Understanding Metric Dial Calipers

Bob Welds introduces how to read a metric dial caliper, focusing on understanding the main and dial scales. The tutorial includes practice exercises and guidance on handling partial marks. The video concludes with a final practice session to reinforce learning.

What is the precision level of the metric dial caliper discussed in the video?

• 1/10th of a millimeter

• 1/10000th of a millimeter

• 1/100th of a millimeter

• 1/1000th of a millimeter

What does each mark on the main scale of the caliper represent?

• Millimeters

• Inches

• Micrometers

• Centimeters

What is the main purpose of the reference edge on the caliper?

• To calibrate the dial

• To read the main scale

• To measure depth

• To align the caliper

How many digits follow the decimal point in the dial reading?

• Three digits

• One digit

• Four digits

• Two digits

If the main scale reads 15 mm and the dial reads 24, what is the total measurement?

• 24.51 mm

• 15.42 mm

• 15.24 mm

• 24.15 mm

What should you do if a mark on the main scale is partially visible?

• Count it if the dial is on a large number

• Count it if the dial is on a small number

• Never count it

• Always count it

What is the correct reading if the main scale shows 22 mm and the dial shows 98?

• 22.98 mm

• 22.89 mm

• 23.98 mm

• 21.98 mm

What should you do if the dial shows a large number like 96, 97, 98, or 99?

• Count the partial mark

• Ignore the partial mark

• Add 1 to the main scale

• Subtract 1 from the main scale

What is the correct reading if the main scale shows 20 mm and the dial shows 01?

• 20.1 mm

• 20.01 mm

• 20.10 mm

• 20.00 mm

Why is it important to always read two decimal places from the dial?

• To match the main scale

• To avoid confusion with inches

• To make calculations easier

• To ensure accuracy