Civil Engineering MCQs

Page No. 294

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


a1:2


b1:3


c1:4


d1:6


View Answer 1:3

Gypsum consists of______________?


aH2S and C02


bCaS04 and H20


cLime and H20


dC02 and calcium


View Answer CaS04 and H20

The normal consistency of ordinary Portland cement is about________________?


a10%


b20%


c30%


d40%


View Answer 30%

After storage, the strength of cement________________?


adecreases


bincreases


cremains same


dmay increase or decrease


View Answer decreases

The slump recommended for mass concrete is about_______________?


a 25 mm to 50 mm


b50 mm to 100 mm


c100 mm to 125 mm


dv 125 mm to 150 mm


View Answer 25 mm to 50 mm

Addition of pozzolana to ordinary Portland cement increases__________________?


ableeding


bshrinkage


cpermeability


dheat of hydration


View Answer shrinkage

With increase in moisture content, the bulking of sand_______________?


aincreases


bdecreases


c first increases to a certain maximum value and then decreases


d first decreases to a certain minimum value and then increases



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


a7 MPa


b11.5 MPa


c16 MPa


d21 MPa


View Answer 16 MPa

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


agypsum


bfiner grinding


ctricalcium silicate


dtricalcium aluminate


View Answer finer grinding

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


a50 mm


b70.6 mm


c100 mm


d150 mm


View Answer 50 mm

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