FREE NCEES MCQ Surveying Questions and Answers

Question 1

The difference between steps when measuring downhill to get more precise results is?

Accepted Answer

Decreases with increase of slope

Answer

When measuring downhill to achieve more precise results, the length of each individual horizontal step or segment measured decreases as the slope increases. On steeper slopes, shorter horizontal measurements are taken to minimize errors caused by tape sag and to ensure the tape is held level. This reduction in the length of each step (the 'difference between steps') enhances the overall precision of the measurement.

Question 2

A traverse leg's orthographical projection onto the reference meridian is referred to as

Accepted Answer

Latitude to the leg

Answer

In surveying, the orthographical projection of a traverse leg onto the reference meridian (the North-South line) is defined as the latitude of that leg. Latitude represents the change in the North-South coordinate from the beginning to the end of that specific traverse segment. Conversely, the projection onto the reference parallel (East-West line) is called the departure.

Question 3

The flaw in a lens that causes white light rays to split into their constituent parts and go to multiple foci, creating a distorted and colored image is known as

Accepted Answer

Chromatic aberration

Answer

Chromatic aberration is a common lens flaw where different wavelengths of white light (colors) are refracted at slightly different angles, causing them to focus at varying points along the optical axis. This phenomenon results in a blurred image with noticeable color fringes around objects, as the lens cannot bring all colors to a single, sharp focal point.

Question 4

A theodolite is when

Accepted Answer

All the above

Answer

A theodolite is a precision optical instrument used in surveying to measure horizontal and vertical angles. For accurate operation, it requires specific geometric relationships between its axes. These include the telescope axis being perpendicular to the transit axis, the axis of rotation being perpendicular to the transit axis, and ideally, all three axes (telescope, transit, and rotation) intersecting at the instrument's center. All these conditions are essential for proper functionality.

Question 5

Random errors have a tendency to mount in proportion to

Accepted Answer

Square root of the number of operation involved

Answer

Random errors, which are unpredictable and fluctuate in magnitude and direction, tend to accumulate in proportion to the square root of the number of operations or measurements involved. This statistical principle is fundamental in error analysis, indicating that while individual random errors may partially cancel out, their cumulative effect grows, albeit at a slower rate than the direct number of operations.

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FREE NCEES MCQ Surveying Questions and Answers