Railway Engineering MCQ with answer and solution

Concept

Pot (bowl) sleepers are a type of cast iron sleeper made of two bowls joined by a tie bar.

Step-by-step solution

1. Railway sleepers are grouped by material: wooden, steel, cast iron (CI), and concrete. 2. CI sleepers include pot (bowl) sleepers, plate sleepers, box sleepers and CST-9 sleepers. 3. A pot sleeper has two bowl-shaped CI pots, one under each rail, joined by a tie bar. 4. So pot and bowl sleepers are cast iron sleepers.

Explanation

Pot sleepers are also called bowl sleepers. They are made of cast iron and have two hollow bowls placed under the rails, connected by a tie bar. So they belong to the cast iron sleeper group.

Why the other options are wrong

A: Chock sleepers are small wooden blocks used in special places, not CI pots. C: Concrete sleepers are monoblock or twin-block RCC/PSC types, not pots. D: Steel sleepers are trough-shaped pressed steel plates, not CI bowls.

Shortcut

Pot = Bowl = Cast Iron (CI types: pot, plate, box, CST-9).

Common mistake

Confusing the twin-block shape of pot sleepers with twin-block concrete sleepers.