Exam

Question 1

What is the main purpose of leveling in surveying?

Answer 1

Determine height differences

Question 2

What is a benchmark (BM)?

Answer 2

A point with a known elevation

Question 3

Which leveling method uses atmospheric pressure?

Answer 3

Barometric leveling

Question 4

Which method is most precise for measuring elevation?

Answer 4

Spirit leveling

Question 5

What instrument is commonly used in spirit leveling?

Answer 5

Telescope with bubble

Question 6

What does a backsight (BS) reading represent?

Answer 6

Vertical distance from known point

Question 7

The last reading taken before moving the instrument is called?

Answer 7

Foresight

Question 8

What is the horizontal line through the center of the telescope called?

Answer 8

Line of collimation

Question 9

What does MSL stand for in leveling?

Answer 9

Mean Sea Level

Question 10

What is an intermediate sight used for?

Answer 10

Reading in between BS and FS

Question 11

A vertical line represents?

Answer 11

Direction of gravity

Question 12

What is used as the zero reference point in most leveling surveys?

Answer 12

Mean Sea Level

Question 13

The reduce level (RL) is?

Answer 13

Height above/below the datum

Question 14

Which formula represents rise or fall method?

Answer 14

Rise or Fall = BS - FS

Question 15

What is the general formula to compute HI (Height of Instrument)?

Answer 15

HI = RL + BS

Question 16

The formula for computing reduce level in height of collimation method is?

Answer 16

RL = HI - FS

Question 17

In the rise and fall method, which check ensures correctness?

Answer 17

ΣBS - ΣFS = Last RL - First RL

Question 18

Which term refers to the shape of land in a vertical plane?

Answer 18

Profile

Question 19

The ratio of ground distance to map distance is called?

Answer 19

Scale

Question 20

Which symbol represents a point elevation without ground marking?

Answer 20

Spot height

Question 21

What do contour lines connect?

Answer 21

Points of equal height

Question 22

Which section is taken along the centerline?

Answer 22

Longitudinal section

Question 23

Cross-sections help with all except?

Answer 23

Angular measurement

Question 24

What is the formation level?

Answer 24

Final level for excavation/deposit

Question 25

Inverted level refers to?

Answer 25

Bottom of a pipe or excavation

Question 26

What is called when the ground level is below the design formation?

Answer 26

Cutting

Question 27

An embankment is used when?

Answer 27

Ground level is lower than design level

Question 28

The slope in the design plan is called?

Answer 28

Design gradient

Question 29

What does batter gradient refer to?

Answer 29

Side slope

Question 30

What does the surface gradient (k) refer to?

Answer 30

Actual ground slope

Question 31

Chainage is the?

Answer 31

Linear distance from a reference point

Question 32

A digital elevation model includes?

Answer 32

Ground and surface features

Question 33

What does a digital terrain model represent?

Answer 33

Bare earth surface only

Question 34

Which is NOT a function of cross-section data?

Answer 34

Spirit leveling

Question 35

Which reading is always taken first in leveling?

Answer 35

Backsight

Question 36

Line of sight in spirit leveling must be?

Answer 36

Horizontal

Question 37

What is used to ensure the telescope is level?

Answer 37

Bubble tube

Question 38

Elevation values above MSL are considered?

Answer 38

Positive

Question 39

Which leveling method uses a theodolite?

Answer 39

Trigonometrical leveling

Question 40

Which method involves angular measurement and horizontal distance?

Answer 40

Trigonometrical leveling

Question 41

What does 'datum' refer to in leveling?

Answer 41

Reference surface for elevations

Question 42

Which type of benchmark is created by government agencies?

Answer 42

Permanent benchmark

Question 43

What do you call the curved line equidistant from the earth’s center?

Answer 43

Datum line

Question 44

What type of line is normal to gravity?

Answer 44

Vertical line

Question 45

In the height of collimation method, what value is subtracted from HI to get RL?

Answer 45

FS or IS

Question 46

A typical contour interval is?

Answer 46

Constant

Question 47

What is a good check for height of collimation method accuracy?

Answer 47

(ΣIS + ΣRL)/n = HI

Question 48

What kind of elevation uses decimal points and dots?

Answer 48

Spot height

Question 49

The elevation difference between two points is computed using?

Answer 49

BS and FS

Question 50

If elevation is being transferred through multiple setups, what method is used?

Answer 50

Differential leveling