Question

Given below are two statements. Statement-I: The vertical height of a point above or below a reference datum is referred to as the reduced level. Statement-II: Reduced levels cannot be used to produce the ground contours on a plan. The correct answer is

• A. Only statement-I is correct
• B. Only statement-II is correct
• C. Both statement-I and statement-II are correct
• D. Both statement-I and statement-II are incorrect

Hint:

The reduced level (RL) is the height of a point measured vertically above or below a fixed reference surface called the datum. Contours are lines joining points of equal RL.

Answer 1

The Correct Option is A

Concept:
The reduced level (RL) is the height of a point measured vertically above or below a fixed reference surface called the datum. Contours are lines joining points of equal RL.

Step 1:
Statement-I correctly defines the reduced level as the vertical height of a point above or below a reference datum. So Statement-I is true.

Step 2:
Statement-II says reduced levels cannot be used to draw ground contours. This is false, because contours are actually plotted by joining points of equal reduced level. So Statement-II is incorrect.

Answer: Option (1) — Only statement-I is correct.