WorksheetsSDD III prelim (online)
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
Which of these is the time dependend loss?
a)
Loss due to elastic shortening
b)
Loss due to friction
c)
Loss due to relaxation of strands
d)
Loss due to anchorage slip
2.
A uniformly distributed load intensity, w acting on a simply supported prestressed concrete beam od span L, producing a bending moment M, at mid-span is be balanced by a parabolic tendon with zero eccentricity at ends and eccentricity e, at mid span. The pretsressing force required depends on
a)
w and e
b)
w and L
c)
L and e
d)
M and e
3.
IS: 1343-1980 limits the minimum characteristic strength of pre-stredded concrete for post tensioned work and pretensioned work as
a)
25 Mpa and 30 Mpa resp.
b)
25 Mpa and 35 Mpa resp.
c)
30 Mpa and 35 Mpa resp.
d)
30 Mpa and 40 Mpa resp.
4.
A concrete beam of rectangular cross section of 200 mm x 400 mm is prestressed with a force 400 KN at eccentricity 100 mm. the maximum compressive stress in the concrete is
a)
12.5 Mpa
b)
7.5 Mpa
c)
5 Mpa
d)
2.5 Mpa
5.
Method of prestressing used to cast railway sleepers is
a)
Pre-tensioning
b)
Post-tensioning
c)
both 1 and 2
d)
None of these
6.
Stress at the bottom edge of a simply supported beam corresponding to the cracking moment is called
a)
Modulus of rupture
b)
modulus of elasticity
c)
characteristic compressive strength
d)
utimate tensile strength
7.
End zone reinforcement in post-tensioning is provided to resist
a)
Spalling force
b)
Bursting force
c)
Tensile stress
d)
All of the above
8.
Bursting force in Post-tensioned concrete
a)
decreases with increase in size of bearing plate
b)
increases with increase in size of bearing plate
c)
independent of size of bearing plate
d)
All of the above
9.
In post-tensioned system, end block is the region between end of beam and the section where
a)
no lateral stresses exist
b)
only shear stress exist
c)
shear stress are maximum
d)
only longitudinal stresses exist
10.
The end zone reinforcement is provided
a)
upto y0
b)
upto 1.5y0
c)
between 0.10 to 0.90 y0
d)
depth of beam
11.
the prestressed slab withuot beam and column drop is called as
a)
flat slab
b)
flat plate
c)
waffle slab
d)
prestressed slab
12.
the method of analysis used for flat slab analysis is
a)
Sesmic coefficient method
b)
Direct Design method
c)
IS code method
d)
Approximate method
13.
Flat slab is especially used for
a)
Longer spans
b)
Shorter span
c)
cantilever span
d)
intermideate span
14.
Usually the depth of column drop is taken not less than ___
a)
1/3 rd of depth of slab
b)
1/4th of depth of slab
c)
1/5th of depth of slab
d)
1/6th of depth of slab
15.
Which of the following is not the assumption of DDM
a)
Slab should be continuous having more than four panels
b)
span length shuold be uniform
c)
multiple offsets of columns are not allowed
d)
None of these
16.
The retailing wall shown in fig is
a)
Gravity retaining wall
b)
Counterfort retaining wall
c)
Cantilever retaining wall
d)
None of these
17.
If ‘W’ is weight of a retaining wall and ‘P’ is the horizontal earth pressure, the factor of safety against sliding, is
a)
1
b)
1.25
c)
1.5
d)
2
18.
Cantilever retaining walls can safely be used for a height not more than____m.
a)
3
b)
4
c)
5
d)
6
19.
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
20.
The thickness of base slab of a retaining wall generally provided, is
a)
One half of the width of the stem at the bottom
b)
One-third of the width of the stem at the bottom
c)
One fourth of the width of the steam at the bottom
d)
Width of the stem at the bottom
21.
Which IS code is used for design of water tanks?
a)
IS 3370
b)
IS 456
c)
IS800
d)
IS 1893
22.
Types of joint in water tank?
a)
Movement joint
b)
Construction joint
c)
Temporary open joint
d)
All of the above
23.
According to approximate method upto what height is assumed to be under cantilever action in circular water tank?
a)
1/3rd or 1 m whichever is higher
b)
1 m
c)
1/4th or 1 m whichever is higher
d)
1.5 m
24.
According to approximate method upto what height is assumed to be under cantilever action in rectangular water tank?
a)
1/3rd or 1 m whichever is higher
b)
1 m
c)
1/4th or 1 m whichever is higher
d)
1.5 m
25.
According to Is 3370 minimum reinforcement for wall, floors and roofs for water tank having dimensions < 15 m is..
a)
Pt min. % should not be less than 0.24% for HYSD and 0.40% for mild steel
b)
Pt min. % should not be less than 0.1% for HYSD and 0.2% for mild steel
c)
Pt min. % should not be less than 0.35% for HYSD and 0.64% for mild steel
d)
Pt min. % should not be less than 0.5% for HYSD and 0.80% for mild steel
26.
When a body is subjected to transverse vibrations, the stress induced in a body will <br />be<br />
a)
shear stress
b)
bending stress
c)
tensile stress
d)
compressive stress
27.
Which types of forces are generated during earthquake?
a)
Vertical shear
b)
Horizontal shear
c)
bending moment
d)
combination of horizontal and vertical shear
28.
While considering the design of R.C. buildings for providing ductility, IS codes prohibit the steel grade greater than _________
a)
Fe 250
b)
Fe 320
c)
Fe 415
d)
Fe 550
29.
Earthquake force is a function of __________
a)
Mass
b)
Thickness
c)
Length
d)
Breadth
30.
Which IS Code is used for designing a structure considering earthquake loads?
a)
IS 800
b)
IS 875
c)
IS 1893
d)
IS 456
100 %
