PlacementPrepThe fundamental principle of surveying is to work from:
Solution
This prevents errors from building up.
Answer: (C) Whole to part
Technical · Civil Engineering
Surveying MCQs for placement tests
20 technical questions of moderate difficulty, as asked in campus placement and company tests. Each has a short explanation.
The length of a standard metric chain (20 m) has how many links?
Solution
Each link is 0.2 m.
Answer: (D) 100
Which instrument is used to measure horizontal and vertical angles precisely?
Solution
A theodolite measures both types of angles.
Answer: (C) Theodolite
Levelling is used to find:
Solution
It determines differences in elevation.
Answer: (A) Relative heights (elevations) of points
The first reading taken on a point of known elevation after setting up a level is:
Solution
Back sight is taken on a benchmark or a known point.
Answer: (D) Back sight
If the back sight on a benchmark of RL 100.000 m is 1.500 m, the height of instrument is:
Solution
HI = RL + BS = 100.000 + 1.500.
Answer: (C) 101.500 m
With height of instrument 101.500 m and a fore sight of 2.250 m, the reduced level of the point is:
Solution
RL = HI − FS = 101.500 − 2.250.
Answer: (C) 99.250 m
A line joining points of equal elevation on a map is a:
Solution
Contours show the shape of the ground.
Answer: (D) Contour line
Closely spaced contour lines indicate:
Solution
The ground rises quickly over a short distance.
Answer: (C) A steep slope
The whole-circle bearing of a line is measured from:
Solution
The last option describes the quadrantal (reduced) bearing.
Answer: (A) North, clockwise from 0° to 360°
The back bearing of a line with fore bearing 60° is:
Solution
Back bearing = fore bearing ± 180°.
Answer: (C) 240°
Local attraction in compass surveying is caused by:
Solution
Iron objects or electric cables disturb the needle.
Answer: (A) Nearby magnetic materials
Plane table surveying is mainly a:
Solution
The map is drawn on site.
Answer: (C) Graphical method where plotting is done in the field
Total station combines:
Solution
It measures angles and distances electronically.
Answer: (B) An electronic theodolite and an electronic distance meter
The error due to the curvature of the earth makes objects appear:
Solution
Curvature correction is subtracted.
Answer: (D) Lower than they are
Ranging in chain surveying means:
Solution
Ranging rods keep the chain in a straight line.
Answer: (B) Fixing intermediate points on a straight line
GPS determines position using signals from:
Solution
Receivers use timing signals from several satellites.
Answer: (D) Satellites
In a closed traverse, the sum of interior angles of an n-sided polygon is:
Solution
(2n − 4) right angles = (n − 2) × 180°.
Answer: (B) (2n − 4) × 90°
A benchmark is:
Solution
Benchmarks are used as references in levelling.
Answer: (D) A point of known elevation
The process of turning the telescope of a theodolite through 180° about its horizontal axis is called:
Solution
Also called plunging; it reverses the telescope's direction.
Answer: (C) Transiting
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