Reading and Using Dial Calipers

This video tutorial explains how to read a dial caliper, focusing on both the main scale and the dial. The main scale is marked in 0.1 inch intervals, while the dial is marked in 0.001 inch intervals. Reading the caliper involves a two-step process: first, noting the last main scale graduation passed by the sliding jaw, and second, identifying the number the hand points to on the dial. The final measurement is the sum of these two readings.

What is the primary purpose of a dial caliper?

• To measure weight

• To measure temperature

• To measure the dimensions of a workpiece

• To measure electrical current

How is the main scale on an inch caliper marked?

• In 0.1 inch intervals

• In 0.01 inch intervals

• In 0.001 inch intervals

• In 1 inch intervals

What is the graduation interval on the dial of a caliper?

• 0.001 inch

• 1 inch

• 0.01 inch

• 0.1 inch

What does the dial hand indicate?

• The temperature

• The electrical current

• The weight

• The graduation on the dial

What is the first step in reading a dial caliper?

• Check the battery

• Look at the dial

• Look at the sliding jaw

• Calibrate the caliper

What should you note when looking at the sliding jaw?

• The color of the caliper

• The weight of the caliper

• The temperature of the room

• The last main scale graduation passed

What is the main scale reading if the sliding jaw passes the third graduation?

• 3 inches

• 0.03 inches

• 0.3 inches

• 0.003 inches

If the value on the dial is high, what does it indicate?

• The graduation has been passed

• The graduation has not been passed

• The caliper is broken

• The measurement is incorrect

What should you do if the value on the dial is low?

• Ignore it

• Start over

• Recalibrate the caliper

• Note that the graduation has just been passed

What happens to the dial value as the caliper opens?

• It increases

• It remains the same

• It decreases

• It fluctuates