Bone shaped section of fish plate is commonly used for connecting
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double headed rails
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flat footed rails
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bull headed rails
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all above are correct
B
Correct answer
Explanation
Fish plates (also called joint bars) used with flat-footed rails have a distinctive bone-shaped cross-section. This shape provides better grip and support for the flat bottom of the rail section. Double-headed and bull-headed rails use differently shaped fish plates designed for their specific profiles.