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Q: ...... is a short auxiliary scale constructed along the plain or main scale, which can be read up to two decimal places.
  • A. Plain scale
  • B. Diagonal scale
  • C. Vernier scale
  • D. Ratio scale
Correct Answer: Option C - Vernier scales– • Similar to diagonal scale, vernier scale is used for measuring up to second decimal. • A vernier scale consists of (i) a primary scale and (ii) vernier • The primary scale is a plain scale fully divided in to minor divisions, subdivisions on main scale is called main scale divisions. • The graduations on the vernier are derived from those on the primary scale. Subdivision-vernier scale division (VSD).
C. Vernier scales– • Similar to diagonal scale, vernier scale is used for measuring up to second decimal. • A vernier scale consists of (i) a primary scale and (ii) vernier • The primary scale is a plain scale fully divided in to minor divisions, subdivisions on main scale is called main scale divisions. • The graduations on the vernier are derived from those on the primary scale. Subdivision-vernier scale division (VSD).

Explanations:

Vernier scales– • Similar to diagonal scale, vernier scale is used for measuring up to second decimal. • A vernier scale consists of (i) a primary scale and (ii) vernier • The primary scale is a plain scale fully divided in to minor divisions, subdivisions on main scale is called main scale divisions. • The graduations on the vernier are derived from those on the primary scale. Subdivision-vernier scale division (VSD).