Limit State Method

Q. Limit state of serviceability for deflection including the effects due to creep, shrinkage and temperature occurring after erection of partitions and application of finishes as applicable to floors and roofs is restricted to

1. $\frac{Span}{150}$
2. $\frac{Span}{200}$
3. $\frac{Span}{250}$
4. $\frac{Span}{350}$

Q. Unequal top and bottom reinforcement in a reinforced concrete section leads to

1. creep deflection
2. shrinkage deflection
3. long-term deflection
4. large deflection

Q. According to the concept of Limit State Design as per IS 456-2000, the probability of failure of a structure is ________.

1. 0.0975

Q. Working stress method of design for reinforced concrete is

1. not a limit state design
2. a serviceability limit state design
3. a limit state for crack width
4. a collapse limit state

Q. In the limit state method of design, the failure criterion for reinforced concrete beams and columns is

1. maximum principal stress theory
2. maximum principal strain theory
3. maximum shear stress theory
4. maximum strain energy theory

Q. Beam sections of reinforced concrete designed in accordance with ultimate strength or limit state design approach, as compared to sections designed by working stress method for the same conditions of load and span, and the same width, usually have

1. a larger depth and smaller amount of reinforcement
2. the same depth and same reinforcement
3. smaller depth and more reinforcement
4. same depth as that of a deep beam

Q. As compared to the working stress method of design, the limit state method of design premises that the concrete can admit

1. A lower stress level
2. A higher stress level
3. Occasionally higher, but usually lower, stress level
4. Only the same stress level

Q. Which one of the following states falls under the 'Limit state of Serviceability' as per IS -456?

1. Stability under load
2. Loss for equilibrium of a structure
3. Floor vibration
4. Formation of mechanism

Q. In case of a composite construction, the effect of creep and shrinkage

1. can be ignored even at the limit state of serviceability
2. can be ignored at the ultimate limit state due to large inelastic strains induced
3. can be completely eliminated if the props are removed after 28 days
4. in the in-situ concrete has no interaction on the stresses in the pre-cast component at any stage

Q. Match List-I with List-II and select the correct answer using the codes given below the lists:
List-I List-II
A. Serviceability 1. Sliding
B. Shear key 2. Deflection
C. Shrinkage 3. Cracking
D. Concrete spalling 4. Corrosion

Codes:
$ABCD$

1. $1342$
2. $2134$
3. $1324$
4. $2143$

Q. Beam sections of reinforced concrete designed in accordance with ultimate strength or limit state design approach, as compared to sections designed by working stress method for the same conditions of load and span, and the same width, usually have

1. a larger depth and smaller amount of reinforcement
2. the same depth and same reinforcement
3. smaller depth and more reinforcement
4. same depth as that of a deep beam

Q. In reinforced brickwork slabs, the diameter of main reinforcement shall, preferably not exceed

1. 8 mm
2. 10 mm
3. 12 mm
4. 16 mm