Question Bank • QB_SWCE_ADV_143 NAT • 1 Mark

Section 4: Soil and Water Conservation Engineering

Surveying and Levelling

Subtopic: Chain surveying, methods of traversing

Question Statement:

A farm boundary line measured with a nominal $20.0\text{ m}$ metric chain was recorded as $250.0\text{ m}$. Subsequent laboratory calibration revealed that the chain was $0.10\text{ m}$ too long ($L' = 20.10\text{ m}$). The true length of the surveyed boundary line in meters is ________ (round off to two decimal places).

Answer Key:

251.25

Step-by-Step Solution & Explanation

1. True length relation: $\text{True Length} = \text{Measured Length} \times \left( \frac{L'}{L} \right)$ Where: - Measured Length $= 250.0\text{ m}$ - Actual chain length $L' = 20.10\text{ m}$ - Nominal chain length $L = 20.00\text{ m}$ $\text{True Length} = 250.0 \times \frac{20.10}{20.00} = 250.0 \times 1.005 = 251.25\text{ m}$
← Previous (QB_SWCE_ADV_134) Next (QB_SWCE_SUR_010) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test