Question

what are the two types of zero error
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Answer 1

Answer:

There are two types of zero errors – negative error and positive error. (i) Positive Error: When the two jaws are in contact and the zero of the vernier lies right to the zero of the main scale, the error is positive and the zero correction is negative.

Answer 2

Answer:

Zero error occurs when the 0 division on vernier scaledoes not coincide with that of the main scale.There are two types of zero error in a vernier caliper: Positive and Negative.

Explanation:

positive Zero Error occurs when the 0 mark on the vernier scale is on the right of the 0 mark on the main scale when the two jaws are brought together.

negative Zero Error occurs when the 0 mark on the vernier scale is on the left of the 0 mark on the main scale when the two jaws are brought together.