1. The positions of contour points between the guide points are located by _______
a) Estimation
b) Arithmetic calculations
c) Graphical method
d) Cross sections
Explanation: Estimation method is extremely rough and is used for small scale work only. The positions of contour points between the guide points are located by estimation.
2. Which of the following Interpolation method is accurate and time consuming?
a) by estimation
b) by Arithmetic method
c) by graphical method
d) by squares
Explanation: Arithmetic method is accurate but time consuming. The positions of contour between the guide points are located by arithmetic calculation.
3. In which of the following methods Interpolation is done with the help of a tracing paper?
a) by estimation
b) by Arithmetic method
c) by graphical method
d) by squares
Explanation: In the graphical method, the Interpolation is done with the help of a tracing paper. Sometimes tracing cloth is also used.
4. In cross sections method, cross sections are run traverse to the centre line of a road, railway or canal etc.
a) true
b) false
Explanation: In this method, cross sections are run transverse to the centre line of a road, railway or canal etc. The method is most suitable for railway route surveys.
5. In the case of hilly terrain, the tacheometric method may be used with advantages.
a) true
b) false
Explanation: In the case of hilly terrain, the tacheometric method may be used with advantages. A tacheometer is a theodolite fitted with stadia diaphragm so that staff readings against all the three hairs may be taken.
6. In cross sections method, If there are irregularities in the surface between two cross lines, additional guide points may be located on intermediate cross lines.
a) true
b) false
Explanation: If there are irregularities in the surface between two cross lines, additional guide points may be located on intermediate cross lines. If required, some of the cross lines may also be chosen at any inclination other 90° to the main line.
7. _______ is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal.
a) Contour gradient
b) Contour interval
c) Contour slope
d) Contour inclination
Explanation: Contour gradient is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal. If the inclination of such a line is given, its direction from a point may be easily located either on the map or on the ground.
8. If a level is used to locate the contour gradient, it is not necessary to set the level on the contour gradient.
a) true
b) false
Explanation: Contour gradient is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal. If a level is used to locate the contour gradient, it is not necessary to set the level on the contour gradient.
9. Which of the following cannot be used to locate the contour gradient in the field?
a) Clinometer
b) Theodolite
c) Level
d) Chain
Explanation: The method of locating the contour gradient on the map can be done in the filed by using clinometer, theodolite and level.
10. If the inclination of contour gradient is given, its direction from a point may be easily located either on the map or on the ground.
a) true
b) false
Explanation: Contour gradient is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal. If the inclination of such a line is given, its direction from a point may be easily located either on the map or on the ground.