Civil Engineering MCQJE Level Civil Engineering
The 'nominal cover' to outermost reinforcement in RC columns for 'moderate' exposure (IS 456) is:
RCCRCCMEDIUM
Choose the correct answer
A
10 mm
B
30 mm for moderate exposure — IS 456 Table 16
C
25 mm
D
60 mm
Correct Answer
B. 30 mm for moderate exposure — IS 456 Table 16
Why is this the answer?
IS 456 Table 16: nominal cover for different exposure conditions. Mild: 20 mm (footings 40 mm); Moderate: 30 mm (columns 30 mm, beams 30 mm); Severe: 45 mm; Very severe: 50 mm; Extreme: 75 mm. Cover = distance from concrete surface to outermost bar face. Purpose: corrosion protection, fire resistance, bond. Durability minimum cover often governs over structural minimum.
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:
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