1) Which quantity does not change when there is an increase in temperature? a) the density of a steel block b) the diameter of the hole in a metal nut c) the length of an iron rod d) the mass of a metal coin 2) Rate of thermal expansion is more in a) Gases b) Liquids c) Solids d) Non of the above 3) When a bridge is built, a gap is left between each concrete slab, why? a) The gaps expands on warm days. b) Concrete contracts on warm days. c) Concrete expands on warm days. d) The gaps contract on cold days. 4) Bimetallic strip is used for  a) Thermal circuit breakers b) Fire alarms c) Thermometers d) All of them. 5) A circular metal disc is heated. Which quantity decreases? a) its density b) its diameter c) its thickness d) its volume

Thermodynamics Quiz

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