Railways - Engineering

Q1:

A CST-9 sleeper consists of

A two inverted triangular pots on either side of rail seat

B a central plate with a projected key and box on the top of plate

C a tie bar and 4 cotters to connect two cast iron plates

D a single two way key provided on the gauge side to hold the rail to sleeper

E all the above.

ANS:E - all the above.

What do you mean by CST-9 sleepers?