21.

22.

23.

24.

25.

26.

27.

28.

As per IS 2386 : Part IV, after applying 15 blows in the impact testing machine, the crushed

aggregate is sieved through ————— sieve in the aggregate impact test.
(A) 125mm (B) 10mm
(0) 4.75mm (D) 2.36 mm

Average 28 days compressive strength of concrete cubes prepared with water proposed to be

used shall not be less than ——————% of the average strength similar concrete cubes
prepared with distilled water.

(^) 45 (B) 67

(© 85 (D) 90

The liquid substance which holds the ingredients of a paint in suspension is called :
(^) Base (B)_ Vehicle
(C) Thinner (D) Varnish

Which compound in cement hydration is mainly responsible for the initial set and early
strength of concrete?

(^) Tricalcium silicate (8) Tricalcium aluminate

(0 Dicalcium silicate (7) Tetra calcium alumino silicate

According to IS 456:2000, the slump value for mass concreting should be between :
(A) 0-25 mm (B) 25 mm-75 mm
(0 50mm-75 mm (D) 75 mm-100 mm

Vee-Bee Consistometer test is used to determine the :
(A) Soundness of concrete (B) Permeability of concrete

(C) Consistency of concrete (D) Workability of concrete

In the classification of coastal regulatory zones, area between high tide and low tide lines are
categorized under :

ಉ काका (8) ೮೫೫.11
(© करना (D) CRZ-IV

The total covered area of a building measured at the floor level of any given floor, which
includes the thickness of the outer walls, projections, balconies etc., is :

(A) Carpet area (B)_ Floor Area
(C) Plinth Area (D) Usable Area

162/2023 6 A