169.  In India the rails are manufactured by
A. open hearth process
B. duplex process
C. both (a) and (b)
D. neither (a) nor (b).

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170. The weight of the rails depends upon
A. gauge of the tracks
B. speed of trains
C. spacing of sleepers
D. all the above.

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171.  In Indian railways, the ratio of axle load and weight of rail, is
A.312
B.412
C.512
D.600

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172.  On B.G. tracks the distance of outer signal from station limit is kept
A. 510 m
B. 520 m
C. 530 m
D. 540 m

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173. Advantage of automatic signalling, is :
A. increased safety
B. reduction in delays
C. increase in track capacity
D. all the above.

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174. Consider the following statements : Assertion A: Distorted alignment of the rail track is called buckling of rails Reason R : Insufficient expansion gaps, and ballast; Excessive creep and long welded rails Codes :
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true.

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175. Consider the following statements : 1. Treads of wheels of railway vehicles are given a slope 1 in 20 outwardly 2. Tops of rails are tilted inwards at a slope of 1 in 20 by adzing the wooden sleepers or with the help of canted bearing plates 3. Tops of rails is switches and crossings are not tilted Of these statements:
A. 1, 2, 3 are correct
B. 1, 2 are correct
C. 1, 3 are correct
D. 2, 3 are correct.

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