According to IS: 800-1962, the coefficient of expansion of steel per degree centigrade per unit length, is taken as
0.000008
0.000010
0.000012
0.000014
Correct Answer :
C. 0.000012
Related Questions
As per ISI, rolled steel beam sections are classified into
Two series
Three series
Four series
Five series
The live load for a sloping roof with slope 15°, where access is not provided to roof, is taken as
0.65 kN/m²
0.75 kN/m²
1.35 kN/m²
1.50 kN/m²
The main advantage of a steel member, is:
Its high strength
Its gas and water tightness
Its long service life
All the above
Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is
5 mm
6 mm
8 mm
10 mm
For the economical design of a combined footing to support two equal column loads, the projections of beams in lower tier are kept such that bending moment under column is equal to
Bending moment at the centre of the beam
Half the bending moment at the centre of the beam
Twice the bending moment at the centre of the beam
None of these
If d is the distance between the flange angles,
Vertical stiffeners are provided in steel plate girders if the web is less than d/85
Vertical stiffeners are provided in high tensile steel plate girders if the web is less than d/175
Horizontal stiffeners are provided in steel plate girders if the web is less than d/200
All the above
Strengths of a rivet in single shearing, in bearing and in tearing are 3425 kg, 4575 kg and 5025 kg respectively. If the load in the member is 35 tonnes, the number of rivets required, is
10
11
12
13
In a built up beam actual bending compressive stress fbc is given by (when y1 is the distance of the edge of the beam from the neutral axis).
fbc = (M/Ixx) × y₁
fbc = (Ixx/M) × y₁
fbc = (Ixx/M) + y₁
fbc = (M/Ixx) + y₁
Which of the following conditions is to be satisfied both in elastic and plastic analysis?
Equilibrium condition
Yield condition
Plastic moment condition
Mechanism condition
A structural member subjected to tensile force in a direction parallel to its longitudinal axis, is generally known as
A tie
A tie member
A tension member
All the above
In moment resistant connections, the moment resistance of riveted connection depends upon
Shear in rivets
Compression in rivets
Tension in rivets
Strength of rivets in bearing
The number of seismic zones in which the country has been divided is
3
5
6
7
Lug angles
Are used to reduce the length of connection
Are unequal angles
Increases shear lag
All the above
The maximum slenderness ratio of a compression member carrying both dead and superimposed load is
180
200
250
350
The elastic strain for steel is about
1/12 of strain at the initiation of strain hardening and about 1/120 of maximum strain
1/2 of strain at the initiation of strain hardening and about 1/12 of maximum strain
1/12 of strain at the initiation of strain hardening and 1/200 of maximum strain
1/24 of strain at the initiation of strain hardening and about 1/200 of maximum strain
Net sectional area of a tension member, is equal to its gross section area
Plus the area of the rivet holes
Divided by the area of rivet holes
Multiplied by the area of the rivet holes
None of these
Generally the purlins are placed at the panel points so as to avoid
Axial force in rafter
Shear force in rafter
Deflection of rafter
Bending moment in rafter
The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be:
4.5 mm
6 mm
8 mm
10 mm
The diameter of base of conical flare of a steel stack is
Less than d
Equal to d
More than d
Any of the above Where d is the diameter of the cylindrical part
The connection of one beam to another beam by means of an angle at the bottom and an angle at the top, is known as
Unstiffened seated connection
Stiffened seated connection
Seated connection
None of these
The Indian standard code which deals with steel structures, is
IS : 875
IS : 800
IS : 456
IS : 1893
The stress in the wall of a thin cylinder subjected to internal pressure, is
Hoop compression
Shear
Torsional shear
Hoop tension
The slenderness ratio of lacing bars should not exceed
100
120
145
180
Rolled steel angle sections are classified as
Equal angles
Unequal angles
Bulb angles
All the above
Hudson's formula gives the dead weight of a truss bridge as a function of
Bottom chord area
Top chord area
Effective span of bridge
Heaviest axle load of engine
When plates are exposed to weather, tacking rivets are provided at a pitch in line not exceeding (where t is the thickness of the outside plate).
8 t
16 t
24 t
32 t
The spans are considered approximately equal if the longest span does not exceed the shortest span by more than
5 %
10 %
15 %
20 %
A fillet weld whose axis is parallel to the direction of the applied load, is known as
Diagonal filler weld
End fillet weld
Side fillet weld
All the above
The area Ap of cover plates in one flange of a built up beam, is given by
Ap = Zreqr + Zbeam/h
Ap = Zreqr + Zbeam/A
Ap = Zreqr × Zbeam/h
Ap = Zreqr - Zbeam/h
The connection of intermediate vertical stiffeners to the web, not subjected to external loads, shall be designed for a minimum shear force (kN/m) of
75 t²/h
125 t3/h²
125 t²/h
175 t²/h Where, t = the web thickness in mm and h = the outstand of stiffener in mm