Q. On cooling below 1250°C, C₃S decomposes ____________

View solution

Q. C₄AF is not a true compound.

View solution

Q. Loss on Ignition (L.O.I.) is the loss in weight of cement after being heated to _____________

View solution

Q. Insoluble Residue mainly comes from which compound?

View solution

Q. Portland cement is composed of four major oxides (CaO, SiO₂, Al₂O₃, Fe₂O₃ ≥90%).

View solution

Q. What is the capacity of a measuring cylinder?

View solution

Q. If t1=Time at which water is first added to cement, t2=Time when needle fails to penetrate 5 mm to 7 mm from bottom of the mould, t3=Time when the needle makes an impression but the attachment fails to do so, then what is final setting time?

View solution

Q. If t1=Time at which water is first added to cement, t2=Time when needle fails to penetrate 5 mm to 7 mm from bottom of the mould, t3=Time when the needle makes an impression but the attachment fails to do so, then what is initial setting time?

View solution

Q. Initial setting time of Low Heat Cement should not be less than _____________

View solution

Q. What is the final setting time?

View solution

Q. In the soundness test, the whole assembly is immersed in water for _______

View solution

Q. Final setting time of cement should not be more than _______

View solution

Q. Initial setting time of OPC should not be less than ___________

View solution

Q. What is the initial setting time?

View solution

Q. In cement hardening process ___________ instants are very important.

View solution

Q. The relative humidity of laboratory should be ___________ for standard consistency.

View solution

Q. What is the normal consistency for OPC?

View solution

Q. For making cement paste, what is the amount of water we need?

View solution

Q. Calculate standard consistency(%) when 100 ml of water is added in 1000 g of cement.

View solution

Q. Standard consistency of cement is tested by ___________

View solution