Electrical Engineering XYZ MCQs
Which of following is a constituent in speed time curve of train:
- Constant speed
- Coasting
- Initial acceleration
- All of these
Correct answer: 4. All of these
Explanation:
In the speed-time curve of a train, all of the mentioned constituents are typically present:
- Constant speed: This refers to the phase where the train maintains a steady speed without any change. In a speed-time graph, this appears as a horizontal line segment indicating that the speed remains constant over a period of time.
- Coasting: Coasting refers to the phase where the train is neither accelerating nor decelerating, essentially moving with its momentum. In a speed-time graph, this appears as a straight line segment with zero slope, indicating that the speed remains constant but differs from the previous phase in that it’s not powered by the train’s engine.
- Initial acceleration: This refers to the phase where the train is accelerating from rest or from a lower speed to a higher speed. In a speed-time graph, this appears as a curve or an upward-sloping line segment indicating an increase in speed over time.
Thus, all of these constituents are integral parts of a train’s speed-time curve, representing different phases of its motion.