Civil Engineering MCQAE Level Civil Engineering
Kern (core) of a cross-section in prestressed concrete is:
RCCPrestressed ConcreteMEDIUM
Choose the correct answer
A
The central 1/3 of the section
B
Region within which prestress must be applied to keep entire section in compression
C
The centroid point only
D
The plastic neutral axis zone
Correct Answer
B. Region within which prestress must be applied to keep entire section in compression
Why is this the answer?
Kern: the area about the centroid within which a compressive load must be applied to avoid tension anywhere. For rectangular section: kern extends to ±L/6 from centroid (L=depth); for I-section: smaller kern.
Related RCC MCQs
More solved RCC questions for AE/JE Civil Engineering exams.
- The 'ductility' of RC structures is improved under earthquake loading by:
- For a circular RC water tank with rigid base, the hoop tension is maximum at:
- The 'end block' in a post-tensioned member is specially designed for:
- A 'shear wall' in a multi-storey RC building acts as:
- The 'minimum clear cover' for reinforcement in a RCC beam in severe exposure (IS 456) is:
- The 'torsion' in RC beams is resisted by:
Practice more Civil Engineering questions
This MCQ belongs to Magic Mock Test Series — UPSC ESE Civil (Paper II). Full tests include timed attempts, rank comparison and subject-wise analysis.