STRUCTURAL DES 2 (NSCP)

The modulus of elasticity of concrete in MPa is equal to ___.

• 1000 sqrt of f’c

• 15100 sqrt of f’c

• 0.17 sqrt of f’c

• 4700 sqrt of f’c

Answer explanation

Which standard specification should quality deformed steel welded wire fabric for concrete reinforcement conform to?

• ASTM A 706:1986

• ASTM A 496:1985

• ASTM A 497:1986

• ASTM A 615:1987

This element at any transverse cross section of a straight beam is the algebraic sum of the moments taken about an axis passing through the centroid of the cross section, of all the loads and reactions applied to the portion of the beam on either side of the cross section?

• Resisting moment

• External moment

• Bending moment

• Reaction

Answer explanation

Which if the following criterion is not applicable for the plug and slot welds?

• The diameter of the holes for the plug weld shall be not less than the thickness of the part containing it plus 8 mm nor greater than 2 ¼” thickness of the weld metal.

• The minimum center-to-center spacing of plug welds shall be 4 times the diameter of the hole.

• The minimum spacing of the lines of slot welds in a direction transverse to their length shall be 8 times the width of the slot

• The length of the slot weld shall not exceed 10 times the thickness of the weld.

Answer explanation

What is the coincidence of the natural period of structure with the dominant frequency in the ground motion?

• Structural vibration effects

• Harmonic motion

• Soil-structure resonance

• Frequency equivalence

What type of foundation is normally used for a residential project with a hard soil?

• . Isolated footing

• Floating foundation

• Isolated footing with tie beam

• Mat foundation

Answer explanation

Floating foundation - equal weight of soil to the building

Mat foundation - weak soil

. Standard 90-degree bend shall consist of extension at the free end of the bar equal to ___.

• 8 db

• 10 db

• 12 db

• 16 db

Answer explanation

The standard hooks for the stirrups and ties shall be ___.

• 90-degree bend plus 6 db extension at the free end of bar for 16mm and smaller

• 90-degree bend plus 12 db extension at the free of end bar for 20 mm and 25 mm dia

• . 135-degree bend plus 6 db extension at the free end of bar for 25 mm and smaller

• . All of the above

Answer explanation

The minimum clear spacing between parallel bars in a layer shall not be less than _db.

• 20 mm

• 25 mm

• 40 mm

• 50 mm

Answer explanation

In spirally reinforced or tied reinforcement compression members, clear distance is ___.

• 1.5 db

• 2.0 db

• 5.0 db

• 1.0 db

Answer explanation