12.

Which of the following is assumed when determining the geodetic datum by a single

astronomical point and one astronomical azimuth method?

A.

The ellipsoid and geoid are congruent

B.

The normal to the ellipsoid and the normal to the geoid are not in coincidence

C.

The ellipsoid and geoid have the maximum geoidal separation

D.

The perpendicular to the ellipsoid and the plumb line coincide.

13.

The meridional component of the deflection of the vertical is the same as the difference between

the ________________________________________________________________________________.

A.

Geodetic and astronomic latitude

B.

Geodetic and astronomic longitude

C.

Geodetic and astronomic azimuth

D.

Theoretical and observed gravity

14.

The Laplace equation is used to determine __________________________________________.

A.

The accuracy of observed geodetic and astronomic data

B.

A Laplace station

C.

The theoretical gravity at the point of origin

D.

Gravity anomalies at the point of origin

15.

What is one weakness in the preferred datums in use today?

A.

Too few connections provide weak ties

B.

There is only one absolute datum in use

C.

All of the datums are relative

D.

All of the datums are absolute and the Tokyo datum is relative