Question

Permanent dimension changes due to loading is termed as:

• A. Strain
• B. Extent
• C. Creep
• D. Ambit

Hint:

Creep is significant in materials like concrete and metals at high temperatures or under long-term loading.

Answer 1

The Correct Option is C

Step 1: Understand the term “permanent deformation.”
Permanent deformation refers to deformation that remains even after the removal of load.
Step 2: Definition of creep.
Creep is the time-dependent permanent deformation of a material when subjected to a constant load or stress over a long period of time.
Step 3: Analyze the options.
(A) Strain: Strain is a general measure of deformation and can be elastic or plastic, not necessarily permanent.
(B) Extent: Not a standard term used in strength of materials.
(C) Creep: Correct, as it represents permanent dimensional change under sustained loading.
(D) Ambit: Not related to deformation mechanics.
Step 4: Conclusion.
Therefore, permanent dimension change due to loading is called creep.