# Railway Engineering Questions and Answers – Preliminary Survey

This set of Railway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Preliminary Survey”.

1. What is the objective of Preliminary survey?
a) To estimate the cost of the proposed railway line
b) To study the traffic flow
d) To choose proper gauge

Explanation: Preliminary survey is done to determine the cost of the rail line to be constructed. Traffic survey is done to study the traffic the train will carry and various alignments are analysed in Reconnaissance survey.

2. What is done to estimate the cost of the rail line to be constructed in Preliminary survey?
a) Instrumental examination of the route to be selected
b) Study the topography with the help of maps
c) Meeting with local bodies and prominent people
d) Cost is estimated based on different lines of similar alignments

Explanation: The survey team estimates the cost of the new line by calculations based on the readings of the instrumental survey. Based on the reports of Reconnaissance survey and Preliminary survey the railway administration then decides whether to construct the new line or not.

3. Why is Theodolite used for Preliminary survey?
a) For measuring magnetic bearings of alignments
b) For traversing the centre line
c) For pegging the centre line
d) For both traversing and pegging the centre line

Explanation: With the help of theodolite horizontal and vertical angles can be measured. In field it is used for Traversing and pegging the centre line. Magnetic bearing is measured with the help of prismatic compass.

4. What is the use of Tacheometer in Preliminary survey?
a) For taking longitudinal and cross levels
b) For plotting main features
c) For pegging the centre line
d) For getting details of various features

Explanation: For taking longitudinal and cross levels dumpy level is used. Plane table is used for getting details of various features and tacheometer is used for plotting main features.

5. The survey done on site usually covers a width of 200m on either side of the alignment.
a) True
b) False

Explanation: While doing survey on site longitudinal and cross levelling is also done 200m on either side of the alignment. This is to ensure high accuracy of the contour maps.

6. Which among the following is not a part of the report prepared after Preliminary survey?
a) Characteristics of project area
b) Route selection
c) Standard of Construction
d) Population projection and volume projection of Traffic

Explanation: After the Preliminary survey a report is prepared which contains the cost estimate of the project. It should also contain the Characteristics of the project area, Standard of Construction, Route selection and Conclusions and recommendations. Population projection and volume projection is a part of Traffic survey.

Sanfoundry Global Education & Learning Series – Railway Engineering.