Blackberrys Technical Designer Interview Questions and Answers

Rail tracks are installed through a process involving surveying, grading, laying ballast, placing sleepers, and attaching rails.

• Surveying is done to determine the alignment and elevation of the track.

• Grading involves preparing the ground by removing vegetation and leveling the surface.

• Ballast, typically made of crushed stone, is laid to provide stability and drainage.

• Sleepers, also known as ties, are placed on the ball...read more

Track density refers to the number of tracks per unit length on a railway main track.

• Track density is an important factor in determining the capacity and efficiency of a railway system.

• It is usually measured in terms of tracks per kilometer or mile.

• Higher track density allows for more trains to operate simultaneously, increasing the system's capacity.

• Track density can vary depending on the type of railway line, such as...read more

The rail height for a 60kg rail and the size of ballast used in the track.

• The rail height for a 60kg rail is typically around 170mm.

• The size of ballast used in the track depends on various factors such as the type of track, soil conditions, and design specifications.

• Common ballast sizes range from 20mm to 50mm in diameter.

• The ballast should be well-graded and free from dust and fines to provide stability and drainage.

• P...read more