Q.1
Which formula is used for the calculation of number of crossing based on Centre line method?
  • a) 2N = cot (α/2)
  • b) N = cot (α/2)
  • c) 2N = tan (α/2)
  • d) N = tan (α/2)
Q.2
What is another name of Coles method?
  • a) Isosceles method
  • b) Right angle method
  • c) Centre line method
  • d) Back toe method
Q.3
All the methods used for determining the number of crossing give the same value.
  • a) True
  • b) False
Q.4
What is the limiting wear for a crossing?
  • a) 50mm
  • b) 10mm
  • c) 15mm
  • d) 25mm
Q.5
What is done for reconditioning of crossings at site?
  • a) They are hammered
  • b) Gas welding
  • c) Replacing the elements
  • d) Filling of material in gaps
Q.6
Which of the following is used for gas welding of crossings?
  • a) Oxyacetylene flame
  • b) Methylene flame
  • c) Nitrogen-carbon dioxide flame
  • d) Ozone flame
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