LSIT EXAM REVIEW; QUESTIONS
WITH DETAILED VERIFIED
ANSWERS; ALREADY GRADED A
(i) mathematics, (ii) legal principles, (iii) types of surveys and (iv)
survey computations - correct answer- Know these forsure
A close - correct answer- is the difference between the
starting level of the initial point for the outward run (is from
known to unknown points) and that determined at the end of
the return run (is the check leveling in the opposite direction).
-If the levels have been reduced correctly this value should be
the same as the difference between the sum of the rises and
falls and also the difference between the sum of the backsight
and foresights.
A GPS signal travel time is 67ms from the receiver to the
satellite, the approximate distance (mile) is most nearly: -
correct answer- Solution: Speed of light in atmosphere in
186,000-mi/sec, Therefore, distance = velocity x time
,186,000mi/sec x 0.067sec = 12,462-mi
A horizontal line is one that is: - correct answer-
perpendicular to the direction of gravity at a point.
A level datum - correct answer- is an arbitrary (random
choice, no reason behind it) level surface to which elevations are
referred.
-Example the most common surveying datum is mean sea-level
(MSL),
A level surface - correct answer- is a surface which is
everywhere perpendicular to the direction of the force of
gravity.
-An example is the surface of a completely still lake.
-For ordinary leveling, level surfaces at different
elevations can be considered to be parallel.
,A reduced level - correct answer- is the vertical distance
between a survey point and the adopted level datum.
-A bench mark (BM) is the term given to a definite, permanent
accessible point of known height above a
datum to which the height of other points can be referred.
A run - correct answer- is the leveling between two or more
points measured in one direction only. (think of slope rise over
run)
-The outward run is from known to unknown points and the
return run is the check leveling in the opposite direction.
A set-up - correct answer- refers the position of a level or
other instrument at the time in which a number of observations
are made without mooring (keeping where it is, able to move
instrument) the instrument.
-The first observation is made to the known point and is
termed a backsight; the last observation is to the final point or
the next to be measured on the run, and
all other points are intermediates.
, As-built Survey - correct answer- an As-Built Survey is a
survey to physically locate
structures and improvements on a parcel of land, generally for
mortgage purposes. This does not always include boundary
monumentation.
Astronomic azimuth is based on: - correct answer- True
north
Azimuth - correct answer- Azimuths are horizontal angles
observed clockwise from any reference meridian. Azimuths are
generally observed from north. Start from North 0 and go
clockwise to desired ri
Vary from 0 - 360
Backsight (BS) - correct answer- reading taken on a rod held
on a point of known or
assumed elevation. First rod reading taken after the instrument
has been set up and leveled.
WITH DETAILED VERIFIED
ANSWERS; ALREADY GRADED A
(i) mathematics, (ii) legal principles, (iii) types of surveys and (iv)
survey computations - correct answer- Know these forsure
A close - correct answer- is the difference between the
starting level of the initial point for the outward run (is from
known to unknown points) and that determined at the end of
the return run (is the check leveling in the opposite direction).
-If the levels have been reduced correctly this value should be
the same as the difference between the sum of the rises and
falls and also the difference between the sum of the backsight
and foresights.
A GPS signal travel time is 67ms from the receiver to the
satellite, the approximate distance (mile) is most nearly: -
correct answer- Solution: Speed of light in atmosphere in
186,000-mi/sec, Therefore, distance = velocity x time
,186,000mi/sec x 0.067sec = 12,462-mi
A horizontal line is one that is: - correct answer-
perpendicular to the direction of gravity at a point.
A level datum - correct answer- is an arbitrary (random
choice, no reason behind it) level surface to which elevations are
referred.
-Example the most common surveying datum is mean sea-level
(MSL),
A level surface - correct answer- is a surface which is
everywhere perpendicular to the direction of the force of
gravity.
-An example is the surface of a completely still lake.
-For ordinary leveling, level surfaces at different
elevations can be considered to be parallel.
,A reduced level - correct answer- is the vertical distance
between a survey point and the adopted level datum.
-A bench mark (BM) is the term given to a definite, permanent
accessible point of known height above a
datum to which the height of other points can be referred.
A run - correct answer- is the leveling between two or more
points measured in one direction only. (think of slope rise over
run)
-The outward run is from known to unknown points and the
return run is the check leveling in the opposite direction.
A set-up - correct answer- refers the position of a level or
other instrument at the time in which a number of observations
are made without mooring (keeping where it is, able to move
instrument) the instrument.
-The first observation is made to the known point and is
termed a backsight; the last observation is to the final point or
the next to be measured on the run, and
all other points are intermediates.
, As-built Survey - correct answer- an As-Built Survey is a
survey to physically locate
structures and improvements on a parcel of land, generally for
mortgage purposes. This does not always include boundary
monumentation.
Astronomic azimuth is based on: - correct answer- True
north
Azimuth - correct answer- Azimuths are horizontal angles
observed clockwise from any reference meridian. Azimuths are
generally observed from north. Start from North 0 and go
clockwise to desired ri
Vary from 0 - 360
Backsight (BS) - correct answer- reading taken on a rod held
on a point of known or
assumed elevation. First rod reading taken after the instrument
has been set up and leveled.
