In a singly reinforced beam (A) Compression is borne entirely by concrete (B) Steel possesses initial stresses when embedded in concrete (C) Plane sections transverse to the centre line of the beam before bending remain plane after bending (D) Elastic moduli for concrete and steel have different values within the limits of deformation of the beam

In a singly reinforced beam
(A) Compression is borne entirely by concrete
(B) Steel possesses initial stresses when embedded in concrete
(C) Plane sections transverse to the centre line of the beam before bending remain plane after
bending
(D) Elastic moduli for concrete and steel have different values within the limits of deformation
of the beam
by

1 Answer

Answer :

Answer: Option C
by

Related questions

The application of elastic theory to the beams is based on the assumption that (a) At any cross-section, plane sections before bending remain plane after bending (b) All tensile stresses are taken up by reinforcement alone and none by the concrete. (c) Steel reinforcement is free from initial stresses when it is embedded in concrete. (d) All of the above

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Last Answer : (d) All of the above

Pick up the assumption for the design of a pre-stressed concrete member from the following: (A) A transverse plane section remains a plane after bending (B) During deformation limits, Hook's law is equally applicable to concrete as well as to steel (C) Variation of stress in reinforcement due to changes in external loading is negligible (D) All the above

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Last Answer : Answer: Option D

In a singly reinforced concrete beam, as the load increases. (a) Only concrete will resist tension (b) Only steel bars will resist tension. (c) Both concrete and steel will resist tension. (d) Both concrete and steel will resist compression.

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Last Answer : (b) Only steel bars will resist tension.

In a singly reinforced concrete beam, if the load is vey small. (a) Only concrete will resist tension (b) Only steel bars will resist tension. (c) Both concrete & steel will resist tension. (d) Both concrete & steel will resist compression.

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Last Answer : (c) Both concrete & steel will resist tension.

The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called (A) Balanced sectionB) Economic section (C) Critical section (D) All the above

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The section of a reinforced beam where most distant concrete fiber in compression and tension in steel attains permissible stresses simultaneously is called (i)Balanced section (ii)Economic section (iii)Critical section [ A ] i [ B ] i and ii [ C ] i and iii [ D ] i, ii and iii

Description : The section of a reinforced beam where most distant concrete fiber in compression and tension in steel attains permissible stresses simultaneously is called (i)Balanced section (ii)Economic section (iii)Critical section [ A ] i [ B ] i and ii [ C ] i and iii [ D ] i, ii and iii

Last Answer : [ D ] i, ii and iii

If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is (A) 0.496 % (B) 0.596 % (C) 0.696 % (D) 0.796 %

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Steel Beam theory is the method of analysis and a design of [ A ] Singly reinforced sections [ B ] Doubly reinforced sections [ C ] Both (a) and (b) [ D ] Steel structures only

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Last Answer : [ B ] Doubly reinforced sections

Steel Beam theory is the method of analysis and a design of [ A ] Singly reinforced sections [ B ] Doubly reinforced sections [ C ] Both (a) and (b) [ D ] Steel structures only

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Last Answer : [ B ] Doubly reinforced sections

Steel Beam theory is a method of designing [ A ] Balanced sections [ B ] Critical sections [ C ] Singly reinforced beams [ D ] Doubly reinforced beams

Description : Steel Beam theory is a method of designing [ A ] Balanced sections [ B ] Critical sections [ C ] Singly reinforced beams [ D ] Doubly reinforced beams

Last Answer : [ D ] Doubly reinforced beams

In a singly reinforced beam, the effective depth is measured form the compression edge to the (a) Tensile edge (b) Centre of tensile reinforcement (c) Neutral axis of the beam (d) All of the above

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Select the incorrect statement from the following In eccentrically loaded columns, [ A ] The tensile strength of concrete is ignored [ B ] Design stress – strain curve for steel in compression is the same as in tension [ C ] The strain at different points in the section will be same [ D ] Plane section remain plane even after bending

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Last Answer : [ C ] The strain at different points in the section will be same

Pick up the correct assumption of the theory of simple bending (A) The value of the Young's modulus is the same in tension as well as in compression (B) Transverse section of a beam remains plane before and after bending (C) The material of the beam is homogeneous and isotropic (D) All the above

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In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called (A) Under-reinforced section (B) Over reinforced section (C) Economic section (D) Critical section

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Last Answer : Answer: Option B

A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is (A) 20 cm (B) 25 cm (C) 30 cm (D) 35 cm

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Last Answer : Answer: Option C

The effective depth of a singly reinforced rectangular beam is 300mm. the section is over-reinforced and the neutral axis is 120mm below the top. If the maximum stress attained by concrete is 5N/mn2 and the modular ratio is 18, then the stress developed in the steel will (a) 130N/mm2 (b) 135N/mm2 (c) 160N/mm2 (d) 180N/mm2

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In a singly reinforced beam, if the stress in concrete reaches its allowable limit later than the steel reaches, its permissible value, the beam section is said to be (a) Under-reinforced section (b) Over-reinforced section (c) Critical section (d) Balanced section

Description : In a singly reinforced beam, if the stress in concrete reaches its allowable limit later than the steel reaches, its permissible value, the beam section is said to be (a) Under-reinforced section (b) Over-reinforced section (c) Critical section (d) Balanced section

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In a singly reinforced beam, if the permissible stress in steel reaches earlier than that of concrete, the beam section as called [ A ] Under reinforced section [ B ] Over reinforced section [ C ] Balanced section [ D ] Critical section

Description : In a singly reinforced beam, if the permissible stress in steel reaches earlier than that of concrete, the beam section as called [ A ] Under reinforced section [ B ] Over reinforced section [ C ] Balanced section [ D ] Critical section

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In a Singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called [ A ] Under reinforced section [ B ] Over reinforced section [ C ] Balanced section [ D ] Critical section

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In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively (A) Compressive and tensile (B) Tensile and compressive (C) Both compressive (D) Both tensile

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A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n1. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is (A) bn (fc /2) (d - n/3) (B) Atft (d - n/3) (C) ½ n1 (1 - n1/3) cbd² (D) All the above

Description : A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n1. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is (A) bn (fc ... (B) Atft (d - n/3) (C) ½ n1 (1 - n1/3) cbd² (D) All the above

Last Answer : Answer: Option D

A pre-stressed concrete member (A) Is made of concrete (B) Is made of reinforced concrete (C) Is stressed after casting (D) Possesses internal stresses

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In a simple bending theory, one of the assumption is that the plane sections before bending remain plane after bending. This assumption means that a. stress is uniform throughout the beam b. strain is uniform throughout the beam c. stress is proportional to the distance from the neutral axis d. strain is proportional to the distance from the neutral axis

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Last Answer : d. strain is proportional to the distance from the neutral axis

If permissible working stresses in steel and concrete are respectively 1400 kg/cm2 and 80 kg/cm2 and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is (A) 37 cm (B) 38 cm (C) 39 cm (D) 40 cm

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Last Answer : Answer: Option D

If the depth of actual neutral axis of a doubly reinforced beam (A) Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier (B) Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier (C) Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously (D) All the above

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The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm2 respectively. If m = 15, the depth of its neutral axis is (A) 20 cm (B) 25 cm (C) 30 cm (D) 35 cm

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Last Answer : Answer: Option C

In a singly reinforced beam, the effective depth is measured from its compression edge to (A) Tensile edge (B) Tensile reinforcement (C) Neutral axis of the beam (D) Longitudinal central axis

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If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be (A) 0.35 d (B) 0.40 d (C) 0.45 d (D) Dependent on grade of concrete also

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Consider the following statements: Percentage of steel for balanced designed of a singly reinforced rectangular section by limit state method depends on (1) Characteristic strength of concrete (2) Yield strength of concrete (3) Modulus of elasticity of steel (4) Geometry of the section. Which of these statements are correct? (a) 2, 3 and 4 (b) 1, 3 and 4 (c) 1, 2 and 4 (d) 1, 2 and 3

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For an over –reinforced (singly reinforced )rectangular reinforced concrete section (a) The lever arm will be less than that for a balanced section (b) The maximum stress developed by concrete will be equal to allowable stress in concrete (c) The maximum stress developed by steel will be equal to the allowable (d) All the above

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Strain compatibility method is the method used for the analysis and design of [ A ] singly reinforced sections [ B ] doubly reinforced sections [ C ] both (a) and (b) [ D ] neither (a) nor (b)

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Strain compatibility method is the method used for the analysis and design of [ A ] singly reinforced sections [ B ] doubly reinforced sections [ C ] both (a) and (b) [ D ] neither (a) nor (b)

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A short column 20 cm × 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm2 and 300 kg/cm2 , the Safe load on the column, should not exceed (A) 4120 kg (B) 41,200 kg (C) 412,000 kg (D) None of these

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Last Answer : Answer: Option B

In a beam, the neutral plane (A) May be its centre (B) Passes through the C.G. of the area of cross-section (C) Does not change during deformation (D) None of these

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Pick up the correct statement from the following: (A) For channels, the shear centre does not coincide its centroid (B) The point of intersection of the bending axis with the cross section of the beam, is called shear centre (C) For I sections, the shear centre coincides with the centroid of the cross section of the beam (D) All the above

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Shear resistance of concrete in a reinforced concrete beam is dependent on (a) Tension reinforcement in the beam (b) Compression reinforcement in the beam (c ) Shear reinforcement in the beam (d) None of the reinforcements in the beam

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If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is (A) d (B) n (C) d + n/3 (D) d - n/3

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Last Answer : Answer: Option D

While compared with singly reinforced beams, the depth of doubly reinforced beam is [ A ] Greater [ B ] Lesser [ C ] almost equal [ D ] twice

Description : While compared with singly reinforced beams, the depth of doubly reinforced beam is [ A ] Greater [ B ] Lesser [ C ] almost equal [ D ] twice

Last Answer : [ B ] Lesser

In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to reach its permissible limit before to reach yield stress in steel [ C ] stresses in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

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Last Answer : [ A ] the stress in steel to reach its yield limit before concrete failure

In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to reach its permissible limit before to reach yield stress in steel [ C ] stresses in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

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Last Answer : [ A ] the stress in steel to reach its yield limit before concrete failure

According to the steel beam theory of doubly reinforced beams (A) Tension is resisted by tension steel (B) Compression is resisted by compression steel (C) Stress in tension steel equals the stress in compression steel (D) All the above

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Last Answer : Answer: Option D

In doubly reinforced rectangular beam, the allowatte stress in compression steel is___________the permissible stross intension insteel. (a) Greater than (b) Less than (c) Equal to (d) All of these

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In a doubly reinforced beam , steel reinforcement is provided in a (a) Tensile zone (b) Compression zone (c) Either (a) & (b) (d) Both (a) & (b)

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Last Answer : (d) Both (a) & (b)

In singly reinforced beams, steel reinforcement is provided in (a) Compressive zone (b) Tensile zone (c) Neutral zone (d) All the above

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Last Answer : (b) Tensile zone

Limiting moment of resistance of a singly reinforced section for mild steel is [ A ] Mu = 0.133 fck bd2 [ B ] Mu = 0.138 fck bd2 [ C ] Mu = 0.148 fck bd2 [ D ] Mu = 0.153 fck bd2

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Last Answer : [ C ] Mu = 0.148 fck bd2

Minimum percentage of tension steel for a singly reinforced section Fe415 grade is [ A ] 0.2 [ B ] 0.35 [ C ] 2 [ D ] 3.5

Description : Minimum percentage of tension steel for a singly reinforced section Fe415 grade is [ A ] 0.2 [ B ] 0.35 [ C ] 2 [ D ] 3.5

Last Answer : [ A ] 0.2

If the grade of steel is Fe250, then the expression for moment of resistance of a singly reinforced section is [ A ] 0.149 fck bd2 [ B ] 0.138 fck bd2 [ C ] 0.125 fck bd2 [ D ] 0.012 fck bd2

Description : If the grade of steel is Fe250, then the expression for moment of resistance of a singly reinforced section is [ A ] 0.149 fck bd2 [ B ] 0.138 fck bd2 [ C ] 0.125 fck bd2 [ D ] 0.012 fck bd2

Last Answer : [ A ] 0.149 fck bd2

The expression for moment of resistance(Mu) of a singly reinforced section is, if the grade of steel in Fe415 [ A ] 0.149 fck bd2 [ B ] 0.138 fck bd2 [ C ] 0.125 fck bd2 [ D ] 0.0120 fck bd2

Description : The expression for moment of resistance(Mu) of a singly reinforced section is, if the grade of steel in Fe415 [ A ] 0.149 fck bd2 [ B ] 0.138 fck bd2 [ C ] 0.125 fck bd2 [ D ] 0.0120 fck bd2

Last Answer : [ B ] 0.138 fck bd2

Minimum percentage of tension steel for a singly reinforced section Fe415 grade is [ A ] 0.2 [ B ] 0.35 [ C ] 2 [ D ] 3.5

Description : Minimum percentage of tension steel for a singly reinforced section Fe415 grade is [ A ] 0.2 [ B ] 0.35 [ C ] 2 [ D ] 3.5

Last Answer : [ A ] 0.2

If the grade of steel is Fe250, then the expression for moment of resistance of a singly reinforced section is [ A ] 0.149 fck bd2 [ B ] 0.138 fck bd2 [ C ] 0.125 fck bd2 [ D ] 0.012 fck bd2

Description : If the grade of steel is Fe250, then the expression for moment of resistance of a singly reinforced section is [ A ] 0.149 fck bd2 [ B ] 0.138 fck bd2 [ C ] 0.125 fck bd2 [ D ] 0.012 fck bd2

Last Answer : [ A ] 0.149 fck bd2