Civil Engineering Mcqs

The initial setting time for ordinary Portland cement as per IS specifications should not be less than_____________?

• (A)  10 minutes
• (B)  30 minutes
• (C)  60 minutes
• (D)  600 minutes

Answer

Submitted By :Ali Uppal

The most common admixture which is used to accelerate the initial set of concrete is______________?

• (A)  gypsum
• (B)  calcium chloride
• (C)  calcium carbonate
• (D)  none of the above

Answer

Submitted By :Ali Uppal

The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is_______________?

• (A)  1
• (B)  2
• (C)  3
• (D)  4

Answer

Submitted By :Ali Uppal

Which of the following cements is suitable for use in massive concrete structures such as large dams ?

• (A)  ordinary Portland cement
• (B)  low heat cement
• (C)  rapid hardening cement
• (D)  sulphate resisting cement

Answer

Submitted By :Ali Uppal

For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of___________________?

• (A)  1:2
• (B)  1:3
• (C)  1:4
• (D)  1:6

Answer

Submitted By :Ali Uppal

Gypsum consists of______________?

• (A)  H2S and C02
• (B)  CaS04 and H20
• (C)  Lime and H20
• (D)  C02 and calcium

Answer

Submitted By :Ali Uppal

The normal consistency of ordinary Portland cement is about________________?

• (A)  10%
• (B)  20%
• (C)  30%
• (D)  40%

Answer

Submitted By :Ali Uppal

After storage, the strength of cement________________?

• (A)  decreases
• (B)  increases
• (C)  remains same
• (D)  may increase or decrease

Answer

Submitted By :Ali Uppal

The slump recommended for mass concrete is about_______________?

• (A)  25 mm to 50 mm
• (B)  50 mm to 100 mm
• (C)  100 mm to 125 mm
• (D)  125 mm to 150 mm

Answer

Submitted By :Ali Uppal

Addition of pozzolana to ordinary Portland cement increases__________________?

• (A)  bleeding
• (B)  shrinkage
• (C)  permeability
• (D)  heat of hydration

Answer

Submitted By :Ali Uppal