This set of Railway Engineering Questions & Answers for Exams focuses on “Ill Effect of Rail Joint and Requirement of Ideal Rail Joint”.
1. Which of the following are the weakest links in a track?
b) Middle point of the track
c) Tongue rails
d) Highest point of curves
Explanation: The weakest link in a track is rail joint. There is a break in continuity of the rail at the joint because of presence of expansion gap and improper levels of rail heads.
2. Why does the joint require frequent attention?
a) It is of low quality
b) It gets displaced easily
c) They are of small size
d) They are difficult to handle
Explanation: Huge load acts upon the joint when train passes from one rail to another. Due to this the track geometry gets distorted and can cause accidents. To fix this the joints should be looked after frequently.
3. Which of the following is not associated with rail joints?
a) Increase in noise effects
b) Impact on quality
c) Lesser fuel consumption
d) Chances of sabotage
Explanation: Because of presence of joints, there are effects like noise pollution, sabotaging chances and excessive wear of track components. The train requires extra efforts to haul itself over these joints which leads to increase in fuel consumption.
4. How much should be the strength of a rail joint?
a) Equal to the rail
b) Half of the rail
c) Equal to the weight of the train
d) Double the rail strength
Explanation: A rail joint will be called an ideal joint if its strength is equal to the strength of the parent rail. Also, an ideal rail is the one having same stiffness as the parent rail.
5. Why is it necessary for the joint to hold the rail ends together?
a) To provide continuity
b) To make the joint rigid
c) To increase the cost
d) To make it inelastic
Explanation: The rail joint should be elastic and flexible. The rails should be held together to keep the track continuous. This helps in avoiding wheel jumping or deviation of wheel from its original path.
6. Rail joint should not have any gap in between two rails.
Explanation: Adequate gap is provided between two rails at the joint. This gap is called expansion gap and is important for expansion and contraction of the rails that may occur due to temperature changes.
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