For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as
Zero
±0.2 p
± 0.5 p
±0.7 p Where p is basic wind pressure
Correct Answer :
B. ±0.2 p
Related Questions
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 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
When the bolts are subjected to reversal of stresses, the most suitable type of bolt is
Black bolt
Ordinary unfinished bolt
Turned and fitted bolt
High strength bolt
The use of tie plates in laced columns is
Prohibited
Not prohibited
Permitted at start and end of lacing system only
Permitted between two parts of the lacing
The safe working pressure for a spherical vessel 1.5 m diameter and having 1.5 cm thick wall not to exceed tensile stress 50kg/cm2, is
16 kg/cm2
18 kg/cm2
20 kg/cm2
22 kg/cm2
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 minimum thickness of plates in a steel stack should be
4 mm
5 mm
6 mm
8 mm
If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then impact factor is taken as
0
0.5
Between 0.5 and 1.0
1.0
Column footing is provided
To spread the column load over a larger area
To ensure that intensity of bearing pressure between the column footing and soil does not exceed permissible bearing capacity of the soil
To distribute the column load over soil through the column footing
All the above
The slenderness ratio of a column supported throughout its length by a masonry wall is
Zero
10
100
Infinity
The least permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to
150 t
160 t
170 t
180 t
To keep the intensity of bearing pressure between the column base and concrete, compressive throughout the length of the column base, the ratio of the moment M to axial load P should be
< L/3
< L/6
> L/3
> L/6
Diameter of a rivet hole is made larger than the diameter of the rivet by
1.0 mm for rivet diameter upto 12 mm
1.5 mm for rivet diameter exceeding 25 mm
2.0 mm for rivet diameter over 25 mm
None of these
For a steel member of slenderness ratio 350, the allowable stress is 76 kg/cm2 if it is
HTW grade of thickness exceeding 32 mm
HT grade of thickness exceeding 45 mm
HT grade of thickness not exceeding 45 mm
All the above
For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?
Equal angles back to back
Unequal legged angles with long legs back to back
Unequal legged angles with short legs back to back
Both (B) and (C)
If d is the distance between the flange angles, the vertical stiffeners in plate girders are spaced not greater than
d
1.25 d
1.5 d
1.75 d
Working shear stress on the gross area of a rivet as recommended by Indian Standards, is
785 kg/cm2
1025 kg/cm2
2360 kg/cm2
None of these
Which of the following conditions is to be satisfied both in elastic and plastic analysis?
Equilibrium condition
Yield condition
Plastic moment condition
Mechanism condition
If R is the reaction on the bearing plate, the minimum moment of. inertia of the bearing stiffener provided at the support of a plate girder of overall depth D, the maximum thickness of the compression flange T, carrying total load W, is
(D²/250) × (R/W)
(D3T/250) × (R/W)
(DT/250) × (R/W)
(DT/250) × (W/R)
Horizontal stiffener in a plate girder is provided to safeguard against
Shear buckling of web plate
Compression buckling of web plate
Yielding
All of the above
The number of seismic zones in which the country has been divided is
3
5
6
7
The bending moment for filler joists at the middle of an intermediate span, is
WL²/10
- WL²/10
- WL²/12
WL²/12
The heaviest I-section for same depth is
ISMB
ISLB
ISHB
ISWB
The greatest permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to
180 t
220 t
230 t
270 t
The beam outside a wall upto floor level above it, is known as
Rafter
Purlin
Spandrel beam
Lintel
The moment-curvature relation at a plastic hinge is
Linear
Parabolic
Constant moment for all curvatures
Constant curvature for all moments
The distance measured along one rivet line from the centre of a rivet to the centre of adjoining rivet on an adjacent parallel rivet line, is called
Pitch of rivet
Gauge distance of rivet
Staggered pitch
All the above
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
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
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