If a is the angle of crossing, then the number of crossings ‘N’ according to right angle method is given by_________________?
(A) Vi cot(cc/2)
(B) cot(oc/2)
(C) cot(A)
(D) Vi cosec(a/2)
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
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__________________?
(A) CL = L – SL
(B) L =CL-SL
(C) SL = L + CL
(D) L = (CL+SL)/2
Flangeway clearance is the distance_________________?
(A) between the adjoining faces of the running rail and the check rail near the crossing
(B) between the gauge faces of the stock rail and the tongue rail
(C) through which the tongue rail moves laterally at the toe of the switch
(D) none of the above
Which of the following mechanical devices is used to ensure that route cannot be changed while the train is on the point even after putting back the signal ?
(A) detectors
(B) point lock
(C) iock bar
(D) stretcher bar
The object of providing a point lock is_________________?
(A) to ensure that each switch is correctly set
(B) to ensure that the point may not be operated while the train is on it
(C) to detect any obstruction between and tongue rail
(D) none of the above
The nominal size of ballast used for points and crossings is___________________?
(A) 25 mm
(B) 40 mm
(C) 50 mm
(D) 10mm
The sleepers resting directly on girder are fastened to the top flange of girder by________________?
(A) hook bolts
(B) dog spikes
(C) fang bolts
(D) rail screws
Width of ballast section for Broad Gauge is_________________?
(A) 1.83 m
(B) 2.25 m
(C) 3.35 m
(D) 4.30 m