Beams and Slabs

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1. A doubly reinforced beam is considered less economical than a singly reinforced beam because

A) tensile steel required is more than that of the balanced section
B) shear reinforcement is more
C) concrete is not stressed to its full value
D) compressive steel is under stressed

... Answer is D


 

2. the maximum percentage of moment redistribution allowed in RCC beams is

A) 10%
B) 20%
C) 30%
D) 40%

... Answer is C

 

3. partial safety factor for concrete and steel are 1.5 and 1.15 respectively, because

A) concrete is heterogeneous and steel is homogeneous
B) the control on the quality of concrete is not as good as that of steel
C) concrete is weeker in tension
D) voids in concrete are 0.5% while those in steel are 0.15%

... Answer is B

 

4. a reinforced concrete slab is 75 mm thick.The maximum size of reinforcement bar that can be used is of

A) 12 mm dia
B) 10 mm dia
C) 8 mm dia
D) 6 mm dia

... Answer is C

 

5. in case of two way slab, the limiting deflection of the slab is

A) primarily a function of the long span
B) primarily a function of the short span
C) independent of long span or short span
D) depend on both long and short span

... Answer is B

 

6. the maximum depth of neutral axis for a beam with d as the effective depth, in limit state method of design for Fe415 steel is

A) 0.46d
B) 0.48d
C) 0.50d
D) 0.53d

... Answer is B

 

7. in a cantilever beam carrying gravity load, main reinforcemnt is provided

A) above the neutral axis
B) as vertical stirrups
C) as a helical reinforcement
D) below the neutral axis

... Answer is A 

 

8. usually stiffness of a simply supported beam is satisfied if the ratio of its span to depth does not exceed which one of the following

A) 7
B) 10
C) 20
D) 26

... Answer is C

 

9. how is the deflection in beams controlled as per IS:456

A) by using large aspect ratio
B) by using small modular ratio
C) by controlling span/depth ratio
D) by moderating water cemnt ratio

... Answer is C

 

10. what is the adoptable maximum spacing between vertical stirrups in an RCC beam of rectangular cross section having an effective depth of 300 mm?

A) 300mm
B) 275mm
C) 250mm
D) 225mm

... Answer is D
maximum spacing 0.75d
 

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