Civil Engineering MCQJE Level Civil Engineering
IS 456 Table 5 specifies the minimum cement content for M25 concrete in moderate exposure as:
RCCRCCMEDIUM
Choose the correct answer
A
200 kg/m³
B
300 kg/m³ for M25 in moderate exposure
C
400 kg/m³
D
No minimum specified for M25
Correct Answer
B. 300 kg/m³ for M25 in moderate exposure
Why is this the answer?
IS 456 Table 5: For Moderate exposure, M25 concrete: min cement = 300 kg/m³, max w/c = 0.50. For Severe: min 320 kg/m³, w/c 0.45 for M30. For Very severe: 340 kg/m³, w/c 0.45, M35. For Extreme: 360 kg/m³, w/c 0.40, M40. Minimum cement ensures durability not just strength.
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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