MCQ 1 The practical limit of moisture content achieved in dry dying of timber is

(A) 5 % (B) 15 % (C) 25 % (D) 35 %

MCQ 2 A splitting tensile test is performed on a cylinder of diameter “D” and length “L”, is the ultimate load is “p”, then the splitting tensile strength of concrete is given by

(A) P/πDL (B) 2P/πDL (C) 4Pl/μD³ (D) 2PD/πD³

MCQ 3 Le chatelier’s device is used for determining the

(A) Setting time of cement (B) Soundness of cement (C) Tensile strength of cement (D) Compressive strength of cement

MCQ 4 The Main ingredients of Portland cement are

(A) Lime and silica (B) Lime and alumina (C) Silica and alumina (D) Lime and iron

MCQ 14 Addition of pozzolona to ordinary Portland cement increase

(A) Bleeding (B) Shrinkage (C) Permeability (D) Heat of hydration

MCQ 13 The most commonly used retarder in cement is

(A) Gypsum (B) Calcium chloride (C) Calcium carbonate (D) None of the above

MCQ 5 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 these

MCQ 12 According to IS specifications, the compressive strength of ordinary Portland cement after three days should be less than

(A) 7 MPa (B) 11.5 MPa (C) 26 MPa (D) 21 MPa

MCQ 6 The initial setting time for ordinary Portland cement as per IS specifications should be less than

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

MCQ 11 The main constituent which imparts hydraulicity to hydraulic lime is

(A) Calcium oxide (B) Silica (C) Clay (D) Water

MCQ 7 Hydraulic lime is obtained by

(A) Burning of lime stone (B) Burning of kankar (C) Adding water to quick lime (D) Calcinations of pure clay

MCQ 8 Quick lime is

(A) Calcium carbonate (B) Calcium oxide (C) Calcium hyrdroxide (D) None of these

MCQ 9 To make 1 cubic meter of 1:2 by volume concrete, the volume of course aggregates required is

(A) 0.95 m³ (B) 0.85 m³ (C) 0.75 m³ (D) 0.65 m³

MCQ 15 Putty is made up of

(A) White lead and turpentine (B) Powered chalks and raw linseeds oil (C) Red lead and linseed oil (D) Zinc oxide and boiled linseed oil

MCQ 10 The compacting factor test of cement concrete determines its

(A) Strength (B) Porosity (C) Degree of compaction under loads (D) Workability