Home
Current Affairs January 2024

What is the correct answer?

4

Gypsum is added for

A. Colour

B. Strength

C. Controlling setting time

D. None of these

Correct Answer :

C. Controlling setting time


Related Questions

What is the correct answer?

4

A flaky aggregate is said to be elongated if its length is

A. Equal to the mean size

B. Twice the mean size

C. Thrice the mean size

D. Four times the mean size

What is the correct answer?

4

Shrinkage of concrete depends upon
(i) Humidity of atmosphere
(ii) Passage of time
(iii) Stress The correct answer is

A. (i) and (ii)

B. (ii) and (iii)

C. Only (iii)

D. All (i), (ii) and (iii)

What is the correct answer?

4

Air entrainment in the concrete increases

A. Workability

B. Strength

C. The effects of temperature variations

D. The unit weight

What is the correct answer?

4

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

What is the correct answer?

4

When shear stress exceeds the permissible limit in a slab, then it is reduced by

A. Increasing the depth

B. Providing shear reinforcement

C. Using high strength steel

D. Using thinner bars but more in number

What is the correct answer?

4

The depth of footing for an isolated column is governed by (i) Maximum bending moment (ii) Shear force (iii) Punching shear The correct answer is

A. Only (i)

B. (i) and (ii)

C. (i) and (iii)

D. All (i), (ii) and (iii)

What is the correct answer?

4

To ensure constant moisture content in aggregates

A. Area of each aggregate pile should be large

B. Height of each aggregate pile should not exceed 1.50 m

C. Aggregate pile should be left for 24 hours before aggregates are used

D. All the above

What is the correct answer?

4

Permissible compressive strength of M 150 concrete grade is

A. 100 kg/cm2

B. 150 kg/cm2

C. 200 kg/cm2

D. 250 kg/cm2

What is the correct answer?

4

The slab is designed as one way if the ratio of long span to short span is

A. Less than 1

B. Between 1 and 1.5

C. Between 1.5 and 2

D. Greater than 2

What is the correct answer?

4

Non-uniform compaction may cause the concrete

A. Porous

B. Non-homogeneous

C. Reduced strength

D. All the above

What is the correct answer?

4

Bulking of sand is maximum if moisture content is about

A. 2 %

B. 4 %

C. 6 %

D. 10 %

What is the correct answer?

4

Pick up the incorrect statement from the following:

A. The bottom and top ends of slump mould are parallel to each other

B. The axis of the mould is perpendicular to the end faces

C. The internal surface of the mould is kept clean and free from set cement

D. The mould is in the form of a frustum of hexagonal pyramid

What is the correct answer?

4

Minimum grade of concrete to be used in reinforced concrete as per IS: 4561978 is

A. M 15

B. M 20

C. M 10

D. M 25

What is the correct answer?

4

The bulk density of aggregates does not depend upon:

A. Size and shape of aggregates

B. Specific gravity of aggregates

C. Grading of aggregates

D. Size and shape of the container

What is the correct answer?

4

Separation of coarse aggregates from mortar during transportation, is known

A. Bleeding

B. Creeping

C. Segregation

D. Shrinkage

What is the correct answer?

4

For an ordinary Portland cement

A. Residual does not exceed 10% when sieved through IS Sieve No. 9

B. Soundness varies from 5 to 10 mm

C. Initial setting time is not less than 30 minutes

D. Compressive stress after 7 days, is not less than 175 kg/cm2

What is the correct answer?

4

According to IS : 382-1963, a good aggregate should be

A. Chemically inert

B. Sufficiently strong

C. Hard and durable

D. All the above

What is the correct answer?

4

According to Whitney's theory, ultimate strain of concrete is assumed to be

A. 0.03 %

B. 0.1 %

C. 0.3 %

D. 3 %

What is the correct answer?

4

M 150 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

What is the correct answer?

4

The strength and quality of concrete, depend upon:

A. Grading of aggregates

B. Surface area of aggregates

C. Shape of aggregates

D. All the above

What is the correct answer?

4

The individual variation between test strength of sample should not be more than

A. ± 5 % of average

B. ± 10 % of average

C. ± 15 % of average

D. ± 20 % of average

What is the correct answer?

4

For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is

A. 10 kg

B. 12 kg

C. 14 kg

D. 16 kg

What is the correct answer?

4

Pick up the incorrect statement from the following:

A. The degree of grinding of cement, is called fineness

B. The process of changing cement paste into hard mass, is known as setting of cement

C. The phenomenon by virtue of which cement does not allow transmission of sound, is known as soundness of cement

D. The heat generated during chemical reaction of cement with water, is known as heat of hydration

What is the correct answer?

4

Select the incorrect statement

A. Lean mixes bleed more as compared to rich ones.

B. Bleeding can be minimized by adding pozzolana finer aggregate

C. Bleeding can be increased by addition 'of calcium chloride

D. None of the above

What is the correct answer?

4

Shrinkage in concrete can be reduced by using

A. Low water cement ratio

B. Less cement in the concrete

C. Proper concrete mix

D. All the above

What is the correct answer?

4

Allowable shear strength of concrete, depends upon

A. Shear strength

B. Tensile strength

C. Compressive strength

D. None of these

What is the correct answer?

4

Slump test of concrete is a measure of its

A. Consistency

B. Compressive strength

C. Tensile strength

D. Impact value

What is the correct answer?

4

A T-shaped retaining wall mainly consists of

A. One cantilever

B. Two cantilevers

C. Three cantilevers

D. Four cantilevers

What is the correct answer?

4

Workability of concrete mix with low water cement ratio is determined by

A. Tensile strength test

B. Slump test

C. Compaction factor test

D. Flexural strength test

What is the correct answer?

4

The limits of percentage p of the longitudinal reinforcement in a column is given by

A. 0.15% to 2%

B. 0.8% to 4%

C. 0.8% to 6%

D. 0.8% to 8%