Civil Engineering MCQJE Level Civil Engineering
M20 grade concrete with OPC has a 28-day characteristic cube compressive strength of:
RCCRCCEASY
Choose the correct answer
A
20 MPa cube strength (characteristic, 28 days)
B
20 MPa cylinder strength
C
20 MPa at 7 days
D
20 kPa
Correct Answer
A. 20 MPa cube strength (characteristic, 28 days)
Why is this the answer?
The designation M20 directly means fck = 20 N/mm² (MPa) from 150 mm cubes at 28 days. M stands for mix and the number is the characteristic strength. M20 is the minimum grade for reinforced concrete in mild exposure per IS 456.
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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