Objective of Railway Engineering - Set 15 - ObjectiveBooks

# Practice Test: Question Set - 15

1. If the standard length of a crossing is 480 cm, the number of crossing is
(A) 1 in 8½ of B.G.
(B) 1 in 8½ of M.G.
(C) Both (a) and (b)
(D) None of these

2. Width of ballast section for Broad Gauge is
(A) 1.83 m
(B) 2.25 m
(C) 3.35 m
(D) 4.30 m

3. Minimum length of a transition curve required for
(A) 2° curves for a maximum permissible speed of 135 km/hr, is 220 metres
(B) 4° curves for a maximum permissible speed of 95 km/hr, is 220 metres
(C) 6° curves for a maximum permissible speed of 80 km/hr, is 220 metres
(D) All the above

4. For points and crossings, maximum size of ballast, is
(A) 50 mm
(B) 40 mm
(C) 30 mm
(D) 25 mm

5. Which of the following methods of designation of crossing is mostly used in India?
(A) Center line method
(B) Right angle method
(C) Isosceles angle method
(D) None of the above

6. For calculating the length of curve lead (C.L.), the correct formula is
(A) C.L. = G. cot Î±/2
(B) C.L. = √(2IG)
(C) C.L. = 2 GN
(D) All the above

7. In a railway track, permissible gauge with tolerance under loaded condition, is
(A) G + 0.1 mm
(B) G + 1.5 mm
(C) G - 1.0 mm
(D) G - 1.5 mm

8. Yellow light-hand signal indicates
(A) Stop
(B) Proceed
(C) Proceed cautiously
(D) None of the above

9. The first Indian railway was laid in
(A) 1775
(B) 1804
(C) 1825
(D) 1853

10. Sand may be used as ballast for
(A) Wooden sleepers
(B) Steel sleepers
(C) Cast iron sleepers
(D) All the above

11. What will be the curve lead for a 1 in 8.5 turnout taking off from a straight broad gauge track?
(A) 28.49 m
(B) 21.04 m
(C) 14.24 m
(D) 7.45 m

12. A scissors cross-over consists of
(A) Two pairs of points, four acute angle crossings and two obtuse angle crossings
(B) Four pairs of points, four acute angle crossings and four obtuse angle crossings
(C) Four pairs of points, six acute angle crossings and two obtuse angle crossings
(D) Two pairs of points, six acute angle crossings and four obtuse angle crossings

13. The effective bearing area of all types of sleepers, is
(A) 0.40 m2
(B) 0.42 m2
(C) 0.44 m2
(D) 0.46 m2

14. The cross-sectional area of 52 kg flat footed rail is
(A) 6155 mm2
(B) 6615 mm2
(C) 7235 mm2
(D) 7825 mm2

15. If Î± is switch angle and R is radius of the turnout, the length of the tongue rail, is
(A) R sin Î±
(B) R tan Î±
(C) R sin Î±/2
(D) R tan Î±/2

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