Thermal Expansion Arithmetic: A Supplied Linear Model

Thermal Expansion Arithmetic: A Supplied Linear Model

Original quantitative learning practice in English. All 24 questions are included. Four supplied cases exercise six related calculation targets; they form one topic, not four separate tests. Every question includes the complete initial data. Use the stated model and retain intermediate precision. Choose one answer. Learning target: 20/24, not an official pass mark. This bank covers the calculation topic in its title; it is not a complete professional examination, design approval or operating instruction.
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Use ΔL=α×L0×ΔT. Initial length is 15 m at 20 °C, final temperature 80 °C, and the supplied constant α is 0.000012 per K. Expansion is unrestrained. This model does not specify anchors, stresses, joints or compensators. Calculate the length increase in mm. Keep intermediate values unrounded; round the final result to four decimal places if necessary.