Civil Engineering MCQAE Level Civil Engineering
Free thermal expansion of bar (length L, coefficient α, rise ΔT):
Strength of MaterialsFree Thermal ExpansionEASY
Choose the correct answer
A
αΔT
B
LαΔT
C
LαΔT/E
D
EαΔT
Correct Answer
B. LαΔT
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Free expansion δ=L×α×ΔT; thermal strain=αΔT (no stress if unconstrained).
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