CEP Field Survey & Data Collection 2

Question 1

Which GPS error source is most effectively reduced by using Differential GPS (DGPS) correction?

Accepted Answer

Selective availability and atmospheric delay

Answer

DGPS uses a fixed base station with a known position to calculate and broadcast corrections that remove common-mode errors like atmospheric delay and, historically, selective availability.

Question 2

When conducting a wetland delineation field survey, which three-parameter approach is required under the 1987 U.S. Army Corps of Engineers Wetland Delineation Manual?

Accepted Answer

Hydrology, hydric soils, and hydrophytic vegetation

Answer

The 1987 Corps manual requires positive evidence of hydrology, hydric soils, and hydrophytic vegetation for an area to be classified as a jurisdictional wetland.

Question 3

A surveyor uses a Munsell color chart in the field primarily to:

Accepted Answer

Describe soil color for profile documentation

Answer

The Munsell system standardizes soil color descriptions using hue, value, and chroma notation, enabling consistent comparison across surveys.

Question 4

Which sampling design best ensures every location in a study area has an equal probability of being selected?

Accepted Answer

Simple random sampling

Answer

Simple random sampling assigns equal selection probability to all possible sample units, supporting unbiased statistical inference across the study area.

Question 5

Total dissolved solids (TDS) in a water sample are most accurately measured by:

Accepted Answer

Gravimetric filtration and evaporation

Answer

Gravimetric analysis filters a known water volume, evaporates it, and weighs the residue to obtain TDS in mg/L per Standard Methods.

(CEP) Certified Environmental Planner Practice Test

(CEP) Certified Environmental Planner Practice Test

CEP Field Survey & Data Collection 2