# Concrete Technology MCQs with Answers – Set 13

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## Q1. According to IS: 4561978, minimum slenderness ratio for a short column is

(A) Less than 12
(B) Less than 18
(C) Between 18 and 24
(D) More than 24

## Q2. Sinking of an intermediate support of a continuous beam(i) Reduces the negative moment at support(ii) Increases the negative moment at support(iii) Reduces the positive moment at center of span(iv) Increases the positive moment at center of spanThe correct answer is

(A) (i) and (iii)
(B) (i) and (iv)
(C) (ii) and (iii)
(D) (ii) and (iv)

(A) 3.5 m
(B) 4 m
(C) 4.5 m
(D) 5 m

## Q4. Water cement ratio is

(A) Volume of water to that of cement
(B) Weight of water to that of cement
(C) Weight of concrete to that of water
(D) Both (a) and (b) of the above

Answer: (D) Both (a) and (b) of the above

## Q5. High temperature

(A) Increases the strength of concrete
(B) Decreases the strength of concrete
(C) Has no effect on the strength of concrete
(D) None of these

Answer:(B) Decreases the strength of concrete

## Q6. The bulk density of aggregates does not depend upon:

(A) Size and shape of aggregates
(B) Specific gravity of aggregates
(D) Size and shape of the container

Answer: (D) Size and shape of the container

(A) 10 kg
(B) 12 kg
(C) 14 kg
(D) 16 kg

## Q8. Horizontal construction joints in concrete walls are generally provided at

(A) Soffit level
(B) Window sill level
(C) Floor level
(D) All the above

(A) 7 days
(B) 14 days
(C) 21 days
(D) 28 days

(A) l/3
(B) l/5
(C) l/7
(D) l/10

## Q11. Stress strain curve of high tensile steel

(A) Has a definite yield point
(B) Does not show definite yield point but yield point is defined by 0.1% proof stress
(C) Does not show definite yield point but yield point is defined by 0.2% proof stress
(D) Does not show definite yield point but yield point is defined by 2% proof stress

Answer:(C) Does not show definite yield point but yield point is defined by 0.2% proof stress

## Q12. A higher modular ratio shows

(A) Higher compressive strength of concrete
(B) Lower compressive strength of concrete
(C) Higher tensile strength of steel
(D) Lower tensile strength of steel

Answer: (B) Lower compressive strength of concrete

## Q13. Pick up the incorrect statement from the following:

(A) In properly graded aggregates, bulk density is more
(B) In single size aggregates, bulk density is least
(C) In single size aggregates, bulk density is maximum
(D) None of these

Answer: (C) In single size aggregates, bulk density is maximum

## Q14. Addition of pozzolana to cement causes

(A) Reduction in permeability
(B) Loss of heat of hydration
(C) Reduction in bleeding
(D) All the above