# Surveying Questions and Answers – Levelling – Types

This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on “Levelling – Types”.

1. Which type of levelling is done on the phenomenon, the difference in elevation between two points is proportional to the difference in atmospheric pressure at these points?
a) trigonometric levelling
b) spirit levelling
c) barometric levelling
d) profile levelling

Explanation: Barometric levelling make use of the phenomenon that difference in elevation between two points is proportional to the difference in atmospheric pressure at these points.

2. Which of the following is not a method of levelling?
a) Barometric levelling
b) Trigonometric levelling
c) Spirit levelling
d) Traverse levelling

Explanation: Three principal methods are used for determining a difference in elevation, namely, barometric levelling, trigonometric levelling and spirit levelling. Traversing is the type of surveying in which a number of connected survey lines form the framework.

3. Which of the following methods of levelling makes use of the phenomenon that difference in elevation between two points is proportional to the difference in atmospheric pressures at these points?
a) Barometric levelling
b) Trigonometric levelling
c) Spirit levelling
d) Traverse levelling

Explanation: A barometric levelling makes use of the phenomenon that difference in elevation between two points is proportional to the difference in atmospheric pressures at these points. A barometer, therefore, may be used and the readings observed at different points would yield a measure of the relative elevations of those points.

4. At a given point, the atmospheric pressure doesn’t remain constant in the course of the day, even in the course of an hour.
a) True
b) False

Explanation: At a given point, the atmospheric pressure doesn’t remain constant in the course of the day, even in the course of an hour. Therefore, barometric levelling relatively inaccurate.

5. Which process of levelling in which the elevations of points are computed from the vertical angles and horizontal distances measured in the field?
a) Barometric levelling
b) Trigonometric levelling
c) Spirit levelling
d) Traverse levelling

Explanation: Trigonometric levelling is also called indirect levelling. It is the process of levelling in which the elevations of points are computed from the vertical angles and horizontal distances measured in the field.
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6. Which of the following methods of levelling is a modified form of stadia levelling?
a) Barometric levelling
b) Trigonometric levelling
c) Spirit levelling
d) Traversing

Explanation: Trigonometric levelling is the process of levelling in which any triangle can be computed from proper trigonometric relations. In a modified form called stadia levelling.

8. Which branch of surveying is used to find the elevations of given points with respect to given or assumed datum?
a) Levelling
b) Contouring
c) Traversing
d) Plane table surveying

Explanation: Levelling is a branch of surveying is used to find the elevations of given points with respect to given or assumed datum.

9. Determining the relative positions of points on above or beneath the surface of the earth by means of direct or indirect measurements of distance and direction and elevation is called as _________
a) Surveying
b) Levelling
c) Measuring
d) Contouring

Explanation: Surveying is defined as determining the relative positions of points on above or beneath the surface of the earth by means of direct or indirect measurements of distance and direction and elevation.

10. Finding the elevations of a point with respect to a given or assumed and establish points given elevation or at different elevations with respect to given or assumed dactum is ________
a) Surveying
b) Levelling
c) Bearing
d) Contouring

Explanation: Finding the elevations of a point with respect to a given or assumed and establish points given elevation or at different elevations with respect to given or assumed dactum is Levelling.

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