Which of the following are the examples of cumulative errors in chaining? i. Chain is shorter than the designated length ii. sag of a chain iii. variation in pull
- AOnly (i)
- B(i) and (ii)Correct
- C(ii) and (iii)
- D(i), (ii) and (iii)
Solution
Concept
Cumulative and compensating errors
Step-by-step solution
1. A chain that is too short or sag in the chain always acts in the same sense, so these errors accumulate (positive/negative cumulative). 2. Variation in pull is random and tends to compensate.
Explanation
Systematic errors accumulate; random ones compensate.
Why the other options are wrong
Options with (iii) include a compensating error.
Shortcut
Length error and sag → cumulative.
Correct answer: B) (i) and (ii)