Concrete Technology and RCC Design MCQ – Set 15

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Q1. Pick up the correct statement from the following:

(A) According to the petrological characteristics, concrete aggregates are classified as heavy weight, normal weight and light weight
(B) According to the shape of the particles, concrete aggregates are classified as rounded irregular, angular and flaky
(C) According to the surface texture of the particles, the concrete aggregates are classified as glassy, smooth, granular, rough, crystalline, honey combed and porous
(D) All the above

Answer: (D) All the above

Q2. While compacting the concrete by a mechanical vibrator, the slump should not exceed

(A) 2.5 cm
(B) 5.0 cm
(C) 7.5 cm
(D) 10 cm

Answer: (B) 5.0 cm

Q3. You are asked to construct a massive dam, the type of cement you will use, is

(A) Ordinary Portland cement
(B) Rapid hardening cement
(C) Low heat cement
(D) Blast furnace slag cement

Answer: (C) Low heat cement

Q4. Pick up the correct statement from the following:

(A) The concrete gains strength due to hydration of cement
(B) The concrete does not set at freezing point
(C) The strength of concrete increases with its age
(D) All the above

Answer: (D) All the above

Q5. Non-uniform compaction may cause the concrete

(A) Porous
(B) Non-homogeneous
(C) Reduced strength
(D) All the above

Answer: (D) All the above

Q6. An ideal ware house, is provided

(A) Water proof masonry walls
(B) Water proof roof
(C) Few windows which remain generally closed
(D) All the above

Answer: (D) All the above

Q7. The critical section for finding maximum bending moment for footing under masonry wall is located

(A) At the middle of the wall
(B) At the edge of the wall
(C) Halfway between the middle and edge of the wall
(D) At a distance equal to effective depth of footing from the edge of the wall

Answer: (C) Halfway between the middle and edge of the wall

Q8. Modulus of rupture of concrete is a measure of

(A) Flexural tensile strength
(B) Direct tensile strength
(C) Compressive strength
(D) Split tensile strength

Answer: (A) Flexural tensile strength

Q9. Normally pre-stressing wires are arranged in the

(A) Upper part of the beam
(B) Lower part of the beam
(C) Center
(D) Anywhere

Answer: (B) Lower part of the beam

Q10. Separation of water or water sand cement from a freshly concrete, is known

(A) Bleeding
(B) Creeping
(C) Segregation
(D) Flooding

Answer: (A) Bleeding

Q11. M10 grade of concrete approximates

(A) 1 : 3 : 6 mix
(B) 1 : 1 : 2 mix
(C) 1 : 2 : 4 mix
(D) 1 : 1.5 : 3 mix

Answer: (A) 1 : 3 : 6 mix

Q12. Pick up the correct statement from the following:

(A) Bulking of sand is caused due to formation of a thin film of surface moisture
(B) Fine sand bulks more than coarse sand
(C) The volume of fully saturated sand, is equal to the volume of dry and loose sand
(D) All the above

Answer:(D) All the above

Q13. On a grading curve, the gap grading is represented by

(A) A horizontal line
(B) A vertical line
(C) N.W. inclined line
(D) N.E. inclined line

Answer: (A) A horizontal line

Q14. Higher workability of concrete is required if the structure is

(A) Made with cement concrete
(B) Thick and reinforced
(C) Thin and heavily reinforced
(D) Thick and heavily reinforced

Answer: (D) Thick and heavily reinforced

Q15. The minimum percentage of chemical ingredient of cement is that of

(A) Magnesium oxide
(B) Iron oxide
(C) Alumina
(D) Lime

Answer: (A) Magnesium oxide

Concrete Technology and Design MCQ with Answers

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