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Consider the following statements concerning railways: 1. A level stretch equal to the maximum train length is to be provided between the gradient reaches where a rising gradient is followed by a falling gradient. 2. Vertical curves in railway tracks are not set out as parabolas. 3. Diamond crossings can be laid on curves also. 4. Curves should be avoided at the top level segment of bridges. Which of the above statements are correct?

Consider the following statements concerning railways: 1. A level stretch equal to the maximum train length is to be provided between the gradient reaches where a rising gradient is followed by a falling gradient. 2. Vertical curves in railway tracks are not set out as parabolas. 3. Diamond crossings can be laid on curves also. 4. Curves should be avoided at the top level segment of bridges. Which of the above statements are correct? Correct Answer 1 and 3 only

A level stretch equal to the maximum train length is to be provided in order to avoid jerks at peak.

Vertical curves in railway tracks are set out as parabola in order to provide smooth riding quality.

A Diamond Crossing in railway terminology is the point where two railway lines cross (not necessarily at right angles, forming the shape of diamonds at the crossing point.  It can be laid on straight line as well as on curves.

Deviation in the response of the curved bridges are required to avoid traffic congestion and to increase the aesthetics of the structure at any level of segment of bridge.

Related Questions

There is only one rail track between stations A and B on a railway line. One hour after the northbound superfast train N leaves station A for station B, the southbound passenger train S reaches station A from station B. The speed of superfast train is twice that of express train E, while the speed of passenger train S is half of that of train E. On some one day train N leaves from station A to station B 20 minutes late than its usual schedule. Both Train N and Train S have increased their speed to maintain the schedule as per the table. If the superfast train doubles its speed, then what should be the ratio (approximately) of the speed of the passenger train to the speed of the superfast train so that the passenger train reaches the station on that day at the exact scheduled time.
Each of the question below consists of a question and three statements number I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question. A bag contains some number of Diamond of 4 different colors (Red, Pink, blue and yellow). What is the total number of Diamond in the bag? I. If 5 Pink Diamond from the bag are replaced by Yellow Diamond, Then the ratio of probabilities of picking 2 yellow Diamond at a time to picking 3 Blue Diamond at a time becomes (1/116). II. The different between probabilities of picking 2 Red Diamonds at a time and probability of picking 2 Blue Diamonds at a time is (23/330). III. If a Diamond is picked from the bag, then there is 40% chance that it is a red Diamond. Probability of picking 2 Red Diamond from the bag is (26/165).
In a scissors cross-over, the crossings provided are
i) 2 obtuse angle crossings
ii) 4 obtuse angle crossings
iii) 4 acute angle crossings
iv) 6 acute angle crossings
The correct answer is
Statement : On an average, about twenty people are run over by trains and die every day while crossing the railway tracks through the level crossing. Courses of Action : I. The railway authorities should be instructed to close all the level crossings. II. Those who are found crossing the tracks, when the gates are closed, should be fined heavily.
Statement : On an average, about twenty people are run over by trains and die every day while crossing the railway tracks through the level crossing.

Courses of Action :
I. The railway authorities should be instructed to close all the level crossings.
II. Those who are found crossing the tracks, when the gates are closed, should be fined heavily.
Indifference curves relating to supply of labour have a number of properties some of which are mentioned below
1. Indifference curves are downward slopping
2. Indifference curves are upward slopping
3. Higher indifference curves indicate lower levels of utility
4. Higher indifference curves indicate higher levels of utility
5. Indifference curves do not intersect
6. Indifference curves intersect
7. Indifference curves are concave to the origin
8. Indifference curves are convex to the origin
Which among the following properties are not true?
In each question below is given a statement numbered I, II and III. An assumption is something supposed or taken for granted. You have to consider the following assumption and decide which of the assumption is implicit in the statement. Statement: An alert motorman averted a major tragedy today when he applied emergency brakes right on time, stopping his train just a few meters away from the spot where part of a road overbridge had collapsed in suburban Andheri. The motorman (driver), Chandrashekhar B Sawant, who was steering the Churchgate-bound 7.06 am suburban train from Borivli, saw a portion of the road overbridge falling as he was nearing the Andheri station. Assumptions: I. The road overbridge, built-in 1971, collapsed near the eastern side of the Andheri railway station and part of it fell on the rail tracks.  II. The driver immediately applied emergency brakes and the train stopped a few meters from the spot where the bridge collapsed. III. The collapse was accompanied by a big thud sound of the falling debris.
Suppose, 20 parallel railway tracks are intersected by another 30 parallel railway tracks. How many parallelograms will be formed by the intersection of these railway tracks?
Statement : As many as ten coaches of a passenger train have derailed and blocked both pairs of the railway tracks.

Courses of Action :
I. The railway authorities should immediately send men and equipment to the spot to clear the railway tracks.
II. All the trains running in both the directions should be diverted to other routes.
Statement : In one of the worst accidents in railway level crossing, fifty people died when a bus carrying them collided on to a running train. Courses of Action : I. The train driver should immediately be suspended. II. The driver of the bus should be tried in court for negligence on his part. III. The railway authority should be asked to man all its level crossings.