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Concrete-structures Questions Set 9:

Quiz Mode

Which of the following is advantage of RCC?

Workable

Mould in any shape

Durable

All of the above

Solution:

Which type of concrete has high workability?

Self-compacting concrete

Plain concrete

Prestressed concrete

Lightweight concrete

Solution:

The limit of percentage of the longitudinal reinforcement in a column, as per IS: 456-2000, is

0.15% to 2%

0.8% to 4%

0.8% to 6%

0.8% to 8%

Solution:

The number of treads in a flight of stairs is equal to the number of _____.

risers minus one

risers plus three

risers plus one

risers in the flight

Solution:

The reduction coefficient of a reinforced concrete column with an effective length of 4.5 m and a cross-section of 200 × 250 mm is:

0.98

0.65

0.55

0.78

Solution:

A section having percentage of Steel greater than the critical steel percenatge is known as

Critical section

Balanced section

Over reinforced section

Under reinforced section

Solution:

For a beam of cross-section, width = 230 mm and effective depth = 500 mm, the number of rebars of 12 mm diameter required to satisfy minimum tension reinforcement specified by IS:456 2000 (assuming grade of steel reinforcement as Fe 500) is_____.

Solution:

As per the provision of IS 456-2000, in the limit state method for design of beams, the limiting value of depth of neutral axis in a reinforced concrete beam of effective depth ‘d’ is given as

0.53 d

0.48d

0.46d

Any of the above depending on the different grades of steel

Solution:

A singly reinforced rectangular concrete beam of width 300 mm and effective depth 400 mm is to be designed using M25 grade concrete and Fe 500 grade reinforcing steel. For the beam to be under-reinforced, the maximum number of 16 mm diameter reinforcing bars that can be provided is

Solution:

Two rectangular under-reinforced concrete beam sections X and Y are similar in all aspects except that the longitudinal compression reinforcement in section Y is

Section X has less flexural strength and is less ductile than section Y.

Section X has less flexural strength but is more ductile than section Y.

Section X and Y have equal flexural strength but different ductility.

Sections X and Y have equal flexural strength and ductility.

Concrete-structures Questions Set 9:

Which of the following is advantage of RCC?

Solution:

Which type of concrete has high workability?

Solution:

The limit of percentage of the longitudinal reinforcement in a column, as per IS: 456-2000, is

Solution:

The number of treads in a flight of stairs is equal to the number of _____.

Solution:

The reduction coefficient of a reinforced concrete column with an effective length of 4.5 m and a cross-section of 200 × 250 mm is:

Solution:

A section having percentage of Steel greater than the critical steel percenatge is known as

Solution:

For a beam of cross-section, width = 230 mm and effective depth = 500 mm, the number of rebars of 12 mm diameter required to satisfy minimum tension reinforcement specified by IS:456 2000 (assuming grade of steel reinforcement as Fe 500) is_____.

Solution:

As per the provision of IS 456-2000, in the limit state method for design of beams, the limiting value of depth of neutral axis in a reinforced concrete beam of effective depth ‘d’ is given as

Solution:

A singly reinforced rectangular concrete beam of width 300 mm and effective depth 400 mm is to be designed using M25 grade concrete and Fe 500 grade reinforcing steel. For the beam to be under-reinforced, the maximum number of 16 mm diameter reinforcing bars that can be provided is

Solution:

Two rectangular under-reinforced concrete beam sections X and Y are similar in all aspects except that the longitudinal compression reinforcement in section Y is

Solution:

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