All rail cars and locomotives built to this specification can use any standard gauge railroad line in the world. However, not all railroads have been built to standard gauge. In the United States, gauge can vary slightly between 4 feet, 8.5 inches to 4 feet, 9.5 inches (1,460 mm). Gauge is the measure of distance between the railroad rails. The distance is usually

The effect of all the forces listed above is to cause movement of soil from high points to low points. The most important of such forces is the component of gravity that acts in the direction of probable motion. The various effects of flowing or seeping water are generally recognized as very important in stability problems, but often these effects have not been

Automobile parking area: This should be on city side. Hangars: These are for servicing, repair and storage aircrafts. They may be located on one side of terminal building. Gate position: It is a space allotted to an aircraft for parking at a loading apron. Runway: It is a paved long and narrow rectangular strip which is actually used for landing and take off of aeroplanes.

It involves the design and construction of facilities for the landing, take off, movement of aircraft on the ground, parking of aeroplanes on loading aprons, maintenance and repairs of areas, access roads from the city side to airport, and handling of passengers, baggage and freight. Aviation means flying with the aid of a machine, heaver than air.

From placing to final set, concrete is in a plastic, semi-fluid state. Heavier particles (aggregates) have tendency to move down (SEGREGATION) Mix water has a tendency to move up (BLEEDING). A layer of water (~ 2 % or more of total depth of concrete) accumulates on surface, later this water evaporates or re-absorbed into concrete.