問題一覧
1
The allowable stresses for tension in structural steel in terms of gross area is:
0.60 Fy
2
Riverted and bolted splice and gusset plates and other connection fittings subject to tensile force shall be design in accordance with AISC requirements where the effective net area shall be taken as the actual net area except that, for the purpose of design calculations, it shall not be taken as greater than __.
85% of gross area
3
A wide-flange section W21x83 has an overall depth of approximately __ millimeters
530
4
What is the weight of 40mm diameter deformed steel bar 1m long?
9.56 kgs
5
The maximum size of fillet weld that may be used along edges of materials less than 6mm thick:
Not greater than thickness of material
6
The Euler Column Formula for finding the critical load on a long column is Pcr = π2 EI/L2 where L is the effective length of the column. For a column hinged at the top, fixed at the bottom and 20 inches high, the critical load is equal to:
Pcr = π2 EI/196
7
Roof live loads shall be assumed to act:
Vertically upon the area projected on the horizontal
8
A wide flange section is used as a beam to carry a total shear of 900 kN. If the depth of the wide flange section is 600mm determine the required web thickness. Fy = 250 Mpa.
15 mm
9
This type of fastener is installed by heating to a light cherry-red color, inserting it into a hole and then applying pressure to the preformed head while at the same time squeezing the plain end to form a rounded head
Rivet
10
The allowable bending stress of a non-compact channel section bent about their weaker axis is taken __Fy
0.60
11
A wide-flange section W21x32 weighs __ kg/m
123
12
It is the sidewise bending or displacement accompanied by twisting about minor or weaker axis usually at the compression section.
Buckling
13
The point on the cross-section of a member where a transverse load must pass to minimize visiting
Shear center
14
The maximum bending moment for a purlin may be taken as:
wL2/8
15
The allowable bending stress of a compact wide-flange section bent about their weaker axis is taken __ Fy
0.75
16
Based on the AISC, what is the maximum slenderness ratio kL/r for tension members?
300
17
For relatively short fittings such as splice or gusset plates used as statically loaded connecting elements, the net area An shall not exceed __% of the gross area Ag
85
18
It is also known as the second moment of area
Moment of inertia
19
Steel is an alloy comprising of two elements. They are __ and __.
Carbon & iron
20
The slenderness ratio of compression members shall not exceed:
200
21
It is a roof beam spanning between trusses or rigid frames subjected to flexure or bending
Purlin
22
What is the weight of 32mm diameter deformed steel bar 9m long? Weight of steel = 7850 kg/cu.m.
56.87 kgs
23
It is the ability of a material like steel to undergo large inelastic deformation without failure.
Ductility
24
The maximum size of fillet weld that may be used along edges of materials 6mm or more in thickness
Not greater than thickness of material less 1.6mm
25
It is an imaginary distance from the centroidal axis at which the entire area can be assumed to exist without affecting the moment of inertia
Radius of gyration
26
Modulus of Elasticity of structural stell in MPa
200,000
27
The shear strength of a steel I-beam is dependent on the
Area of web
28
In structural steel design, structures carrying live laid which induced impact, the assumed live load shall be increased sufficiently to provide for it. If not otherwise specified, the increase for supports of elevators shall be:
100%
29
The allowable stresses for tension in structural steel terms of effective net area is:
0.50 Fu
30
In computing net area, the width of a rivet or bolt hole shall be taken as __ mm greater than the nominal dimension of the hole normal to the direction applied stress
1.6