## RCC Structures Design MCQ Practice Questions (Civil Eng) Set 3

##### A part of the slab may be considered as the flange of the T-beam if:

Options are :

• All the above
• It is effectively bonded together with the beam
• Flange has adequate reinforcement transverse to beam
• It is built integrally with the beam

Options are :

• 20 mm
• 30 mm
• 15 mm
• 25 mm
• 10 mm

Options are :

• 150 cm
• 300 cm
• 100 cm
• 200 cm

##### An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is:

Options are :

• Is safe with stirrups
• Is safe with stirrups and inclined members
• Needs revision of the section
• Safe in shear

##### If the shear stress in a R.C.C. beam is:

Options are :

• All the above
• Greater than 20 kg/cm^(2), the size of the section is changed
• Greater than 4 kg/cm^(2), but less than 20 kg/cm^(2), shear reinforcement is provided
• Equal or less than 5 kg/cm^(2), no shear reinforcement is provided

##### If the loading on a prestressed rectangular beam, is uniformly distributed, the tendon to be provided should be:

Options are :

• None of these
• Parabolic with convexity downward
• Parabolic with convexity upward
• Straight below centroidal axis
• Straight above centroidal axis

##### A foundation is called shallow if its depth, is:

Options are :

• Half of its width
• All the above
• Three-fourth of its width
• Equal to its width
• One-fourth of its width

##### If the size of a column is reduced above the floor, the main bars of the columns, are:

Options are :

• Continued up
• Stopped just below the floor level and separate lap bars provided
• Bent inward at the floor level
• All the above

Options are :

• B
• A
• D
• E
• C

##### In a combined footing if shear stress does not exceed 5 kg/cm^(2), the nominal stirrups provided are:

Options are :

• 10 legged
• 12 legged
• 6 legged
• 8 legged
• None of these

##### The thickness of the flange of a Tee beam of a ribbed slab is assumed as:

Options are :

• Twice the width of the rib
• Thickness of the concrete topping 0d) half the thickness of the rib
• Width of the rib
• Depth of the rib

Answer :Thickness of the concrete topping 0d) half the thickness of the rib

Options are :

• 140 cm
• 80 cm
• 150 cm
• 100 cm
• 120 cm

Options are :

• E
• A
• D
• B
• C

##### In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength:

Options are :

• 200 kg/cm^(2)
• 500 kg/cm^(2)
• 100 kg/cm^(2)
• 300 kg/cm^(2)
• 400 kg/cm^(2)

##### The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as:

Options are :

• C.C.L. standard system
• Freyssinet system
• Lee-McCall system
• Magnel-Blaton system

##### If C is creep coefficient, f is original prestress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

Options are :

• (C - 1)mf - eE
• (1 - C)mf - eE
• (1 - C)mf + eE
• (C - 1)mf + eE

Answer :(C - 1)mf + eE

##### An R.C.C. roof slab is designed as a two way slab if:

Options are :

• It supports live loads in both directions
• The slab is discontinuous at edges
• The ratio of spans in two directions is less than 2
• The slab is continuous over two supports

Answer :The ratio of spans in two directions is less than 2

Options are :

• A
• B
• D
• E
• C

##### The anchorage value of a hook is assumed sixteen times the diameter of the bar if the angle of the bend, is:

Options are :

• 30°
• 60°
• 40°
• 45°
• All the above

##### The live load to be considered for an accessible roof, is:

Options are :

• 150 kg/m^(2)
• 200 kg/cm^(2)
• Nil
• 75 kg/m^(3)

Options are :

• D
• C
• A
• B

##### The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or:

Options are :

• 36 bar diameters
• 24 bar diameters
• 18 bar diameters
• 12 bar diameters
• 30 bar diameters

##### In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at:

Options are :

• A point of the maximum shear force
• A point equidistant from either column
• A point of zero shear force

Answer :A point of zero shear force

##### A flat slab is supported:

Options are :

• All the above
• On beams and columns
• On columns monolithicaily built with slab
• On columns
• On beams

Answer :On columns monolithicaily built with slab

##### A circular slab subjected to external loading, deflects to form a:

Options are :

• Ellipsoid
• Semi-hemisphere
• None of these
• Parabolloid

Options are :

• A
• D
• E
• B
• C

Options are :

• 7 mm
• 8 mm
• 5 mm
• 4 mm
• 6 mm

Options are :

• A
• D
• C
• B
• E

Options are :

• 54.5
• 55.5
• 52.5
• 53.5
• 51.5

Options are :

• D
• B
• C
• A