1. Railway lines Cloze (1): JXUwMDFmJXUwMDI2JXUwMDExJXUwMDAz are left between the rails. If these Cloze (2): JXUwMDNmJXUwMDA2JXUwMDExJXUwMDAz for the expansion are not provided then during hot weather, they rails may buckle out, bend and cause derailment of the train leading to destruction and accidents.

    2. Steam pipes carrying steam from boilers are fitted with expansion joints to allow pipes to expand and     contract easily when steam passes through and when it cools down.

    3. Telephone wires they are loosely fixed to allow for contraction and Cloze (3): JXUwMDNkJXUwMDFkJXUwMDA4JXUwMDExJXUwMDBmJXUwMDFkJXUwMDFhJXUwMDA2JXUwMDAx . During cold weather, they Cloze (4): JXUwMDNiJXUwMDBjJXUwMDAxJXUwMDFhJXUwMDA2JXUwMDEzJXUwMDAyJXUwMDE3 and when it is warm they Cloze (5): JXUwMDNkJXUwMDFkJXUwMDA4JXUwMDExJXUwMDBmJXUwMDBh .Telephone or electricity wires appear to be shorter and taut in the morning.
However in hot afternoons, the wires appear longer and slackened.