1. Where is the first base depot for unloading of materials situated at?
a) End of existing line
b) Start of new line
c) Junction of existing line and new line to be constructed
d) Anywhere based on the topography of the area
Explanation: The first depo is at the junction of the new line to be constructed and the existing line. Track material is carried up to the rail head from the depo with the help of a Dip lorry. Material gangs are then used to unload these materials.
2. Which special type of rail carrier is used for carrying of rails?
a) Anderson rail carrier
b) Smith rail carrier
c) Dip lorry
d) Rail tongs
Explanation: Each rail weighs around 600kg and huge manpower is required for handling them. Consequently a special type of rail carrier is used. This is the Anderson rail carrier which can easily carry rails with lesser strain.
3. For which type of sleepers rail screws are used?
a) Concrete sleepers
b) Steel Sleepers
c) Cast iron sleepers
d) Wooden sleepers
Explanation: For fixing rails to wooden sleepers rail screws are used. A key is used in case of steel sleeper. Bearing plates are provided according to need and track specifications.
4. Expansion gap between rails is provided with the help of ______
a) rail screws
b) steel liners or shims
c) bolts
d) fastenings
Explanation: Adequate gaps are left between two rails which are called as expansion gaps. Steel liners or shims of appropriate thickness are used for providing these gaps.
5. Which among the following is generally used for Ballasting of tacks?
a) Ballast trains
b) Ballast trains and manual methods
c) Human efforts
d) Dip lorry
Explanation: The ballast is thoroughly packed and laid under the track. For laying of ballast, ballast trains can be used. Otherwise the ballast can be carried on the cess and laid manually on the track.
6. What measure is taken in case of curves to account for the centrifugal force acting on the train?
a) Superelevation is provided
b) Rack rail is provided
c) Different sleepers are used
d) Formation is different
Explanation: The outer edge of the track is raised with respect to the inner edge in case of a curve. This is called as superelevation, which counters the effect of the centrifugal force acting on the train.
7. Why the railway track is made resilient and elastic?
a) To make it economic
b) So that it absorbs shocks
c) It can be adjusted easily
d) Easy fixing
Explanation: The trains exert a lot of pressure on the tracks. They are made elastic and robust so that they can absorb these shocks and vibrations easily.
8. Which of the following is not a requirement of a good track?
a) Good lateral strength
b) Good drainage property
c) Aesthetic appearance
d) Low cost and maintenance
Explanation: The track experiences various temperature changes and must have good lateral strength to maintain its stability against them. It should have good drainage property and low constructionand maintenance cost. It is not mandatory to make the track aesthetic.
9. What does ‘M’ represent in the sleeper density formula M+7?
a) Length of rail in meters
b) Length of sleepers in meters
c) Length of sleepers in centimetres
d) Length of rail in centimetres
Explanation: Sleeper density of a track can vary from M+7 to M+4 depending upon the weight and volume of traffic. Here M represents the length of rail in meters.
10. Which method is mostly used for converting short welded rails to long welded rails?
a) Flash butt welding
b) Thermit welding
c) Anderson welding
d) Both Thermit and flash butt welding
Explanation: Thermit welding is used at site to convert short welded rails to long welded rails. Various fastenings such as screws, rail spikes and keys ae used to fix rails to sleepers. Flash butt welding is used to weld rails into three rail panels.