Explanation

Cantilever Sheet Piles:

• Best for shallow depths up to 6 meters.
• Relies entirely on the lateral passive resistance of the soil in front of the wall for stability.
• Larger depths cause extreme bending moments and deflections, requiring excessively heavy, thick, and costly pile sections

Explanation

• The horizontal movement of rails along the track is called rail creep,
• This is the longitudinal slip or forward movement of rails under traffic.
• Causes of Rail Creep
• Wheel impact and rolling loads from moving trains
• Starting and braking forces of trains

Explanation

• A geodetic survey is generally used for an area greater than 250 km² (or approximately 195.5 to 200 square miles),
• Where the shape and curvature of the Earth must be taken into account.

Additional information 

• Plane Surveying: Used for smaller areas under 250 km² where the Earth is treated as a flat surface.

Explanation

• A topographical map represents both natural and man-made features of an area.
• Natural features include rivers, trees, hills, valleys, and lakes.
• Man-made features include roads, buildings, bridges, and railways.

Explanation

• The joints of a truss should ideally experience purely concentrated point loads.
• In an ideal truss, loads are assumed to act at the joints (nodes).
• Truss members are subjected mainly to axial tension or compression

Explanation

• The command used in AutoCAD to make round edges is the Fillet command
• Shortcut: F → Enter.
• It creates a curved connection with a specified radius.
• It is commonly used for rounding the corners of lines, arcs, polylines, and other objects.

Explanation

• AutoCAD Civil 3D is widely used for road and highway geometric design.
• It can create horizontal and vertical alignments.

Explanation

• A brick is considered weak if it absorbs more water
• More pores: High water absorption shows the brick has too many empty spaces inside.
• Less strength: These empty spaces make the brick weak and unable to hold heavy weight.

Additional information

• Good quality bricks should have low water absorption, typically less than 20% of their dry weight.

Explanation

For a simply supported beam carrying a UDL over the entire span:

• The maximum bending moment occurs at the center of the span.
• Formula: Mmax = wL^2/8​
• w = uniformly distributed load per unit length.
• L = span of the beam.

Explanation

• For an uncontrolled spillway, the freeboard generally provided is 3–4 m.
• Uncontrolled (ungated) spillways have no gates to regulate flow,
• So the dam must safely pass floodwaters without overtopping by a significant margin.
• This requires a larger freeboard buffer.

Additional information

• Controlled (gated) spillways: Since flow can be regulated, a smaller freeboard of 1–2 m is usually sufficient.