Home
Current Affairs January 2024

What is the correct answer?

4

The grade of concrete M 150 means that compressive strength of a 15 cm cube after 28 days, is

A. 100 kg/cm2

B. 150 kg/cm2

C. 200 kg/cm2

D. 250 kg/cm2

Correct Answer :

B. 150 kg/cm2


Related Questions

What is the correct answer?

4

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

What is the correct answer?

4

For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory

A. Is always less than 1

B. Is always greater than 1

C. Can be more than 1

D. Can be less than 1

What is the correct answer?

4

Modulus of elasticity of steel as per IS: 4561978 shall be taken as

A. 20 kN/cm²

B. 200 kN/cm²

C. 200 kN/mm²

D. 2 × 106 N/cm²

What is the correct answer?

4

In case of hand mixing of concrete, the extra cement to be added is

A. 5 %

B. 10 %

C. 15 %

D. 20 %

What is the correct answer?

4

Maximum percentage reinforcement in case of slabs is limited to

A. 2

B. 4

C. 6

D. 8

What is the correct answer?

4

Pozzolana cement is used with confidence for construction of

A. Dams

B. Massive foundations

C. R.C.C. structures

D. All the above

What is the correct answer?

4

If a beam fails in bond, then its bond strength can be increased most economically by

A. Increasing the depth of beam

B. Using thinner bars but more in number

C. Using thicker bars but less in number

D. Providing vertical stirrups

What is the correct answer?

4

In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on

A. Front face only

B. Inner face only

C. Both front face and inner face

D. None of the above

What is the correct answer?

4

The produce impermeable concrete

A. Thorough mixing of concrete is required

B. Proper compaction of concrete is required

C. Proper curing of concrete is required

D. All the above

What is the correct answer?

4

Pick up the correct statement from the following:

A. The quality of water governs the strength of concrete

B. 10% excess of water reduces the strength of concrete by 15%

C. 30% excess of water reduces the strength of concrete by 50%

D. All the above

What is the correct answer?

4

The void ratio of

A. Single size coarse aggregate is roughly 0.45

B. Graded coarse aggregate is roughly 0.040

C. Fine aggregate is roughly 0.45

D. All the above

What is the correct answer?

4

The grade of concrete not recommended by I.S. : 456, is

A. M 100

B. M 200

C. M 300

D. M 500

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

The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known

A. Grading

B. Curing

C. Mixing

D. Batching

What is the correct answer?

4

Most common method of pre-stressing used for factory production is

A. Long line method

B. Freyssinet system

C. Magnel-Blaton system

D. Lee-Macall system

What is the correct answer?

4

The type of aggregates of same nominal size, which contain less voids when compacted, are

A. Rounded spherical

B. Irregular

C. Flaky

D. None of these

What is the correct answer?

4

For construction of structures in sea water, the cement generally preferred to, is

A. Portland-pozzolana cement

B. Quick setting cement

C. Low heat Portland cement

D. Rapid hardening cement

What is the correct answer?

4

Pick up the incorrect statement applicable to the field test of good cement.

A. When one thrusts one's hand into a bag of cement, one should feel warm

B. The colour of the cement is bluish

C. By rubbing cement in between fingers, one should feed rough

D. All the above

What is the correct answer?

4

In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on

A. The front face in one direction

B. The front face in both directions

C. The inner face in one direction

D. The inner face in both directions

What is the correct answer?

4

During erection, the pile of length l is supported by a crane at a distance of

A. 0.207 l

B. 0.293 l

C. 0.707 l

D. 0.793 l From the driving end of pile which rests on the ground

What is the correct answer?

4

If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,

A. 20 %

B. 25 %

C. 30 %

D. 35 %

What is the correct answer?

4

According to the recommendations of IS : 456-1978, the expansion joints

A. Are provided where plane changes abruptly

B. Are provided to ensure minimum resistance

C. Do not carry reinforcement across them

D. All the above

What is the correct answer?

4

The final operation of finishing floors, is known as

A. Screeding

B. Floating

C. Trowelling

D. Finishing

What is the correct answer?

4

As compared to ordinary Portland cement, high alumina cement has

A. Higher initial setting time but lower final setting time

B. Lower initial setting time but higher final setting time

C. Higher initial and final setting times

D. Lower initial and final setting times

What is the correct answer?

4

Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is

A. 30 %

B. 40 %

C. 50 %

D. 60 %

What is the correct answer?

4

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

What is the correct answer?

4

Approximate value of shrinkage strain in concrete, is

A. 0.003

B. 0.0003

C. 0.00003

D. 0.03

What is the correct answer?

4

The datum temperature for maturity by Plowman, is

A. 23°C

B.

C. - 5.6°C

D. - 11.7°C

What is the correct answer?

4

The commonly used material in the manufacture of cement is

A. Sand stone

B. Slate

C. Lime stone

D. Graphite

What is the correct answer?

4

The bulk density of aggregates, depends upon

A. Shape

B. Grading

C. Compaction

D. All the above