NCEES FS EXAM 2025 NEWEST
QUESTIONS AND DETAILED CORRECT
ANSWERS | A+ GRADE VERIFIED
ANSWERS
The most suitable elevation masks for differential GPS
surveys are
(a) 5° at the base and subordinate station
(b) 10° at the base and subordinate station
(c) 10° at the base and 15° at the subordinate station
(d) 15° at the base and 10° at the subordinate station
Correct Answer (c) 10° at the base and 15° at the
subordinate station to ensure all satellites tracked at the
subordinate stations are also tracked at the base
Compared with single-frequency receivers, dual-frequency
receivers generally are associated with which of the
following?
(a) lower PDOP values
(b) ability to track a greater number of satellites
(c) fewer errors due to atmospheric effect
,(d) fewer ephemeris erros Correct Answer (c) Dual-
frequency receivers generally have fewer errors dur to
atmospheric effects than single-frequency receivers
With a base station data collection interval of 2 seconds,
which of the following would be an acceptable collection
rate for a GPS receiver at a subordinate station?
(a) 1 sec
(b) 3 sec
(c) 4 sec
(d) 5 sec Correct Answer (c) 4 sec
With a base station collecting GPS observations at 2-sec
intervals, the subordinate station should collect at the
same rate, or at an integral multiple of the same rate, to
ensure that observations at the subordinate station are
made at the exact same time that an observation is made
at the base
In an area where the geoid is considerably above the
earth's surface, which of the following is probably true?
(a) the area has a significant deflection of the vertical
(b) the area is mountainous or on a high plateau
,(c) the area is below sea level
(d) the ellipsoid is above the geoid Correct Answer (c) the
area is below sea level
The geoid is the equipotential surface that best fits mean
sea level
Parallels, or lines of latitude, measure the arc distance
(a) east of west of the prime meridian
(b) westward from the prime meridian
(c) northerly and southerly from the equator to the poles
(d) northerly and southerly from the poles to the equator
Correct Answer (c) northerly and southerly from the
equator to the poles
Meridians, or lines of longitude, measure the arc distance
(a) east and west of the prime meridian
(b) westward from the prime meridian
(c) northerly and southerly from the equator to the poles
(d) northerly and southerly from the poles to the equator
Correct Answer (a) east and west of the prime meridian
, Which of the following is used in a Mercator projection?
(a) plane
(b) cone
(c) cylinder
(d) ellipse Correct Answer (c) cylinder
Which of the following is used in a Lambert projection?
(a) plane
(b) cone
(c) cylinder
(d) ellipse Correct Answer (b) cone
Which of the following is used in a Lambert conformal
conic projection?
(a) parallel lines of longitude
(b) two cones
(c) parallel lines of latitude
(d) one cone that slices the earth at two parallels Correct
Answer (d) one cone that slices the earth at two parallels
QUESTIONS AND DETAILED CORRECT
ANSWERS | A+ GRADE VERIFIED
ANSWERS
The most suitable elevation masks for differential GPS
surveys are
(a) 5° at the base and subordinate station
(b) 10° at the base and subordinate station
(c) 10° at the base and 15° at the subordinate station
(d) 15° at the base and 10° at the subordinate station
Correct Answer (c) 10° at the base and 15° at the
subordinate station to ensure all satellites tracked at the
subordinate stations are also tracked at the base
Compared with single-frequency receivers, dual-frequency
receivers generally are associated with which of the
following?
(a) lower PDOP values
(b) ability to track a greater number of satellites
(c) fewer errors due to atmospheric effect
,(d) fewer ephemeris erros Correct Answer (c) Dual-
frequency receivers generally have fewer errors dur to
atmospheric effects than single-frequency receivers
With a base station data collection interval of 2 seconds,
which of the following would be an acceptable collection
rate for a GPS receiver at a subordinate station?
(a) 1 sec
(b) 3 sec
(c) 4 sec
(d) 5 sec Correct Answer (c) 4 sec
With a base station collecting GPS observations at 2-sec
intervals, the subordinate station should collect at the
same rate, or at an integral multiple of the same rate, to
ensure that observations at the subordinate station are
made at the exact same time that an observation is made
at the base
In an area where the geoid is considerably above the
earth's surface, which of the following is probably true?
(a) the area has a significant deflection of the vertical
(b) the area is mountainous or on a high plateau
,(c) the area is below sea level
(d) the ellipsoid is above the geoid Correct Answer (c) the
area is below sea level
The geoid is the equipotential surface that best fits mean
sea level
Parallels, or lines of latitude, measure the arc distance
(a) east of west of the prime meridian
(b) westward from the prime meridian
(c) northerly and southerly from the equator to the poles
(d) northerly and southerly from the poles to the equator
Correct Answer (c) northerly and southerly from the
equator to the poles
Meridians, or lines of longitude, measure the arc distance
(a) east and west of the prime meridian
(b) westward from the prime meridian
(c) northerly and southerly from the equator to the poles
(d) northerly and southerly from the poles to the equator
Correct Answer (a) east and west of the prime meridian
, Which of the following is used in a Mercator projection?
(a) plane
(b) cone
(c) cylinder
(d) ellipse Correct Answer (c) cylinder
Which of the following is used in a Lambert projection?
(a) plane
(b) cone
(c) cylinder
(d) ellipse Correct Answer (b) cone
Which of the following is used in a Lambert conformal
conic projection?
(a) parallel lines of longitude
(b) two cones
(c) parallel lines of latitude
(d) one cone that slices the earth at two parallels Correct
Answer (d) one cone that slices the earth at two parallels
