search
arrow-left Previous
Next arrow-right
Q: With passage of time, which of the following scales will NOT give accurate results due to shrinkage of the sheet or the paper? i. Plane scale ii. Engineer’s scale iii. Representative fraction iv. Diagonal scale
  • A. ii, iii and iv
  • B. ii and iii
  • C. i, ii and iii
  • D. i and iv
Correct Answer: Option B - With passage of time, plane and diagonal scale give accurate results due to shrinkage of the sheet or the paper. Plane scale–Is used to measure up to two consecutive units, i.e. a unit and its immediate sub-division. For example (a) Metre and decimetre (b) Kilometre and hectometre (c) Feet and inches etc. Diagonal scale–Is used to represent three consecutive units i.e. a unit and its immediate two sub-division. For example (a) Metre, decimetre and centimetre (b) Yards, Feet and inches etc. Note–Engineer's scale and representative fraction will not give accurate results due to shrinkage of the paper.
B. With passage of time, plane and diagonal scale give accurate results due to shrinkage of the sheet or the paper. Plane scale–Is used to measure up to two consecutive units, i.e. a unit and its immediate sub-division. For example (a) Metre and decimetre (b) Kilometre and hectometre (c) Feet and inches etc. Diagonal scale–Is used to represent three consecutive units i.e. a unit and its immediate two sub-division. For example (a) Metre, decimetre and centimetre (b) Yards, Feet and inches etc. Note–Engineer's scale and representative fraction will not give accurate results due to shrinkage of the paper.

Explanations:

With passage of time, plane and diagonal scale give accurate results due to shrinkage of the sheet or the paper. Plane scale–Is used to measure up to two consecutive units, i.e. a unit and its immediate sub-division. For example (a) Metre and decimetre (b) Kilometre and hectometre (c) Feet and inches etc. Diagonal scale–Is used to represent three consecutive units i.e. a unit and its immediate two sub-division. For example (a) Metre, decimetre and centimetre (b) Yards, Feet and inches etc. Note–Engineer's scale and representative fraction will not give accurate results due to shrinkage of the paper.