Free Caliper Vernier Measurement Questions and Answers — Questions and Answers

Question 1: What measurement(s) below cannot be taken with a vernier caliper?

Measuring the length of an iron nail
Measuring the height of a tower (Correct answer)
measuring a spherical or cylindrical object's outer diameter
Determining a cylindrical object's interior diameter or a vessel's depth

Correct answer: Measuring the height of a tower

A Vernier caliper is a precision instrument designed for measuring small dimensions, typically up to a few hundred millimeters or several inches. It is used for internal, external, depth, and step measurements of objects. Measuring the height of a tower, which is a large-scale measurement, is far beyond the practical range and capability of a Vernier caliper, requiring tools like a tape measure, laser distance meter, or surveying equipment.

Question 2: What is the name of the component in the diagram labeled B?

Outside jaws
Slider
Depth bar
Main scale
Internal jaws (Correct answer)

Correct answer: Internal jaws

In a typical caliper diagram, the component labeled 'B' refers to the internal jaws. These are the smaller, upper jaws designed specifically for measuring the internal dimensions of an object, such as the diameter of a hole or the width of a slot. They are distinct from the larger outside jaws used for external measurements.

Question 3: The red line indicates the coinciding lines. What measurement do you have?

38 cm
15.46 mm
38 mm
15.46 cm (Correct answer)

Correct answer: 15.46 cm

To read a Vernier caliper, first identify the main scale reading just before the zero mark of the Vernier scale, which is 15.4 cm. Then, find the line on the Vernier scale that perfectly aligns with a line on the main scale; if this is the 6th division and the least count is 0.01 cm, it adds 0.06 cm. Adding these values gives a total measurement of 15.4 cm + 0.06 cm = 15.46 cm.

Question 4: What is the best answer?

1,23 mm
0,23 mm
1,55 mm (Correct answer)
0,55 mm

Correct answer: 1,55 mm

To determine the measurement, first read the main scale value just before the Vernier scale's zero mark. If this is 1.5 mm, then identify the Vernier scale division that perfectly aligns with any main scale division. If the 5th Vernier mark aligns and the least count is 0.01 mm, this adds 0.05 mm to the reading. Therefore, the total measurement is 1.5 mm + 0.05 mm = 1.55 mm.

Question 5: What is the minor count of the standard metric vernier caliper?

0.02mm (Correct answer)
0.2mm
0.5mm
0.1mm

Correct answer: 0.02mm

The 'minor count' is synonymous with the least count of a measuring instrument, representing the smallest measurement it can accurately resolve. For a standard metric Vernier caliper, the most common and widely used least count is 0.02 mm. This precision allows for detailed measurements in various technical applications.

Question 6: What dimension does the caliper indicate?

39mm
40mm (Correct answer)
40.4mm
40.2mm

Correct answer: 40mm

To read a caliper, first identify the main scale reading just before the zero mark of the Vernier scale. If the zero mark of the Vernier scale aligns exactly with the 40mm mark on the main scale, and no Vernier division coincides before it, the reading is precisely the main scale value. Therefore, the caliper indicates 40mm.

Question 7: What is the smallest measurement a vernier caliper can take?

Vernier scale division
Actual reading
Main scale division
Least count (Correct answer)

Correct answer: Least count

The smallest measurement a Vernier caliper can accurately take is known as its 'least count.' The least count represents the precision of the instrument and is determined by the difference between one main scale division and one Vernier scale division. It indicates the minimum change in measurement that the caliper can reliably detect.

Free Caliper Vernier Measurement Questions and Answers

What measurement(s) below cannot be taken with a vernier caliper?