DRC-1

The grade of Concrete M25 TO M55

• Normal concrete
• Standard concrete
• High strength concrete
• Ultra high strength concrete

In RCC, tensile stress is denoted based on

• Yield strength of steel
• Yield strngth of concrete
• Ultimate Strength of steel
• Ultimate strength of concrete

Modular ratio is the ratio of modulus elasticity of

• Concrete to that of Steel
• Steel to that of Concrete
• Stress to that of Strain
• Strain to that of Stress

As per IS 456:2000, Minimum grade for plain concrete under mild exposure condition is

• M20
• M25
• M40
• Not specified

In Singly reinforced concrete beam, as the load increases

• Both concrete and steel bars will resist tension
• Both concrete and steel bars will resist compression
• Only steel bars will resist tension
• No response

The neutral axis of a balanced section is called..

• balanced neutral axis
• critical neutral axis
• lever arm
• equivalent neutral axis

Normally, the tensile strength of concrete is about ...... of its compressive strength

• 10% - 15%
• 25% - 30%
• 30% - 45%
• 40% - 45%

Moment of resistance of an under-reinforced section is computed on the basis of

• tensile force developed in steel
• tensile force developed in concrete
• tensile force developed in steel and Concrete
• None of the above

The percentage of steel in a beam increases, the depth of neutral axis

• decreases
• Increase
• Constant
• No change

The stress in concrete increases is direct proportional to....... in strain

• decrease
• Increase
• Constant
• No response