Civil Engineering MCQs

Page No. 135

The limiting value of cant gradient for all gauges is___________________?


a 1 in 360


b1 in 720


c1 in 1000


d 1 in 1200


View Answer 1 in 720

Vertical curves are provided where algebraic difference between grades is equal to or_________________?


aless than 2 mm/m


bmore than 2 mm/m


cless than 4 mm/m


dmore than 4mm/m


View Answer more than 4mm/m

The steepest gradient permissible on a 2.5° curve for Broad Gauge line having ruling gradient of 1 in 200 is___________________?


a 1 in 250


b1 in 222


c 1 in 235


d 1 in 275


View Answer 1 in 250

Cant deficiency occurs when a vehicle travels around a curve at_________________?


a equilibrium speed


bspeeds higher than equilibrium speed


c speeds lower than equilibrium speed


dbooked speed



The shape of transition curve used by Indian Railways is____________________?


acubic parabola


bspiral


csine curve


d lemniscate of Bernoulli


View Answer cubic parabola

One degree of curve is equivalent to__________________?


a 1600/R


b 1700/R


c1750/R


d1850/R



Stretcher bar is provided________________?


a to permit lateral movement of the tongue rail


bto maintain the two tongue rails at the exact distance


c to ensure exact gauge at the toe of the switch as well as the nose of crossing


dto prevent any vertical movement between the wing rail and nose of crossing



If a is the angle of crossing, then the number of crossings ‘N’ according to right angle method is given by_________________?


aVi cot(cc/2)


bcot(oc/2)


ccot(A)


d Vi cosec(a/2)


View Answer cot(A)

Lead of crossing is the distance from the__________________?


a heel of the switch to the toe of the switch


b heel of the switch to the theoretical nose of the crossing


c toe of the switch to the theoretical nose of crossing


d toe of the switch to the actual nose of crossing



The correct relation between curve lead (CL), switch lead (SL) and lead of cros¬sing (L) is given by__________________?


aCL = L – SL


bL =CL-SL


cSL = L + CL


d L = (CL+SL)/2


View Answer L =CL-SL

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