Vanadium steel is generally used for railway switches and crossing bearing balls

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axles and springs.

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2. Which one of the following statements is correct?
Options
A. During the day, earth reflects solar radiation
B. During the day earth reflects both solar radiation the emission from its surface
C. During the night, earth emits radiation from its surface
D. All of these

4. If a member is subjected to a tensile force P, having its normal cross-section A, the resulting shear stress in an oblique plane inclined at an angle ? to its transverse plane, is
Options
A.
B.
C.
D.
E.

5. Right ascension of a heavenly body is its equatorial angular distance measured
Options
A. westward from the first point of Libra
B. eastward from the first point of Aeries
C. westward from the first point of Aeries
D. eastward from the first point of Libra.

6. Reference pillars fixed on the centre line of a proposed road, provide the following information:
Options
A. reduced distance (R.D.)
B. horizontal distance of road from the centre line
C. reduced level at the top of pillar
D. formation level of the road
E. all the above.

7. Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for
Options
A. half oscillation
B. quarter oscillation
C. complete oscillation
D. none of these.

8. Pick up the correct statement from the following:
Options
A. Continuous grading is not necessary for obtaining a minimum of air voids
B. The omission of a certain size of aggregate is shown by a straight horizontal line on the grading curve
C. The omission of a certain size of aggregate in concrete increases the workability but also increases the liability to segregation
D. All the above.

10. Di-calcium silicate (C₂S)
Options
A. hydrates rapidly
B. generates less heat of hydration
C. hardens rapidly
D. provides less ultimate strength to cement
E. has less resistance to sulphate attack.

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