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Q: Which of the following tools is used to check the difference in cross levels or the super elevation in a highway?
  • A. Cow bar
  • B. Canne-a-boule
  • C. Cant bar
  • D. Cant board
Correct Answer: Option D - Cant board–It is used to check the difference in cross level or the super elevation, in other hand. It helps ensure the road surface is properly inclined for drainage and vehicle stability, especially on cures. Canne-a-boule–A canne-a-boule is used for assessing the extent of voids in the packing under the sleepers The canne-a-boule is dropped from a height of 40 cm at both ends of sleepers. The height of rebound and the sound emitted in the process determines the extent of the existing of packing voids. Crow bar–To correct track alignment and to lift the track for surfacing.
D. Cant board–It is used to check the difference in cross level or the super elevation, in other hand. It helps ensure the road surface is properly inclined for drainage and vehicle stability, especially on cures. Canne-a-boule–A canne-a-boule is used for assessing the extent of voids in the packing under the sleepers The canne-a-boule is dropped from a height of 40 cm at both ends of sleepers. The height of rebound and the sound emitted in the process determines the extent of the existing of packing voids. Crow bar–To correct track alignment and to lift the track for surfacing.

Explanations:

Cant board–It is used to check the difference in cross level or the super elevation, in other hand. It helps ensure the road surface is properly inclined for drainage and vehicle stability, especially on cures. Canne-a-boule–A canne-a-boule is used for assessing the extent of voids in the packing under the sleepers The canne-a-boule is dropped from a height of 40 cm at both ends of sleepers. The height of rebound and the sound emitted in the process determines the extent of the existing of packing voids. Crow bar–To correct track alignment and to lift the track for surfacing.