1. If the bond stress developed in a reinforced concrete beam is more than permissible value, it can be brought down by ?

increasing the depth of beam

increasing the number of bars

decreasing the diameter of the bars

all of these

Answer: all of these

Explanation:


2. The length of the staircase situated between two landings is called ?

rise

flight

tread

waist-slab

Answer: flight

Explanation:


3. The deep beams are designed for ?

shear force only

bending moment only

both shear force and bending moment

bearing

Answer: bending moment only

Explanation:


4. At a certain section, in a combined footing for two columns carrying unequal loads, the shear is zero. At this section ?

sagging moment is zero

sagging moment is maximum

hogging moment is zero

nogging moment is maximum

Answer: nogging moment is maximum

Explanation:


5. The application of elastic theory to the beams is based on the assumption that ?

at any cross-section, plane sections before bending remain plane after bending

all tensile stresses are taken up by reinforcement alone and none by the concrete

steel reinforcement is free from initial stresses when it is embedded in concrete

all of the above

Answer: all of the above

Explanation:


6. Doubly reinforced section is used ?

when the members are subjected to alternate external loads and the bending moment in the sections reverses

when the members are subjected to loading eccentric on either side of the axis

when the members are subjected to accidental lateral loads

all of the above

Answer: all of the above

Explanation:


7. For simply supported slabs spanning in one direction, the ratio of span to overall depth should not exceed ?

15

20

30

50

Answer: 30

Explanation:


8. The neutral axis of a balanced section is called ?

balanced neutral axis

critical neutral axis

equivalent neutral axis

all of these

Answer: critical neutral axis

Explanation:


9. A footing which supports two or more columns is termed as ?

combined footings

raft footing

strap footing

none of these

Answer: combined footings

Explanation:


10. The combined footing, in the longitudinal direction, will have ?

sagging bending moment in the two cantilever portions

hogging bending moment in some length of middle portion

either (a) or (b)

both (a) and (b)

Answer: both (a) and (b)

Explanation: