrometer by summing sleeve tenths (

0.100\text{ in}

), sleeve quarter-tenths (

0.025\text{ in}

), and thimble thousandths (

0.001\text{ in}

Tahmini Süre:1m 0s

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