FS Route and Transportation Surveys 2

Question 1

A parabolic vertical curve is preferred over a circular vertical curve in route surveying primarily because:

Accepted Answer

It provides a constant rate of change of grade

Answer

It minimizes earthwork volumes on grades

Answer

It is easier to stake in the field than a circular curve

Answer

It provides the maximum achievable stopping sight distance

Question 2

The prismoidal formula for computing earthwork volumes between two cross-sections is:

Accepted Answer

V = L × (A1 + 4Am + A2) / 6

Answer

V = L × (A1 + A2) / 3

Answer

V = L × (A1 + A2) / 2

Answer

V = L × √(A1 × A2)

Question 3

In earthwork terminology, 'swell' refers to:

Accepted Answer

The increase in volume when in-situ material is excavated and loosened

Answer

The rate of grade change on a vertical curve

Answer

The settlement of fill material under load over time

Answer

The horizontal spreading of fill material beyond the design slope

Question 4

The K-value for a parabolic vertical curve is defined as:

Accepted Answer

The length of curve (L) divided by the algebraic difference in grades (A)

Answer

The maximum elevation difference between BVC and EVC

Answer

The rate of grade change per 100-foot station

Answer

The ratio of vertical rise to horizontal distance

Question 5

A crest vertical curve is used when:

Accepted Answer

A positive grade is followed by a negative or less steep positive grade

Answer

A negative grade is followed by a positive or less steep negative grade

Answer

Two grades of equal magnitude are connected

Answer

The alignment transitions from flat terrain to a steep hill

Question 6

In earthwork volume computations, which method provides greater accuracy when cross-section areas change significantly between stations?

Accepted Answer

Prismoidal formula

Answer

Average end area method

Answer

Trapezoidal approximation method

Answer

Unit weight conversion method

Question 7

A mass diagram in highway design is primarily used to:

Accepted Answer

Determine the most economical direction and distance to haul excavated material

Answer

Show the elevation profile of the vertical alignment

Answer

Calculate the total weight of earthwork material

Answer

Plot horizontal curve locations along the alignment