Download PDF
Free download in PDF RCC Structures Design Short 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.
41
Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds
[A]
50 cm
[B]
75 cm
[C]
100 cm
[D]
120 cm
42
If is the sectional area of a pre-stressed rectangular beam provided with a tendon pre -stressed
by a force through its centroidal longitudinal axis, the compressive stress in concrete, is
[A]
P/A
[B]
A/P
[C]
P/2A
[D]
2A/P
43
Enlarged head of a supporting column of a flat slab is technically known as
[A]
Supporting end of the column
[B]
Top of the column
[C]
Capital
[D]
Drop panel
44
The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.
[A]
m = 700/3C
[B]
m = 1400/3C
[C]
m = 2800/3C
[D]
m = 3500/3C
45
If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is
[A]
0.496 %
[B]
0.596 %
[C]
0.696 %
[D]
0.796 %
46
If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of
weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the
earth, is )/(1 + sin )]
[A]
h = (W/Aw) [(1 –
[B]
h = (W/Aw) [(1 + )/(1 + sin )]
[C]
h = (W/Aw) [(1 – )/(1 + sin )]²
[D]
h W/Aw) [(1 – )/(1 + sin )]²
Answer: h = (W/Aw) [(1 – )/(1 + sin )]²
47
High strength concrete is used in pre-stressed member
[A]
To overcome high bearing stresses developed at the ends
[B]
To overcome bursting stresses at the ends
[C]
To provide high bond stresses
[D]
All the above
48
The pitch of the main bars in a simply supported slab, should not exceed its effective depth by
[A]
Three times
[B]
Four times
[C]
Five times
[D]
Six times
49
Long and short spans of a two way slab are l and l and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. Accordingy to xRankine Grashoff theory
[A]
(wx/wy) = (ly/lx)
[B]
(wx/wy) = (ly/lx)²
[C]
(wx/wy) = (ly/lx)4
[D]
None of these
Answer: (wx/wy) = (ly/lx)4
50
The transverse reinforcements provided at right angles to the main reinforcement
[A]
Distribute the load
[B]
Resist the temperature stresses
[C]
Resist the shrinkage stress
[D]
All the above
51
In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2, nominal reinforcement is provided at a pitch of
[A]
One -half lever arm of the section
[B]
One-third lever arm of the section
[C]
Lever arm of the section
[D]
One and half lever arm of the section
Answer: Lever arm of the section
52
If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is
[A]
[( – )/2] h
[B]
[( + )/4] h
[C]
[( + )/2] h
[D]
( – h
53
If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width
[A]
R + T
[B]
T – R
[C]
2 + T2)
[D]
R – T
54
In a simply supported slab, alternate bars are curtailed at
[A]
1/4th of the span
[B]
1/5th of the span
[C]
1/6th of the span
[D]
1/7th of the span
Answer: 1/7th of the span
55
After pre-stressing process is completed, a loss of stress is due to
[A]
Shrinkage of concrete
[B]
Elastic shortening of concrete
[C]
Creep of concrete
[D]
All the above
56
If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is
[A]
D = 0.0775 a
[B]
D = 0.775 a
[C]
D = 0.775 a
[D]
D = 0.775 a2
57
Pick up the incorrect statement from the following:
[A]
In the stem of a retaining wall, reinforcement is provided near the earth side
[B]
In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab
[C]
In the heel slab of a retaining wall, reinforcement is provided at the top of the slab
[D]
None of these
58
The self-weight of the footing, is
[A]
Not considered for calculating the upward pressure on footing
[B]
Also considered for calculating the upward pressure on footing
[C]
Not considered for calculating the area of the footing
[D]
Both B. and C.
Answer: Not considered for calculating the upward pressure on footing
59
A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is
[A]
WL/P
[B]
WL/2P
[C]
WL/3P
[D]
WL/4P
60
The minimum head room over a stair must be
[A]
200 cm
[B]
205 cm
[C]
210 cm
[D]
230 cm
Take Mock Tests