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

View solution

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

View solution

Q. What is the final setting time?

View solution

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

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. 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. What is the capacity of a measuring cylinder?

View solution

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

View solution

Q. Insoluble Residue mainly comes from which compound?

View solution

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

View solution

Q. C₄AF is not a true compound.

View solution

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

View solution

Q. Gypsum reacts with ____________ to form calcium sulfo aluminates and calcium sulfo ferrite.

View solution

Q. C₃S and C₂S require approximately the _____________ amount of water for hydration.

View solution