Steel Design Flashcards
The second moment of area of a rectangular section having a width of “b” and depth of “d” is:
a. bd^2/8
b. bd^2/6
c. bd^3/12
d. bd^2/12
c. bd^3/12
The recommended design value of k-factor for both ends pin connected.
a. 0.5
b. 1.0
c. 0.7
d. 2.0
b. 1.0
The theoretical value of k-factor for both ends restrained.
a. 0.5
b. 1.0
c. 0.7
d. 2.0
a. 0.5
The critical slenderness ratio is the upper limit of elastic buckling failure, where its average column stress is equal to ____.
a. 0.5Fy
b. 1.0Fy
c. 0.75Fy
d. 2.0Fy
a. 0.5Fy
The allowable stress for compression members whose largest effective slenderness ratio of any unbraced segment is less than the square root of [(2π^2)E/Fy] as per AISC standards is ____.
a. {1 - [(kL/r^2)/2Cc^2]} * Fy/Fs
b. 12π^2E^2 / [23*(kL/r)^2]
c. π^2E / [1.6 - (L/200r)]
d. 5/3 + [3(kL/r) / 8Cc] - [(kL/r)^3 / 8Cc^3]
a. {1 - [(kL/r^2)/2Cc^2]} * Fy/Fs
The allowable stress for compression members whose largest effective slenderness ratio of any unbraced segment is greater than the square root of [(2π^2)E/Fy] as per AISC standards is ____.
a. {1 - [(kL/r^2)/2Cc^2]} * Fy/Fs
b. 12π^2E^2 / [23*(kL/r)^2]
c. π^2E / [1.6 - (L/200r)]
d. 5/3 + [3(kL/r) / 8Cc] - [(kL/r)^3 / 8Cc^3]
b. 12π^2E^2 / [23*(kL/r)^2]
The allowable stresses for tension in structural steel in terms of gross is taken ___% of specified allowable yield stress.
a. 50
b. 60
c. 75
d. 85
b. 60
A Wide-Flange section W21x62 has a nominal depth of ___ mm.
a. 472
b. 533
c. 635
d. 826
b. 533
The allowable bearing stress on projected area between bolts and steel plate is taken ____ of Fu.
a. 0.3
b. 0.85
c. 1.0
d. 1.2
d. 1.2
In structural steel design, structures carrying liveload which induce impact, the assumed liveload shall be increased sufficiently to provide for it. If not otherwise specified, the increase for supports of elevators shall be:
a. 50%
b. 100%
c. 150%
d. 200%
b. 100%
Based on ASTC, what is the maximum slenderness ratio kL/r for tension members?
a. 100
b. 200
c. 250
d. 300
d. 300
Based on ASTC, The slenderness ratio of compression members shall not exceed:
a. 100
b. 200
c. 250
d. 300
b. 200
The point on the cross section of a member where a transverse load must pass to minimise twisting.
a. centroid
b. shear center
c. torsional center
d. centre of mass
b. shear center
The maximum size of fillet weld that may be used along edges of materials less than 6mm thick:
a. Not greater than thickness of material
b. Not greater than thickness of material less than 1.6mm
c. 8mm
d. 6mm
a. Not greater than thickness of material
It is the sidewise bending or displacement accompanies by twisting about minor or weaker axis usually at the compression section.
a. crippling
b. buckling
c. torsion
d. sagging
b. buckling
Riveted and bolted splice and gusset plates and other connection fittings subject to tensile force shall be design in accordance to 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 ___.
a. 85% of gross area
b. 90% of gross area
c. 70% of gross area
d. 75% of gross area
a. 85% of gross area
Roof liveloads shall be assumed to act:
a. vertically upon the area projected on the horizontal
b. vertically upon the surface area of the roof
c. normal to the surface area of the roof
d. All of the above
a. vertically upon the area projected on the horizontal
The Euler Column formula for finding the critical load on a long column is P_cr = π^2EI/L^2 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:
a. P_cr = π^2EI/100
b. P_cr = π^2EI/195
c. P_cr = π^2EI/400
d. P_cr = π^2EI/1600
b. P_cr = π^2EI/195
The shear strength of a steel I-beam is dependent on the
a. thickness of flanges
b. width of flange
c. thickness of web
d. area of web
d. area of web
The allowable stresses for tension in structured steel in terms of gross area is:
a. 0.60Fu
b. 0.40Fy
c. 0.60Fy
d. 0.50Fu
c. 0.60Fy
The allowable stresses for tension in structural steel in terms of effective net area is:
a. 0.60Fu
b. 0.40Fy
c. 0.60Fy
d. 0.50Fu
d. 0.50Fu
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.
a. centroid distance
b. moment of inertia
c. radius of gyration
d. eccentricity
c. radius of gyration
A Wide-Flange section W21x83 weighs ___ kg/m.
a. 123
b. 196
c. 300
d. 92
a. 123
A Wide-Flange section W21x83 has an overall depth of approximately ___ mm.
a. 450
b. 530
c. 600
d. 720
b. 530
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 of applied stress.
a. 2.0
b. 1.2
c. 0.85
d. 1.6
d. 1.6
It is the ability of a material like steel to undergo large inelastic deformation without failure.
a. elasticity
b. ductility
c. strength
b. ductility
For a relatively short fittings such as splice or gusset plates used as statically loaded connecting elements, the net area A_n shall not exceed ___% of the gross area A_g.
a. 85
b. 65
c. 50
d. 75
a. 85
Modulus of Elasticity of structural steel in MPa.
a. 100000
b. 200000
c. 300000
d. 400000
b. 200000
It is also known as the second moment of area.
a. centroid distance
b. moment of inertia
c. radius of gyration
d. eccentricity
b. moment of inertia
Steel is an alloy comprising of two elements. They are \_\_ and \_\_\_. a. carbon and copper b . copper and tin c. iron and copper d. carbon and iron
b . copper and tin
This type of fasterner is installed by heating to a light cherry-red colour, inserting it into a hole and then applying pressure to the performed head while at the same time squeezing the plain end to form a rounded head.
a. bolt
b. rivet
c. weld
d. NOTA
b. rivet
The allowable bending stress of a non-compact channel section bent about their weaker axis is taken __ Fy.
a. 0.6
b. 0.66
c. 0.75
d. 0.45
a. 0.6
It is the roof beam spanning between trusses of rigid frames subjected to flexure or bending.
a. lintel
b. purlin
c. girt
d. truss
b. purlin
What is the maximum bending moment for a purlin may be taken as:
a. wL^2/12
b. wL^2/10
c. wL^2/8
d. wL^2/20
c. wL^2/8
