Vernier Calliper Questions

Pierre Vernier is the French mathematician who invented the vernier calliper. A vernier calliper is a measuring tool used for measuring linear dimensions and measuring the diameters of round objects. Parts of vernier callipers include main scale division, vernier scale division, lower jaws, upper jaws, depth rod, thumb screw, and lock screw.

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Important Vernier Calliper Questions with Answers

1. The least count of a vernier calliper is also known as _____.
2. Vernier count
3. Vernier sample
4. Vernier constant
5. Vernier calibration

Answer: c) Vernier constant.

Explanation: Least count of vernier calliper is referred to as a Vernier constant.

2. What is the main scale and vernier scale?

The vernier callipers have two scales: the main scale and the vernier scale. The difference between one main scale division and one vernier scale division is the least count. The ten divisions on the vernier scale equal nine divisions on the main scale.

3. The least count of a vernier calliper is ______.

1. 1 mm
2. 0.1 mm
3. 0.001 mm
4. 10 mm

Answer: b) 0.1 mm

Explanation: The least count of vernier calliper is 0.1 mm.

4. The difference between the value of one main scale division and one vernier scale division is known as _____.

1. Least count
2. Resolution
3. Actual reading
4. None of the options

Answer: a) Least count

Explanation: Least count compares the value of one main scale division and one vernier scale division.

5. What is a dial calliper?

A dial calliper is a calibrated precision calculating tool used for taking accurate measurements.

6. What are the types of zero error?

Types of zero error are Positive zero error and Negative zero error.

7. If the reading is 0.05 mm, what would be the positive zero error?

1. 0
2. 0.1 mm
3. +0.05 mm
4. -0.05 mm

Answer: c) +0.05 mm

Explanation: The positive zero error is +0.05 mm if the reading is 0.05 mm.

8. Zero error is given by the formula _____.

1. Actual reading = Main scale – Vernier scale – (Zero error)
2. Actual reading = Main scale + Vernier scale – (Zero error)
3. Actual reading = Main scale + Vernier scale + (Zero error)
4. Actual reading = Main scale * Vernier scale – (Zero error)

Answer: b) Actual reading = Main scale + Vernier scale – (Zero error)

Explanation: The formula gives zero error: Actual reading = Main scale + Vernier scale – (Zero error).

9. Which is the large scale on the body of the vernier calliper?

a) Vernier scale

b) Main scale

Answer: b) Main scale

Explanation: The main scale is the large scale on the body of the vernier calliper. It reads the value in millimetres or centimetres.

10. The lowest main scale division is ______.

1. 1 mm
2. 0.1 mm
3. 0.01 mm
4. 10 mm

Answer: a) 1mm

Explanation: The lowest main scale division is 1 mm.

Practice Questions

1. What is meant by a calliper?
2. What is a vernier calliper?
3. The external size of an object is measured using which type of callipers?
4. What is the main function of the thumbscrew?
5. Which jaw is used to measure the internal diameter of an object?

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