০০। A circular slab subjected to external loading, deflects to form a
ক) semi-hemisphere
খ) ellipsoid
গ) parabolloid
ঘ) none of these.
০১। A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds
ক) 10
খ) 15
গ) 20
ঘ) 25
ঙ) 30
০২। A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is
ক) 2.5
খ) 2.0
গ) less than 2
ঘ) less than 2.5
০৩। A flat slab is supported
ক) on beams
খ) on columns
গ) on beams and columns
ঘ) on columns monolithicaily built with slab
ঙ) all the above
০৪। A foundation is called shallow if its depth, is
ক) one-fourth of its width
খ) half of its width
গ) three-fourth of its width
ঘ) equal to its width
ঙ) all the above.
০৫। A foundation rests on
ক) base of the foundation
খ) subgrade
গ) foundation soil
ঘ) both (b) and (c)
০৬। A part of the slab may be considered as the flange of the T-beam if
ক) flange has adequate reinforcement transverse to beam
খ) it is built integrally with the beam
গ) it is effectively bonded together with the beam
ঘ) all the above.
০৭। A per IS : 1343, total shrinkage for a pretensioned beam, is
ক) 3.0 x 10-2
খ) 3.0 x 10-3
গ) 3.0 x 10-4
ঘ) 3.0 x 10-5
ঙ) 3.5 x 10-5
০৮। 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
ক)
খ)
গ)
ঘ)
ঙ)
০৯। A pile of length L carrying a uniformly distributed load W per metre length is suspended at two points, the maximum, B.M. at the centre of the pile or at the points of suspension, is
ক)
খ)
গ)
ঘ)
ঙ)
১০। 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
ক)
খ)
গ)
ঘ)
১১। A pre-cast pile generally used, is
ক) circular
খ) square
গ) octagonal
ঘ) square with corners chamfered.
১২। A pre-stressed concrete member
ক) is made of concrete
খ) is made of reinforced concrete
গ) is stressed after casting
ঘ) possesses internal stresses.
১৩। A pre-stressed concrete member is preferred because
ক) its dimensions are not decided from the diagonal tensile stress
খ) large size of long beams carrying large shear force need not be adopted
গ) removal of cracks in the members due to shrinkage
ঘ) all the above.
১৪। 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
ক)
খ)
গ)
ঘ)
ঙ)
১৫। A raft foundation is provided if its area exceeds the plan area of the building by
ক) 10%
খ) 20%
গ) 30%
ঘ) 40%
ঙ) 50%
১৬। 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
ক) 30
খ) 35
গ) 40
ঘ) 45
ঙ) 50
১৭। A ribbed slab is provided for
ক) a plain ceiling
খ) thermal insulation
গ) acoustic insulation
ঘ) all the above.
১৮। A short column 20 cm x 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
ক) 4120 kg
খ) 41, 200 kg
গ) 412, 000 kg
ঘ) none of these.
১৯। 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