FUNDAMENTAL SURVEYING Horizontal and Vertical Curves 2

Question 1

Using the chord definition, the degree of curve (Dc) is the central angle subtended by a chord of:

Accepted Answer

100 feet

Answer

50 feet

Answer

200 feet

Answer

300 feet

Question 2

A reverse curve is characterized by:

Accepted Answer

Two simple curves joined at a point where they turn in opposite directions

Answer

Two curves of different radii turning in the same direction

Answer

A curve with a uniformly increasing radius

Answer

Two curves of identical radii turning in the same direction

Question 3

The long chord (C) of a simple horizontal curve connecting PC to PT is given by:

Accepted Answer

C = 2R × sin(Δ/2)

Answer

C = R × sin(Δ)

Answer

C = 2R × tan(Δ/2)

Answer

C = R × (1 − cos(Δ/2))

Question 4

A spiral (transition) curve inserted between a straight tangent and a circular curve primarily serves to:

Accepted Answer

Provide a gradual change in centrifugal force and allow smooth superelevation runoff

Answer

Increase the degree of curve abruptly at the PC

Answer

Shorten the total alignment length between two control points

Answer

Eliminate the need for superelevation on the circular curve

Question 5

Using the arc definition, what is the radius of a 2-degree curve?

Accepted Answer

2,864.8 feet

Answer

1,000.0 feet

Answer

5,729.6 feet

Answer

573.0 feet

Question 6

Superelevation on a horizontal curve is designed primarily to:

Accepted Answer

Counteract the centrifugal force acting on vehicles navigating the curve

Answer

Improve cross-slope drainage away from the roadway centerline

Answer

Allow higher posted speed limits on curved sections

Answer

Reduce the required pavement structural thickness on curves

Question 7

When staking a horizontal curve using the deflection angle method, the deflection angle from the PC to any point on the curve equals:

Accepted Answer

Half the central angle subtended by the arc from PC to that point

Answer

The full central angle subtended to that point

Answer

The intersection angle divided by the total number of stations

Answer

The bearing angle from the PC to the given point