631. For the construction of highway (or railway)
A. longitudinal sections are required
B. cross sections are required
C. both longitudinal and cross sections are required
D. none of these.

632. An imaginary line joining the points of equal elevation on the surface of the earth, represents
A. contour surface
B. contour gradient
C. contour line
D. level line

633. The boundary of water of a still lake, represents
A. level surface
B. horizontal surface
C. contour line
D. a concave surface.

634. The constant vertical distance between two adjacent contours, is called
A. horizontal interval
B. horizontal equivalent
C. vertical equivalent
D. contour interval

635. The contour interval is kept inversely proportional to
A. time and expense of field work
B. steepness of the configuration of the area
C. scale of the map
D. all the above.

636. The meridian of a place is
A. a great circle passing through the place and the poles
B. a great circle whose plane is perpendicular to the axis of rotation and it also passes through the place
C. a semi-circle which passes through the place and is terminated at the poles
D. an arc of the great circle which passes through the place and is perpendicular to the equator.

637. Latitude of a place is the angular distance from
A. Greenwich to the place
B. equator to the poles
C. equator to the nearer pole
D. none of these.

638. Longitude of a place is the angular distance between the meridian of the place and
A. the standard meridian
B. the international date line
C. that of Greenwich
D. both (a) and (c) of above.

639. Longitudes are measured from 0? to
A. 180? eastward
B. 1800 westward
C. 180? east or westward
D. 360? Eastward

640. International date line is located along
A. standard meridian sin (a + b)
B. Greenwich meridian
C. equator
D. 180? Longitude

NOTE
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