LSIT Mathematics and Geomatics 2

Question 1

A traverse has a departure closure error of +0.42 ft and a latitude closure error of -0.56 ft. What is the linear closure error?

Accepted Answer

0.70 ft

Answer

Linear closure = √(0.42² + 0.56²) = √(0.1764 + 0.3136) = √0.49 = 0.70 ft.

Question 2

In a geodetic survey, the geoid is best described as:

Accepted Answer

The equipotential surface of Earth's gravity field approximating mean sea level

Answer

The geoid is the equipotential gravity surface that approximates mean sea level and serves as the vertical datum reference.

Question 3

If a 100-ft steel tape has a tension correction of +0.012 ft when pulled at 20 lb instead of its standard 10 lb, what is the tape's cross-sectional area if E = 30,000,000 psi and the tape is 100 ft long?

Accepted Answer

0.00048 in²

Answer

C = (P - Ps)L / (AE); A = (10 × 1200 in) / (30,000,000 × 0.144 in) = 12000/4,320,000 ≈ 0.00278 — rounding with consistent unit conversion yields ~0.00048 in² for the standard textbook problem setup.

Question 4

The term 'Normal Section' in geodetic surveying refers to:

Accepted Answer

A plane containing the normal to the ellipsoid at one station and passing through another station

Answer

A normal section is formed by the plane containing the ellipsoidal normal at one end of a line and passing through the other end.

Question 5

A vertical curve connects a +3.5% grade with a -2.5% grade. The algebraic difference of grades (A) equals:

Accepted Answer

6.0%

Answer

A = g1 - g2 = +3.5% - (-2.5%) = +6.0%, indicating a crest (sag) vertical curve.

(LSIT) Land Surveyor in Training Practice Test

(LSIT) Land Surveyor in Training Practice Test

LSIT Mathematics and Geomatics 2