Civil Engineering Mcqs

Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth ?

• (A)  lime stone and alumina
• (B)  silica and alkalies
• (C)  alumina and iron
• (D)  alkalies and magnesium

Answer

Submitted By :Ali Uppal

According to IS specifications, the compressive strength of ordinary portland cement after three days should not be less than________________?

• (A)  7 MPa
• (B)  11.5 MPa
• (C)  16 MPa
• (D)  21 MPa

Answer

Submitted By :Ali Uppal

Early attainment of strength in rapid hardening cement is mainly due to_______________?

• (A)  gypsum
• (B)  finer grinding
• (C)  tricalcium silicate
• (D)  tricalcium aluminate

Answer

Submitted By :Ali Uppal

For testing compressive strength of cement, the size of cube used is_______________?

• (A)  50 mm
• (B)  70.6 mm
• (C)  100 mm
• (D)  150 mm

Answer

Submitted By :Ali Uppal

The main constituent of cement which is responsible for initial setting of cement is_________________?

• (A)  dicalcium silicate
• (B)  tricalcium silicate
• (C)  tricalcium aluminate
• (D)  all of the above

Answer

Submitted By :Ali Uppal

The main constituent which imparts hydraulicity to hydraulic lime is______________?

• (A)  calcium oxide
• (B)  silica
• (C)  clay
• (D)  water

Answer

Submitted By :Ali Uppal

Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below ?

• (A)  Both A and R are true and R is correct explanation of A
• (B)  Both A and R are true and R is not a correct explanation of A
• (C)  A is true but R is false
• (D)  A is false but R is true

Answer

Submitted By :Ali Uppal

Study the following statements. (1) Hydraulic lime is suitable for white washing, (2) Fat lime is suitable for whitewashing, (3) Hydraulic lime is suitable for making mortar, (4) Fat lime is suitable for making mortar. The correct answer is______________?

• (A)  (1) and (4)
• (B)  (2) and (3)
• (C)  (1) and (2)
• (D)  (3) and (4)

Answer

Submitted By :Ali Uppal

As per IS specifications, the maximum final setting time for ordinary Portland cement should be_______________?

• (A)  30 minutes
• (B)  1 hour
• (C)  6 hours
• (D)  10 hours

Answer

Submitted By :Ali Uppal

The constituent of cement which is responsible for all the undesirable properties of cement is____________?

• (A)  dicalcium silicate
• (B)  tricalcium silicate
• (C)  tricalcium aluminate
• (D)  tetra calcium alumino ferrite

Answer

Submitted By :Ali Uppal