Write short notes on the following terms? 1.Train delay? 2.Twenty four hour timing system in railway operation? 3.Whestle board? 4.Derailer? 5.Facing point board? 6.Speed restrictions board? ?

1. Train delay: Train delay refers to the situation where a train does not arrive at its destination at the scheduled time. This can be caused by various factors such as mechanical issues, signal failures, track maintenance, weather conditions, or unexpected incidents on the railway line.

2. Twenty-four hour timing system in railway operation: The twenty-four hour timing system in railway operation refers to the use of a 24-hour clock to schedule and manage train operations. This system is commonly used in railway operations to avoid confusion between AM and PM timings and to ensure accurate scheduling of trains throughout the day and night.

3. Whistle board: A whistle board is a signboard placed along the railway track to indicate to train drivers when they should sound the train's whistle. These boards are typically placed at locations where there are level crossings, sharp curves, or other potential hazards to alert pedestrians or vehicles of an approaching train.

4. Derailer: A derailer is a device used to prevent trains from accidentally rolling onto a track where they are not supposed to go. Derailers are typically installed at the end of a track or at a switch point to divert a train off the track and prevent it from entering a restricted area.

5. Facing point board: A facing point board is a signboard placed at a railway junction to indicate to train drivers that they are approaching a set of points where the train will be directed onto a different track. This board helps train drivers to be aware of upcoming track changes and to adjust their speed and direction accordingly.

6. Speed restrictions board: A speed restrictions board is a signboard placed along the railway track to inform train drivers of specific speed limits that must be followed in a particular section of the track. These boards are used to ensure the safety of trains and passengers by controlling the speed of trains in areas where there may be curves, gradients, or other factors that require reduced speeds.

1. Train Delay:
A delay in the scheduled departure or arrival of a train due to unforeseen circumstances, such as mechanical problems, signal failures, or track obstructions.

2. Twenty-four Hour Timing System in Railway Operation:
A timekeeping system where time is measured in hours and minutes from a predetermined reference point (usually 00:00 hours), regardless of the actual time of day.

3. Whistle Board:
A small signboard placed at a specific location along the track, indicating to the train driver where to sound the train's whistle.

4. Derailer:
A device placed on or near a track to prevent trains from derailing. It typically consists of a movable rail that can be activated to guide the train into a siding or off the main line.

5. Facing Point Board:
A signboard placed on the approach side of a facing point (a switch where the train takes a diverging path), indicating the position of the switch.

6. Speed Restrictions Board:
A signboard placed along the track to indicate the maximum permissible speed for trains in a particular section.