1. To locate the contour gradient, the level is set at a commanding position and reading on the staff at the second point is taken.
a) true
b) false
Explanation: To locate the contour gradient, the level is set at a commanding position and reading on the staff at the first point is taken.
2. From a single instrument station, several points at a given gradient can be located.
a) true
b) false
Explanation: To locate the contour gradient, the level is set at a commanding position and reading on the staff at the first point is taken. From a single instrument station, several points at a given gradient can be located.
3. In a direct method, the contour to be plotted is actually traced on the ground.
a) true
b) false
Explanation: In a direct method, the contour to be plotted is actually traced on the ground. Only those points are surveyed which happen to be plotted.
4. In indirect method, each contour is located by determining the positions of a series of points through which the contour passes.
a) true
b) false
Explanation: In indirect method, each contour is located by determining the positions of series of points through which the contour passes. The operation is also sometimes called tracing out contours.
5. The indirect method, guide points need not necessarily be on the contours.
a) true
b) false
Explanation: In indirect method, some suitable guide points are selected and surveyed. The guide points need not necessarily be on the contours.
6. The indirect method serves as a basis for the interpolation of contours.
a) true
b) false
Explanation: In indirect method, some suitable guide points are selected and surveyed. These guide points, having been plotted, serve as a basis for the interpolation of contours.
7. ______ is the most precise instrument designed for the measurement of horizontal and vertical angles.
a) Survey chain
b) Dumpy level
c) Theodolite
d) Telescope
Explanation: Theodolite is the most precise instrument designed for the measurement of horizontal and vertical angles. It has wide applicability in surveying such as laying off horizontal angles, locating points on line, prolonging survey lines, establishing grades etc.
8. Which of the following cannot be done with the help of theodolite in surveying?
a) Laying off horizontal angles
b) Locating points on lines
c) Prolonging survey lines
d) Measuring horizontal distances
Explanation: Theodolite is the most precise instrument designed for the measurement of horizontal and vertical angles. It has wide applicability in surveying such as laying off horizontal angles, locating points on line, prolonging survey lines, establishing grades etc.
9. Which of the following cannot be done with the help of theodolite in surveying?
a) Establishing grades
b) Determining the difference in elevation
c) Setting out curves
d) Determining the area of ground
Explanation: Theodolite is the most precise instrument designed for the measurement of horizontal and vertical angles. It has wide applicability in surveying such as laying off horizontal angles, locating points on line, prolonging survey lines, establishing grades, determining the difference in elevation, setting out curves etc.
10. A transit theodolite is one in which the line of sight can be reversed by resolving the telescope through 180° in a vertical plane.
a) true
b) false
Explanation: Theodolite may be classified as transit and non-transit theodolite. A transit theodolite is one in which the line of sight can be reversed by resolving the telescope through 180° in a vertical plane.