When the depth of a plate girder is at least n times the depth of vertical leg of the flange angles, the girder is known as deep plate girder, if n is
2
4
6
8
Correct Answer :
D. 8
Related Questions
The beams supporting the steps of a stair are generally known as
Headers
Trimmers
Stringers
Spandrel beams
According to IS: 800, in the Merchant Rankine formula the value of imperfection index (n) is
1.0
1.4
1.8
2.0
The central deflection of a simply supported steel beam of length L with a concentrated load W at the centre, is
WL3/3EI
WL4/3EI
WL3/48EI
5WL4/384EI
If P is the wind pressure in kg/cm2, v is the velocity in km/hour and K is a constant of proportionality, then
P = K/v2
v = K/P2
P = Kv2
P = Kv
If N is the number of rivets in the joint, the strength of a riveted joint against shearing of rivets, is given by
Ps = N × (π/4) d2 × Ps
Ps = N × (d × t × ps)
Ps = N × (p - d) × t × Ps
Ps = N × (P + d) × t × ps
Minimum pitch of the rivets shall not be less than
1.5 d
2.0 d
2.5 d
3.0 d Where d is gross diameter of rivet
The range of economical spacing of trusses varies from
L/3 to L/5
L/4 to 2L/5
L/3 to L/2
2L/5 to 3L/5, where L is span
The stress in the wall of a thin cylinder subjected to internal pressure, is
Hoop compression
Shear
Torsional shear
Hoop tension
The allowable stress in axial tension for rolled I-sections and channels, is taken as
1420 kg/cm2
1500 kg/cm2
2125 kg/cm2
1810 kg/cm2
A beam is defined as a structural member subjected to
Axial loading
Transverse loading
Axial and transverse loading
None of these
The bracing between two columns of a steel tank will be designed to resist
Horizontal shear due to wind or earthquake only
Horizontal, shear due to wind or earthquake + 2.5% of column loads
Column loads + 2.5% of horizontal shear due to wind or earthquake
Column loads + full horizontal shear due to wind or earthquake
Rolled steel beams are designated by Indian Standard series and its
Weight per metre and depth of its section
Depth of section and weight per metre
Width of flange and weight per metre
Weight per metre and flange width
The ratio of longitudinal stress to strain within elastic limit, is known as
Modulus of elasticity
Shear modulus of elasticity
Bulk modulus of elasticity
All the above
The ratio of hydrostatic stress to the volumetric strain within the elastic range, is called
Modulus of elasticity
Shear modulus of elasticity
Bulk modulus of elasticity
All the above
As per IS: 800, in the plastic design, which of the following pairs are correctly matched?
Working Loads Load factor
(i) Dead load 1.7
(ii) Dead Load + imposed load 1.7
(iii) Dead load + load due to wind or 1.3 seismic forces
(iv) Dead load + imposed load + load 1.7 due to wind or seismic forces
Of these statements
(i) and (ii) are correct
(i), (ii) and (iii) are correct
(ii) and (iii) are correct
Only (i) is correct
Pitch of tacking rivets, when double angles connected back to back and acting as tension members should not be more than
500 mm
600 mm
1000 mm
300 mm
Assuming the values of maximum deviation ΔP and ΔE to be 25% of the computed value of P and E respectively, the minimum value of the factor of safety is
1.00
0.67
1.67
2.67
When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (Where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)
Is at the maximum distance from CG of the rivet group
Is at the minimum distance from CG of the rivet group
Gives the maximum angle between the two forces Fa and Fm
Gives the minimum angle between the two forces Fa and Fm
The minimum thickness of plates in a steel stack should be
4 mm
5 mm
6 mm
8 mm
Rivets connecting flange angles to cover plates in a plate girder are subjected to
Horizontal shear only
Vertical load only
Both (A) and (B)
None of 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
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
The moment-curvature relation at a plastic hinge is
Linear
Parabolic
Constant moment for all curvatures
Constant curvature for all moments
Perforated cover plates are particularly suitable for built up sections consisting of
Channels placed back to back
Channels placed toe to toe
Four angle box section
All the above
On eccentrically loaded columns, the equivalent axial load may be obtained by
Adding the axial load, eccentric load, the product of the bending moment due to eccentric load and the appropriate bending factor
Adding the axial load and eccentric load and subtracting the product of bending moment and appropriate bending factor
Dividing the sum of axial load and eccentric load by the product of the bending moment and appropriate bending factor
None of these
The effective length of a double angle strut with angles placed back to back and connected to both the sides of a gusset plate, by not less than two rivets, is
0.5 L
0.67 L
0.85 L
2 L
In the cross-section of a weld, throat is the
Minimum dimension
Average dimension
Maximum dimension
None of the above
The slenderness ratio of a column is zero when its length
Is zero
Is equal to its radius of gyration
Is supported on all sides throughout its length
Is between the points of zero moments
As per IS : 875, for the purposes of specifying basic wind velocity, the country has been divided into
4 zones
5 zones
6 zones
7 zones
If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin's formula will be
16 mm
20 mm
24 mm
27 mm