Concrete Fundamentals Quiz

What is the primary material used to make concrete?

• Cement

• Wood

• Steel

• Plastic

Which property of concrete allows it to be molded into various shapes?

• Resistance to fire

• High compressive strength

• Pliability when mixed

• Durability

What is the typical compressive strength range for most concrete structures?

• 10 to 20 MPa

• 30 to 50 MPa

• 50 to 70 MPa

• 70 to 100 MPa

What is the main function of gypsum in cement?

• To increase strength

• To retard premature hardening

• To improve workability

• To enhance color

Which of the following is a common cement extender?

• Water

• Gravel

• Fly Ash

• Sand

What is the role of water in fresh concrete?

• To reduce workability

• To act as a chemical reagent

• To increase density

• To enhance color

What is the maximum allowable chloride concentration in mixing water for reinforced concrete?

• 2000 mg/l

• 1000 mg/l

• 500 mg/l

• 4500 mg/l

What is the term for the reaction of cement compounds with water?

• Curing

• Hydration

• Calcination

• Setting

Which compound in Portland cement is responsible for early strength development?

• Tetra calcium alumina ferrite

• Di calcium silicate

• Tri calcium aluminate

• Tri calcium silicate

What is the effect of using too much water in a concrete mix?

• Improved workability

• Increased strength

• Reduced porosity

• Increased permeability