This set of Railway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Maintenance of Rail Surface”.
1. What is hogging of joints?
a) Depression of rail ends at joints
b) Depression of the middle part of the rail
c) Corrosion of joints
d) Staggering of rails
View Answer
Explanation: In hogging of joints, the two rail ends at the joint get depressed. This may be because of poor maintenance of joints, loose and faulty fastenings or other such reasons.
2. What should preferably be done to remove hogging if it occurs on a small scale?
a) Cropping the hogged portion
b) Dehogging machine
c) Over packing of joint sleepers
d) Replacing the whole rail
View Answer
Explanation: If dehogging occurs on a small scale the fittings are tightened and the joint sleepers are over packed. Liners and shims can be used in removing the defect in case the fittings are loose.
3. What can happen if there is provision of wooden sleepers in a track that is normally laid with metal sleepers?
a) Hogging of rails
b) Sagging of rails
c) High joints
d) Pumping joints
View Answer
Explanation: Such discrepancies in the type of sleepers can result into High joints. This results in production of effect of camel back riding and makes the journey very uncomfortable.
4. Which of the following is correct in case of pumping joints?
a) It pumps out mud and water
b) It pumps out only mud
c) It pumps out fine dust
d) It occurs in dry season
View Answer
Explanation: A joint which blows fine dust during passage of train is called blowing joints. In rainy seasons these joints pump mud and water and are known as pumping joints.
5. Which of the following activity must be done when the track undergoes regrading?
a) Lifting of track
b) Providing drainage facilities
c) Replacing the joints
d) Adjusting the creep
View Answer
Explanation: When the yard is remodelled or sag is developed due to defective maintenance lifting of track becomes necessary. A maximum of 75mm of track should be lifted at a time.
6. What can be done to remove the Centre bound sleeper defect?
a) Lifting of track
b) Over packing of joints
c) Loosening the ballast at ends
d) Loosening the ballast at the centre
View Answer
Explanation: Sometimes the sleeper starts to receive support at the centre instead of ends. This defect leads to rocking of trains and degrades quality of track. It can be removed by loosening the ballast at the centre of sleeper.
7. Excessive lifting can be done if work is done under speed restrictions.
a) True
b) False
View Answer
Explanation: Track lifting becomes necessary to eliminate sags, yard remoulding and bridge construction. In single lines lifting should start from downhill gradient and continue in direction of rising gradient. For work involving excessive lifting speed restrictions should be imposed.
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