Concrete as a Construction Material Quiz

What does the grade of concrete represent?

• Its flexibility during construction

• Its tensile strength after 28 days

• Its compressive strength after 28 days

• Its weight after curing

How is the grade of concrete denoted?

• By a color code

• By a symbol followed by a number

• By a number followed by a letter

• By a letter followed by a number

Which of the following is classified as High-Strength Concrete?

• M20

• M30

• M60

• M10

What is the compressive strength of M20 concrete?

• 10 N/mm²

• 20 N/mm²

• 30 N/mm²

• 40 N/mm²

Which type of concrete is used for plain concrete works?

• High-Strength Concrete

• Ordinary Concrete

• Reinforced Concrete

• Standard Concrete

What is one advantage of concrete?

• High flexibility

• High tensile strength

• Fire resistance

• Low weight

What is a disadvantage of concrete?

• High cost

• Lightweight

• Low tensile strength

• High maintenance

Which concrete grade is the minimum for RCC works?

• M10

• M20

• M30

• M40

What is the typical curing time for concrete to achieve full strength?

• 7 days

• 14 days

• 28 days

• 21 days

Which application requires M50 concrete or above?

• Road pavements

• Bridges

• Dams

• House slabs