Vernier Calliper Questions

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Very Short Answers Questions [1 Mark Questions]

Ques. Why is the caliper principle used?

1. For checking flatness
2. For measuring dimensions with a micrometer
3. For measuring dimensions with an vernier caliper
4. For circular divisions

Ans. The correct answer is d. For circular divisions

Explanation: The caliper principle is used for circular division or dividing a circular disc into many sections. Circular division deals with the continuous division of a circle as well as measurement. The accuracy of the equipment and processes used determines the level of accuracy of circular division.

Ques. The least count of a vernier caliper is also known as

1. Vernier calibration
2. Vernier sample
3. Vernier constant
4. Vernier count

Ans. The correct answer is c. Vernier constant

Explanation: The vernier constant is also known as the least count of vernier calipers. It is defined as the difference between one main scale division and one vernier scale division.

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

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

Ans. The correct answer is a. +0.05 mm

Explanation: If the reading is 0.05 mm, the positive zero error is +0.05 mm.

Ques. The lowest main-scale division is

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

Ans. The correct answer is a. 1 mm

Explanation: The smallest division on the main scale of a vernier caliper is 1 mm.

Ques. Zero error is given by the formula

1. Actual reading = Main scale x 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)

Ans. The correct answer is b. Actual reading = Main scale + Vernier scale – (Zero error)

Explanation: When the scale is greater than zero, the zero error is positive; otherwise, it is negative. The following formula is used to use a Vernier scale or zero-error caliper:

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

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

1. Vernier scale
2. Main scale

Ans. The correct answer is b. Main scale

Explanation: The main scale is the largest scale on the vernier calliper's body. It displays the measurement in millimetres or centimetres.

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Short Answers Questions [2 Marks Questions]

Ques. What is a caliper?

Ans. Vernier callipers are instruments for calculating precise linear measures. It determines the horizontal distance between two points. It might be as simple as a compass with points pointing inside or outward. The tips of the calliper are first adjusted to fit across the points to be measured, after which the calliper is removed and the distance between the tips is measured with a ruler.

Ques. What is vernier constant?

Ans. The vernier constant is also known as the least count of vernier calipers. The difference between one main scale division and one vernier scale division is defined. As a result, the least count of the vernier calliper is 0.1 mm.

Ques. What is meant by zero error of a vernier callipers?

Ans. When the zero mark of the vernier scale does not correspond with the zero mark of the main scale due to mechanical errors, the vernier calipers are said to have zero error.

It is calculated by measuring the distance between the main scale's zero mark and the vernier scale's zero mark.

Ques. What is the range of the Vernier caliper?

Ans. The difference between the largest and smallest measurement readings determines the maximum capacity of a vernier caliper. Typically, it is the total length of the main scale of the vernier caliper. The normal range of vernier calipers is 300 mm.

Ques. What is the tolerance of vernier caliper?

Ans. Tolerance (also known as instrument error) is the accuracy of a Vernier caliper's readings. Vernier calipers are useful for calculating low tolerance measurement values. Because the probability of error is low, low tolerance measurement readings produce accurate results. The Vernier calipers have a tolerance of roughly ± 0.03mm (± 0.0015 in).

Ques. What is the resolution of a vernier caliper?

Ans. The resolution of a vernier caliper, also known as vernier reading is the smallest measurable distance that a vernier caliper can obtain.

Vernier calipers generally have a resolution of 0.001 inches, whereas metric vernier calipers have a resolution ranging from 0.02 mm to 0.05 mm.

Also Read:

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Long Answers Questions [3 Marks Questions]

Ques. What are the various parts of the Vernier caliper?

Ans. The various parts of the Vernier caliper are

• Main Scale: It is a large scale that covers the length of the body of the vernier caliper. Depending on the use, the main scale reading can be expressed in centimeters or millimeters.
• Vernier Scale: This is the smallest scale attached to the main scale and moves along it. The movement of the vertical scale is determined by the opening of the jaws. The main role of the vertical scale is to provide accuracy to the main scale reading by dividing the readings into smaller increments.
• Lower Jaws: These jaws are the most prominent part of the vernier caliper. The main role of the lower jaws is to determine the outer dimensions like width, diameter, and length.
• Upper Jaws: These jaws are similar to those of the lower jaws but smaller than it. These are attached to the upper part of the vernier scale. The main role of these jaws is to measure the inside diameter of the objects such as hollow pipes and jars.
• Depth Rod: The depth rod can be used to measure the depth of a jar. It is a thin rod near the bottom of the main scale.
• Thumb Screw: This screw is located at the bottom of the vernier scale. The primary role of the thumb screw is to give users a grip so that moving the jaws becomes easier.
• Lock Screw: The primary function of lock screw is to fix the position of the jaws once the object is fixed between them. This makes it easier to take readings.

Ques. How do you use a vernier caliper?

Ans. The process involved in taking a measurement using a vernier caliper is

• To determine if the main and vernier scales are aligned, the first step is to measure nothing.
• There is no zero error when both the main scale reading and the vernier scale reading are at zero.
• Place a ball between the two jaws of the vernier scale.
• Examine how the 0 mark on the vernier scale lines up with the main scale.
• The main scale reading is provided by it.
• Find the vernier scale reading by finding the point on the vernier scale that is aligned to the main scale.
• It's essential to keep in mind that the readings will often be in decimals.
• The main scale reading is the number before the decimal point, while the vernier scale reading is the number after the decimal point.

Ques. What are the different types of vernier calipers? 

Ans. There are three types of vernier calipers under Indian standards.

• The first type of caliper has a depth gauge in addition to jaws on both sides for both interior and external measurements. The standard material used to make these vernier calipers has a hardness of about 65050 HV (Vickers Pyramid Number).
• The second type of vernier caliper does not have separate jaws for measuring both the interior and exterior of objects. For measuring exterior and interior measurements, it uses a single pair of jaws.
• The third type of vernier caliper is the same as the second type. The knife edge that may be used for marking is the only difference.

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Very Long Answers Questions [5 Marks Questions]

Ques. What are the applications of Vernier Caliper?

Ans. The main function of the vernier caliper is to measure the distance between objects as well as their interior and exterior dimensions, including height. A vernier caliper has a resolution of up to a tenth of a millimeter. Vernier calipers are used in the following sectors:

• It is used in the education sector to monitor temperature-changing materials as well as regular and irregular objects.
• It is used in scientific labs to measure equipment for error-free experiments.
• It is used to measure surgical and medical instruments.
• The steel industry is used to measure the length, width, and height of objects in order to produce consistent products with the same measurements.
• It is used in the aerospace industry to measure even minute details in aerial parts in order to avoid accidents in the air. These vernier calipers provide a high degree of accuracy, resulting in more precise readings.

Ques. What are the advantages of using vernier caliper?

Ans. The following are the advantages of using vernier caliper

• Precision and Accuracy: Vernier calipers are known for their precision and accuracy; this instrument has a strong tendency to provide accurate and precise measurements of various dimensions.
• Twin Scales: Because the main or primary scale and the Vernier or secondary scale are included within the measuring device, an extra measuring device such as a ruler or tape measure is not required.
• Adaptability for Measurements: Vernier calipers can be used for a wide range of applications. It can measure the inside, outside, steps, and depth of any geometrical object.
• Strength: The majority of manufacturers produce Vernier calipers out of pure stainless steel for strength and durability. Because stainless steel has a higher strength rating and corrosion resistance, Vernier Callipers are capable of lasting a lifetime if proper manufacturing standards are followed.
• Price: Vernier calipers are widely used, and there are several providers on the market. As a result, pricing is now highly competitive, and products are easily accessible at low prices.

Ques. What are the disadvantages of a vernier caliper?

Ans. The following are the disadvantages of vernier calliper

• Good vision is needed: The Vernier scale of a Vernier caliper is a very small component. It is extremely difficult to read or distinguish measures with poor vision or an unsuitable angle of vision. To avoid such errors, good vision or a good light with a magnifying glass should be used while obtaining readings.
• Learning a Vernier Caliper: The Vernier scale is a specialized precision measuring tool; before taking measurements, users should make an effort to understand how to read from a Vernier caliper.
• Prospect of errors: While collecting a large number of measurements, the user may make an error. Extra caution is required to avoid the possibility of errors.
• Availability of alternates: Digital calipers are a perfect alternative to Vernier calipers since they produce greater accuracy values with no possibility of error, unlike manual Vernier calipers.

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