The image shows a
dial caliper used to measure the dimension of an object. The measurement is taken using both the main scale and the dial (rotary) scale.
Let’s break down how to read the dial caliper:
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🔍 Step-by-Step Reading:
#### 1.
Main Scale (Ruler Part):
- The main scale is marked in inches.
- Each large division represents
0.1 inch, and each small tick between them is
0.01 inch.
- Look at where the edge of the movable jaw aligns with the main scale.
From the image:
- The main scale reading is
6.00 inches.
- The zero mark on the dial's frame aligns with the
6-inch mark on the main scale.
- There are no additional smaller divisions past the 6-inch mark that are visible, so we take it as exactly
6.00 inches.
>
✔ Main Scale Reading:
6.00"
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#### 2.
Dial Scale (Rotary Gauge):
- The dial is graduated from 0 to 90, with each number representing
0.001 inch increments.
- The dial has
100 divisions around its circumference, but only 90 are labeled (every 10 divisions).
- Each small tick is
0.001 inch.
From the detail view:
- The needle points just
past the 30 mark.
- Let's count the ticks:
- From 30 to 31: there are 10 small ticks.
- The needle is pointing
at the 4th tick after 30 → that’s
30 + 4 = 34.
So, the dial reading is:
>
✔ Dial Reading:
0.034"
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📐 Final Measurement:
Add the main scale and dial readings:
$$
\text{Total} = \text{Main Scale} + \text{Dial Reading}
$$
$$
= 6.00" + 0.034" = \boxed{6.034"}
$$
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✔ Answer:
The measured dimension is 6.034 inches.
This is a precise measurement using a dial caliper, accurate to
±0.001 inch.
Parent Tip: Review the logic above to help your child master the concept of dial caliper worksheet.
