430 + Mcqs in RCC Structures Design Page 6 McqOptions

251.	An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is__________________?
A.	300 cm
B.	233 cm
C.	176 cm
D.	236 cm
Answer» D. 236 cm

Discussion

252.	After pre-stressing process is completed, a loss of stress is due to______________?
A.	Shrinkage of concrete
B.	Elastic shortening of concrete
C.	Creep of concrete
D.	All the above
Answer» E.

Discussion

253.	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
Answer» E.

Discussion

254.	According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is_____________?
A.	5 kg/cm2
B.	10 kg/cm 2
C.	15 kg/cm2
D.	20 kg/cm2
Answer» B. 10 kg/cm 2

Discussion

255.	According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is______________?
A.	Half of the width of the slab
B.	Two -third of the width of the slab
C.	Three-fourth of the width of the slab
D.	Four-fifth of the width of the slab
Answer» D. Four-fifth of the width of the slab

Discussion

256.	According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?
A.	5 cm
B.	10 cm
C.	15 cm
D.	20 cm
Answer» D. 20 cm

Discussion

257.	According to I.S. 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?
A.	20 cm
B.	30 cm
C.	40 cm
D.	75 cm
Answer» C. 40 cm

Discussion

258.	A very comfortable type of stairs is_______________?
A.	Straight
B.	Dog legged
C.	Geometrical
D.	Open newel
Answer» E.

Discussion

259.	A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis______________?
A.	Remains within the flange
B.	Remains below the slab
C.	Coincides the geometrical centre of the beam
D.	None of these
Answer» B. Remains below the slab

Discussion

260.	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
Answer» D. 35 cm

Discussion

261.	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
Answer» E.

Discussion

262.	A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is___________________?
A.	14 cm 2
B.	15 cm2
C.	16 cm2
D.	17 cm2
Answer» D. 17 cm2

Discussion

263.	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
Answer» C. 412,000 kg

Discussion

264.	A ribbed slab is provided for______________?
A.	A plain ceiling
B.	Thermal insulation
C.	Acoustic insulation
D.	All the above
Answer» E.

Discussion

265.	A retaining wall and is the horizontal earth pressure, the factor of safety If is weight of against sliding, is_____________?
A.	1.0
B.	1.25
C.	1.5
D.	2.0
Answer» D. 2.0

Discussion

266.	A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is___________________?
A.	30
B.	35
C.	40
D.	45
Answer» D. 45

Discussion

267.	A raft foundation is provided if its area exceeds the plan area of the building by______________?
A.	10 %
B.	20 %
C.	40 %
D.	50 %
Answer» E.

Discussion

268.	A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is_____________________?
A.	WL/P
B.	WL/2P
C.	WL/3P
D.	WL/4P
Answer» D. WL/4P

Discussion

269.	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
Answer» E.

Discussion

270.	A pre-stressed concrete member is preferred because___________________?
A.	Its dimensions are not decided from the diagonal tensile stress
B.	Large size of long beams carrying large shear force need not be adopted
C.	Removal of cracks in the members due to shrinkage
D.	All the above
Answer» E.

Discussion

271.	A pre-cast pile generally used, is______________?
A.	Circular
B.	Square
C.	Octagonal
D.	Square with corners chamfered
Answer» E.

Discussion

272.	A part of the slab may be considered as the flange of the T-beam if__________________?
A.	Flange has adequate reinforcement transverse to beam
B.	It is built integrally with the beam
C.	It is effectively bonded together with the beam
D.	All the above
Answer» E.

Discussion

273.	[A + (m – 1)ASC] known as equivalent concrete area of R.C.C. is given by______________?
A.	Modular ratio method
B.	Load factor method
C.	Ultimate load method
D.	None of these
Answer» B. Load factor method

Discussion

274.	A foundation rests on_______________?
A.	Base of the foundation
B.	Sub-grade
C.	Foundation soil
D.	Both B. and C
Answer» E.

Discussion

275.	A foundation is called shallow if its depth, is________________?
A.	One-fourth of its width
B.	Half of its width
C.	Three-fourth of its width
D.	Equal to its width
Answer» E.

Discussion

276.	A flat slab is supported_______________?
A.	On beams
B.	On columns
C.	On beams and columns
D.	On columns monolithically built with slab
Answer» E.

Discussion

277.	A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is______________?
A.	2.5
B.	2.0
C.	Less than 2
D.	Less than 2.5
Answer» B. 2.0

Discussion

278.	A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds_________________?
A.	10
B.	15
C.	20
D.	25
Answer» C. 20

Discussion

279.	A circular slab subjected to external loading, deflects to form a_________________?
A.	Semi-hemisphere
B.	Ellipsoid
C.	Paraboloid
D.	None of these
Answer» D. None of these

Discussion

280.	If bending moment is M, shear force is F effecive depth is d, lever arm is la area of reinforcement is As and sum of the circumferences of main reinforcement is 0, the bond stress based on working stress method, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

281.	If jd is the lever arm and ΣO is the total perimeter of reinformcement of an R.C.C. beam, the bond stress at the section having Q shear force, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

282.	If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm2, the length of the beam having nominal reinforcement, is
A.	4 cm
B.	6 m
C.	8 m
D.	10 m
Answer» D. 10 m

Discussion

283.	An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm φ placed symmetrically along the circumference. If it carries a load of 40, 000 kg axially, the stress is
A.	49.9 kg/cm2
B.	100 kg/cm2
C.	250 kg/cm2
D.	175 kg/cm2
Answer» B. 100 kg/cm2

Discussion

284.	If k is wobble correction factor, μ is coefficient of friction between the duct surface and the curve of tendon of radius R, the tension ratio at a distance x from either end, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

285.	A prestressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

286.	If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the prestressed beam is L, the upward uniform pressure will be
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» C. [C].

Discussion

287.	In a prestressed beam carrying an external load W with a bent tendon is having angle of inclination θ and prestressed load P. The net downward load at the centre is
A.	W - 2P cos θ
B.	W - P cos θ
C.	W - P sin θ
D.	W - 2P sin θ
E.	W + 2P sin θ
Answer» E. W + 2P sin θ

Discussion

288.	P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross section is A and sectional modulus is Z. The minimum stress f on the beam subjected to a maximum bending moment M is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

289.	If A is the sectional area of a prestressed rectangular beam provided with a tendon prestressed by a force P through its centroidal longitudinal axis, the compressive stress in concrete, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» B. [B].

Discussion

290.	P is the prestressed force applied to the tendon of a rectangular prestressed beam whose area of cross section is A and sectional modulus is Z. The maximum stress f in the beam, subjected to a maximum bending moment M, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

291.	For stairs spanning l metres longitudinally between supports at the bottom and top of a flight carrying a load w per unit horizontal area, the maximum bending moment per metre width, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» F.

Discussion

292.	If longitudinally spanning stairs are casted along with their landings, the maximum bending moment per metre width, is taken as
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» C. [C].

Discussion

293.	To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» E. [E].

Discussion

294.	If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

295.	If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a superload on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

296.	The Total pressure on the vertical face of a retaining wall of height h exerted by the retained earth weighing w per unit volume having an angle of surcharge α°, is :
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

297.	Total pressure on the vertical face of a retaining wall of height h per unit run exerted by the retained earth weighing w per unit volume, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

298.	If p1 and p2 are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle θ° to the principal plane carrying the principal stress p1, is :
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

299.	A pile of length L carrying a uniformly distributed load W per metre length is suspended at the centre and from other two points 0.15 L from either end ; the maximum hogging moment will be
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» E. [E].

Discussion

300.	A pile weighing W1 kg penetrates S metres with its last blow. If W2 is the weight of the hammer having a drop of H metres, the pile can carry a maximum external load
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» C. [C].

Discussion

Explore topic-wise MCQs in Civil Engineering.

An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is__________________?

After pre-stressing process is completed, a loss of stress is due to______________?

According to the steel beam theory of doubly reinforced beams______________?

According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is_____________?

According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is______________?

According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?

According to I.S. 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?

A very comfortable type of stairs is_______________?

A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis______________?

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 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 simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is___________________?

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 ribbed slab is provided for______________?

A retaining wall and is the horizontal earth pressure, the factor of safety If is weight of against sliding, is_____________?

A raft foundation is provided if its area exceeds the plan area of the building by______________?

A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is_____________________?

A pre-stressed concrete member__________________?

A pre-stressed concrete member is preferred because___________________?

A pre-cast pile generally used, is______________?

A part of the slab may be considered as the flange of the T-beam if__________________?

[A + (m – 1)ASC] known as equivalent concrete area of R.C.C. is given by______________?

A foundation rests on_______________?

A foundation is called shallow if its depth, is________________?

A flat slab is supported_______________?

A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is______________?

A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds_________________?

A circular slab subjected to external loading, deflects to form a_________________?

If bending moment is M, shear force is F effecive depth is d, lever arm is la area of reinforcement is As and sum of the circumferences of main reinforcement is 0, the bond stress based on working stress method, is

If jd is the lever arm and ΣO is the total perimeter of reinformcement of an R.C.C. beam, the bond stress at the section having Q shear force, is

If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm2, the length of the beam having nominal reinforcement, is

An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm φ placed symmetrically along the circumference. If it carries a load of 40, 000 kg axially, the stress is

If k is wobble correction factor, μ is coefficient of friction between the duct surface and the curve of tendon of radius R, the tension ratio at a distance x from either end, is

A prestressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is

If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the prestressed beam is L, the upward uniform pressure will be

In a prestressed beam carrying an external load W with a bent tendon is having angle of inclination θ and prestressed load P. The net downward load at the centre is

P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross section is A and sectional modulus is Z. The minimum stress f on the beam subjected to a maximum bending moment M is

If A is the sectional area of a prestressed rectangular beam provided with a tendon prestressed by a force P through its centroidal longitudinal axis, the compressive stress in concrete, is

P is the prestressed force applied to the tendon of a rectangular prestressed beam whose area of cross section is A and sectional modulus is Z. The maximum stress f in the beam, subjected to a maximum bending moment M, is

For stairs spanning l metres longitudinally between supports at the bottom and top of a flight carrying a load w per unit horizontal area, the maximum bending moment per metre width, is

If longitudinally spanning stairs are casted along with their landings, the maximum bending moment per metre width, is taken as

To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than

If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is

If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a superload on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is

The Total pressure on the vertical face of a retaining wall of height h exerted by the retained earth weighing w per unit volume having an angle of surcharge α°, is :

Total pressure on the vertical face of a retaining wall of height h per unit run exerted by the retained earth weighing w per unit volume, is

If p1 and p2 are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle θ° to the principal plane carrying the principal stress p1, is :

A pile of length L carrying a uniformly distributed load W per metre length is suspended at the centre and from other two points 0.15 L from either end ; the maximum hogging moment will be

A pile weighing W1 kg penetrates S metres with its last blow. If W2 is the weight of the hammer having a drop of H metres, the pile can carry a maximum external load