Reinforcement Cement Concrete (General Engineering) (SSC JE)

Total Questions: 56

11. In an under-reinforced beam- [JSSC JE (GEN. ENGG)-2017 ]

Correct Answer: (a) the depth of neutral axis is less than the maximum depth of neutral axis
Solution:

12. What is the recommended mix for the construction of long span arches? [JSSC JE (GEN. ENGG)-2017]

Correct Answer: (a) 1:1:2
Solution:

13. What is the assumed maximum strain in concrete for limit state of collapse in flexure? [JSSC JE (GEN. ENGG)-2017 ]

Correct Answer: (a) 0.0035
Solution:

As per IS 456-2000, cl. 38.1– the maximum strain in concrete at the outer most compression fiber is taken as 0.0035 in bending.
• The maximum strain in tension reinforcement in the section at failure shall not be less than

14. The minimum shear reinforcement is provided in a beam if: [JSSC JE (GEN. ENGG)-2017 ]

Correct Answer: (a) nominal shear stress is less than the design shear strength of concrete
Solution:

If nominal shear stress is less than design shear strength than minimum shear reinforcement is provided.
Minimum shear reinforcement

15. The value of load which has a 95% probability of NOT being exceeded during the life time of the structure is known as [JSSC JE (GEN. ENGG)-2017]

Correct Answer: (a) characteristic load
Solution:

As per IS 456:2000 cl-36.2–
Characteristic load–It means that the value of load which has a 95% probability of not being exceeded during the life of structure.

16. In columns when both ends are restrained against translation and rotation, the effective length is/ [JSSC JE (GEN. ENGG)-2017]

Correct Answer: (d) 0.65L
Solution:

17. As per IS: 456-2000, partial safety factor for Dead Load in limit state of collapse for load combination DL+LL is: [JSSC JE (GEN. ENGG)-2017]

OR
The value of partial safety factor in limit state of collapse for the combination of dead and live load is:

Correct Answer: (a) 1.5
Solution:

18. For a 45° cranked or bent up bar the additional length for one bent up is [JSSC JE (GEN. ENGG)-2017 ]

Correct Answer: (b) 0.42 d
Solution:

19. Grades of Concrete in Indian Standard Code are specified and designated by [JSSC JE (GEN. ENGG)-2017]

Correct Answer: (a) mix
Solution:

Concrete mix design is the process of selecting suitable ingredients of concrete and determining their relative amounts with the objective of producing a concrete of the required workability, strength and durability as economically as possible.

20. Doubly reinforced sections are generally adopted when [JSSC JE (GEN. ENGG)-2017 ]

Correct Answer: (a) design moments exceed the moment of resistance of singly reinforced section
Solution:

Doubly reinforced sections are generally adopted when design moments exceed the moment of resistance.
• Double reinforced section is also provided to reduce deflection (long term) due to creep and shrinkage.
• Doubly reinforced section required for dynamic loading or stress reversal condition.