Question Bank • QB_SWCE_EXP_064 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Surveying and Levelling

Subtopic: Types of levelling

Question Statement:

In differential levelling, the backsight reading on a permanent benchmark of reduced level $RL = 150.000\text{ m}$ is $1.850\text{ m}$. The foresight reading on a forward station $A$ is $1.250\text{ m}$. Calculate the reduced level of station $A$ in $\text{meters}$.

Answer Key:

150.6

Step-by-Step Solution & Explanation

Height of Instrument ($HI$): $HI = RL_{\text{BM}} + BS = 150.000 + 1.850 = 151.850\text{ m}$ Reduced level of station $A$: $RL_A = HI - FS = 151.850 - 1.250 = 150.600\text{ m}$
← Previous (QB_SWCE_EXP_053) Next (QB_SWCE_ADV_135) →

Practice In Authentic CBT Exam Interface

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

Launch CBT Mock Test