Vernier Calipers Questions and Answers for Viva

Answer-1: It is simple instrument by which length of an object can be measured accurately up to one-tenth of a millimeter or one-hundredth of a centimeter.

Answer-2: A French mathematician named Pierre Vernier invented it and it is named after him.

Answer-3: A scale cannot measure objects which are smaller than 1mm but a vernier caliper can measure objects up to 1mm. As already known the vernier caliper has two scales: the main scale and the vernier scale together this arrangement is used to measure very small lengths like 0.1mm.

Answer-4: Least count is the smallest length that can be measured with the instrument and it is equal to the difference between a main scale division and a vernier scale division. L.C. of vernier scale = 0.01 cm or 0.1 mm.

Answer-5: Vernier scale does not own any unit.

Answer-6: Least count of vernier scale is determined by using the relation: L.C. = (Smallest division on Main Scale ) / (Total number of divisions on Vernier Scale)

Answer-7: The sliding scale along the main scale is called vernier scale.

Answer-8: The various parts of vernier caliper are: Main scale or beam, Fixed jaw, Movable jaw, Vernier scale, Fine adjusting unit, Locking screws, Fine adjusting screw, Inner measuring nibs, Depth gauge.

Answer-9: The accuracy will increase since the L.C. will decrease i.e. Accuracy = 1 / Least count.

Answer-10: The error which arises when zeros of M.S. and V.S. do not coincide upon joining the two jaws.

Answer-11: The Z.E. is positive when the zero of V.S. is to the right of the zero of M.S.

Answer-12: Corrected reading = Meaning reading ? ( + Z.E.)

Answer-13: Verniew caliper is commonly used in microscopes, telescopes, sextant, polarimeter, etc.

Answer-14: It can measure accurately up to 10^-3 cm.

Answer-15: Vernier calipers.

Answer-16: Vernier reading is the smallest measurable distance captured by a Vernier caliper. It is also termed as "Resolution" of the Vernier caliper. Imperial Vernier calipers have a resolution of 0.001 inches. The resolution of metric Vernier calipers varies from 0.02mm to 0.05mm. The resolution is normally indicated at the end of the Vernier scale.

Answer-17: The least count of vernier caliper is 0.01cm.

Answer-18: It is used to measure the inner diameter of a solid sphere, outer diameter of a solid sphere and the depth of a cylinder.

Answer-19: A vernier scale slides on a strip. It can be fixed on any position by the retainer. On the vernier scale, generally 0.9 cm is divided into ten equal parts.