Civil Engineering PE Surveying and Geomatics 3

Question 1

Two cross-sections 100 ft apart have areas of 120 sq ft and 180 sq ft. Using the average end area method, what is the earthwork volume in cubic yards?

Accepted Answer

555.6 cy

Answer

V = ((A₁ + A₂)/2) × L = 150 × 100 = 15,000 cu ft; 15,000 ÷ 27 = 555.6 cy.

Question 2

A photogrammetric map has a scale of 1:20,000. A distance measured on the map is 3.5 cm. What is the actual ground distance?

Accepted Answer

700 m

Answer

Ground distance = 3.5 cm × 20,000 = 70,000 cm = 700 m.

Question 3

If D = A + B where A = 100.00 ± 0.02 ft and B = 200.00 ± 0.03 ft (independent measurements), what is the propagated error in D?

Accepted Answer

± 0.036 ft

Answer

Error in sum = √(eA² + eB²) = √(0.02² + 0.03²) = √(0.0013) ≈ 0.036 ft.

Question 4

What is the primary purpose of a control survey in an engineering project?

Accepted Answer

To establish a reference framework of accurate points for all subsequent surveys

Answer

Control surveys establish horizontal and vertical reference monuments that all project surveys are tied to, ensuring consistency across the entire project.

Question 5

A traverse line runs from Point A (N 100.0, E 200.0) to Point B (N 240.0, E 350.0). What is the bearing of line AB?

Accepted Answer

N 47°00' E

Answer

Bearing = N arctan(ΔE/ΔN) E = N arctan(150/140) = N arctan(1.071) ≈ N 47°00' E.

Civil Engineering PE Practice Test

Civil Engineering PE Practice Test

Civil Engineering PE Surveying and Geomatics 3