Science MCQs

The bends (expansion loops) allow the pipeline to expand and contract without breaking.

Mercury has a uniform and predictable rate of expansion with temperature change.

Heat from a fire travels in straight lines as infrared radiation warming objects without heating the air in between.

Shiny surfaces are poor absorbers and good reflectors of radiant heat.

A bimetallic strip bends when heated because the two metals expand by different amounts.

Water has an irregular expansion pattern and freezes at 0°C making it unsuitable.

The gap and rollers allow the bridge to expand and contract with temperature changes without causing structural damage.

A good conductor, like metal, readily allows the transfer of thermal energy.

The contraction of the cooling rivet creates a strong force that pulls the plates together, forming a tight joint.

The narrow tube ensures that a small change in the volume of the liquid results in a large, easily visible change in length.