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Free download in PDF RCC Structures Design Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
The spacing of transverse reinforcement of column is decided by the following consideration.
[A]
The least lateral dimension of the column
[B]
Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column
[C]
Forty-eight times the diameter of transverse reinforcement
[D]
All the above
(22)
A pre-cast pile generally used, is
[A]
Circular
[B]
Square
[C]
Octagonal
[D]
Square with corners chamfered
Answer: Square with corners chamfered
(23)
The neutral axis of a T-beam exists
[A]
Within the flange
[B]
At the bottom edge of the slab
[C]
Below the slab
[D]
All the above
(24)
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
[A]
Safe in shear
[B]
Is safe with stirrups
[C]
Is safe with stirrups and inclined members
[D]
Needs revision of the section
(25)
The design of heel slab of a retaining wall is based on the maximum bending moment due to:
[A]
Its own weight
[B]
Weight of the soil above it
[C]
Load of the surcharge, if any
[D]
All the above
(26)
The minimum thickness of a flat slab is taken
[A]
L/32 for end panels without drops
[B]
L/36 for end panels without drops
[C]
L/36 for interior panels without drop
[D]
All the above
(27)
The minimum clear cover for R.C.C. columns shall be
[A]
Greater of 40 mm or diameter
[B]
Smaller of 40 mm or diameter
[C]
Greater of 25 mm or diameter
[D]
Smaller of 25 mm or diameter
Answer: Greater of 25 mm or diameter
(28)
An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus
[A]
Triangular load of the wall
[B]
UDL of wall
[C]
UDL of wall + load from the roof
[D]
Triangular load + load from the roof
Answer: UDL of wall + load from the roof
(29)
In a pre-stressed member it is advisable to use
[A]
Low strength concrete only
[B]
High strength concrete only
[C]
Low strength concrete but high tensile steel
[D]
High strength concrete and high tensile steel
Answer: High strength concrete and high tensile steel
(30)
If C is creep coefficient, f is original pre-stress 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:
[A]
(1 – C) mf – eE
[B]
(C – 1)mf + eE
[C]
(C – 1)mf – eE
[D]
(1 – C)mf + eE
31
Is the pre- stressed force applied to tendon of a rectangular pre-stressed beam whose area of
cross section is and sectional modulus is . The minimum stress on the beam subjected to a
maximum bending moment is
[A]
f = (P/A) – (Z/M)
[B]
f = (A/P) – (M/Z)
[C]
f = (P/A) – (M/Z)
[D]
f = (P/A) – (M/6Z)
Answer: f = (P/A) – (M/Z)
32
For M 150 grade concrete (1:2:4) the moment of resistance factor is
[A]
0.87
[B]
8.50
[C]
7.50
[D]
5.80
33
Top bars are extended to the projecting parts of the combined footing of two columns Ldistance apart for a distance of
[A]
0.1 L from the outer edge of column
[B]
0.1 L from the centre edge of column
[C]
Half the distance of projection
[D]
One -fourth the distance of projection
Answer: 0.1 L from the centre edge of column
34
The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of
[A]
10 mm
[B]
15 mm
[C]
20 mm
[D]
25 mm
35
Steel bars are generally connected together to get greater length than the standard length by providing
[A]
Straight bar splice
[B]
Hooked splice
[C]
Dowel splice
[D]
All the above
36
Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam
[A]
Are curtailed if not required to resist the bending moment
[B]
Are bent up at suitable places to serve as shear reinforcement
[C]
Are bent down at suitable places to serve as shear reinforcement
[D]
Are maintained at bottom to provide at least local bond stress
Answer: Are bent down at suitable places to serve as shear reinforcement
37
The maximum permissible size of aggregates to be used in casting the ribs of a slab, is
[A]
5 mm
[B]
7.5 mm
[C]
10 mm
[D]
15 mm
38
mutually perpendicular principal stresses acting on a soil mass, the normal stress
If p1 and p2 are
[A]
[(p – p p p to the principal plane carrying the principal stress p1, is:sin 2
[B]
[(p – p p p cos 2
[C]
[(p p p – p cos 2
[D]
[(p p p – p /2] sin 2
Answer: [(p p p – p cos 2
39
longitudinal bars and lateral stirrups, is
[A]
Stress in concrete × area of concrete
[B]
Stress in steel × area of steel
[C]
Stress in concrete × area of concrete + Stress in steel × area of steel
[D]
None of these
Answer: Stress in concrete × area of concrete + Stress in steel × area of steel
40
To ensure uniform pressure distribution, the thickness of the foundation, is
[A]
Kept uniform throughout
[B]
Increased gradually towards the edge
[C]
Decreased gradually towards the edge
[D]
Kept zero at the edge
Answer: Decreased gradually towards the edge
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