component of Railway tracks in increasing order during construction of railway track?
No Details
Question 63
The Nationalisation of Railway started on?
No Details
Question 64
The Railway board was established with one president and two members on?
No Details
Question 65
The Great Indian Peninsula Railway company started construction of railway line from?
The Great Indian Peninsula Railway company started construction of railway line from Bombay to Thane in year 1850
Question 66
East Indian Railway Company was formed by .......................... for the construction of railway line?
Mr RM Stephenson formed East Indian Railway Company in year 1844
Question 67
The first proposal for construction of railway line between which cities was conceived in year 1831-33, but it did not materilised ?
No Details
Question 68
consider three dimensional system subjected to stress in x, y, z directions, then total strain in x direction is?
lateral strain = - poisson ratio x longitudinal strain
Question 69
Find the young Modulus of a brass rod of diameter 25 mm and of length 250mm which is subjected to a tensile load of 50kN when the extension of the rod is equal to 0.3 mm.?
stress = force/area = 50000N/0.785 x 25 x 25 = 101.91 N/sq(mm)
strain = extension of rod/original length of rod = 0.3/250 = 0.0012
now,
modulus of elasticity = stress/strain = 101.91/0.0012 = 84925 N/sq(mm)
Question 70
Find the Minimum diameter of a steel wire, which is used to raise a load of 4000 N if the stress is not exceed 95MN/sq(m)?
Stress = 95 x 10^6 N/sq(m) = 95 N/sq(mm) = force/Area
also
Area = Force/Stress = 4000/95 =42.105 sq(mm)
also
Area = 0.785xdiameterxdiameter
hence
diameter = (42.105/0.7850^0.5 =(53.64)^0.5 =7.32 mm = 0.732 cm
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