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WorksheetsDay-3 ESD 24-04-2020
Total questions: 40
Worksheet time: 37mins
What is compression member?
structural member subjected to tensile force
structural member subjected to compressive force
structural member subjected to bending moment
structural member subjected to torsion
The strength of column does not depend on
width of building
material of column
cross sectional configuration
length of column
The length of member should be _________ for a short column. (Hint: The slenderness ratio of column defines the column as short or long column)
where, r is radius of gyration
L ≤ 88.5r
L ≥ 88.5r
L ≥ 125r
L > 150r
Long compression members will ______
a)
not buckle
buckle inelastically
buckle plastically
buckle elastically
What is squash load?
load at which member will not deform axially
load at which member deforms laterally
load at which member deforms axially
load at which member will not deform axially
The design compressive strength of member is given by________. where, Ae is effective sectional area, fcd is design compressive stress.
Aefcd
Ae/fcd
fcd
0.5Aefcd
What is the value of imperfection factor for buckling class a?
0.34
0.75
0.21
0.5
If imperfection factor α = 0.49, then what is the buckling class?
a
c
b
g
The compressive strength for ISMB 400 used as a column for length 5m with both ends hinged is
275 kN
375.4 kN
453 kN
382 kN
Slenderness ratio of lacing is limited to
200
145
500
380
Thickness of lacing member should be
less than 1/40th of the effective length for single lacing
not less than 1/60th of the effective length for double lacing
less than 1/60thof the effective length for double lacing
less than 1/60th of the effective length for single lacing
Effective slenderness ratio of laced column shall be ________
equal to the maximum slenderness ratio of column
1.05 times the maximum slenderness ratio of column
0.5 times the maximum slenderness ratio of column
2 times the maximum slenderness ratio of column
Minimum radius of gyration for lacing flats is
t/√12
t/12
t/√24
t/24
Thickness of batten plates shall be
not less than 1/50th of distance between innermost connecting transverse bolts/rivets
less than 1/50th of distance between innermost connecting transverse bolts/rivets
less than 1/60th of distance between innermost connecting transverse bolts/rivets
less than 1/80th of distance between innermost connecting transverse bolts/rivets
Effective slenderness ratio of battened column shall be ____ of actual slenderness ratio of column
0.5 times
1.1 times
2 times
2.5 times
Maximum spacing of batten should be such that slenderness ratio of component member should be
not greater than 50
greater than 50
greater than 0.7 times slenderness ratio of member as a whole
greater than slenderness ratio of member as a whole
Depth of intermediate batten = _______ depth of end batten
1/2
3/4
1
2
A laced column is_____ than battened column for same load
equally strong
weaker
stronger
cannot be compared
Thickness of batten should not be less than
1/40th of distance between innermost connecting lines of bolts
1/50th of distance between innermost connecting lines of bolts
1/100th of distance between innermost connecting lines of bolts
1/10th of distance between innermost connecting lines of bolts
The design shear strength is given by____. where Vn= plastic shear resistance, γm0 = partial factor of safety.
Vn
Vn/γm0
Vn x γm0
γm0
In a slab 12 mm diameter bars are to be provided at 200 mm center to center as main reinforcement, due to non availability the diameter of bars to be changed to 16 mm the new spacing would be
355.55 mm
112.8 mm
300 mm
450 mm
In a two way slab of lifting of corners occur due to
resultant shear force at the ends
torsional moment on the slab
unbalanced moment on the slab
resultant stress at the ends
A simply supported slab of 10 m effective span, the minimum effective depth to satisfy the vertical deflection limits should be
50 mm
75 mm
60 mm
90 mm
In a two way restrained slab torsion steel is provided at
top
bottom face along the width
both a and b
none
The minimum percentage of high yield strength deformed bars in RCC slabs is:
0.4
0.15
0.12
0.23
Limit State Method is based on _____________
calculations on service load conditions alone
calculations on ultimate load conditions alone
calculations at working loads and ultimate loads
calculations on earthquake loads
What is limit state?
Acceptable limits for safety and serviceability requirements before failure occurs
Acceptable limits for safety and serviceability requirements after failure occurs
Acceptable limits for safety after failure occurs
Acceptable limits for serviceability after failure occurs
Which of the following relation is correct?
Design Load = Characteristic Load
Design Load = Characteristic Load + Partial factor of safety
Design Load = Characteristic Load / Partial factor of safety
Design Load = Characteristic Load x Partial factor of safety
Which of the following relation is correct?
Design Strength = Ultimate strength + Partial factor of safety
Design Strength = Ultimate strength /Partial factor of safety
Design Strength = Ultimate strength – Partial factor of safety
Design Strength = Ultimate strength x Partial factor of safety
The partial factor of safety for resistance governed by yielding is :
1.10
1.25
1.50
1.15
The partial factor of safety for resistance governed by ultimate strength is :
1.10
1.50
1.25
1.15
What is characteristic load?
seismic load
load which will be exceeded by certain probability during life of structure
load which will not be exceeded by certain probability during life of structure
pressure load
Which IS code is used for calculating different loads on different structures?
IS 800
IS 456
IS 875
IS 13920
Steel is mainly an alloy of
Iron and Carbon
Sulphur and Zinc
Zinc and tin
Phosphorous and carbon
Which of the following is a disadvantage of Steel?
High strength per unit mass
High durability
Fire and corrosion resistance
Reusable
Elastic Modulus of Steel is __________
1.5 x 109 N/mm2
2.0 x 105 N/mm2
2.0 x 105N/m2
1.5 x 109 N/m2
Unit mass of Steel = ________
785 kg/m3
450 kg/m3
450 kg/cm3
7850 kg/m3
Structural Steel normally has carbon content less than _______
1.0 %
0.6 %
3.0 %
0.5 %
High carbon steel is used in ______________
transmission lines and microwave towers
structural buildings
fire resistant buildings
for waterproofing
Fire resistant steels are also called as ____________
Stainless steel
Weathering steel
High strength steel
Thermo Mechanically treated steel
