Minimum depth of ballast cushion for a Broad Gauge wooden sleeper of size 275x25x13 cm with 75cm sleeper spacing is________________?

A. to permit lateral movement of the tongue rail
B. to 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
D. to prevent any vertical movement between the wing rail and nose of crossing

i) heel divergence
ii) length of tongue rail
iii) flangeway clearance
iv) throw of switch
The correct answer is?
A. (i) and (ii)
B. (ii) and (iii)
C. (iii) and (iv)
D. (i)and(iv)

A. 28.49 m
B. 21.04 m
C. 14.24 m
D. 7.45 m

A. 1:1
B. 1.5:1
C. 2:1
D. 1:2

A. dog spike
B. rail screw
C. elastic spike
D. round spike

A. 100 mm
B. 122.2 mm
C. 136.5 mm
D. 146.0 mm