STRUCTURAL CE COMPILED PART 1

Ratio of the sliding force required to the weight of the material being pushed. It is the measure of the resistance to the sliding of one material resting on another.

For a force system to be in static equilibrium, the algebraic summation of forces is:

Two forces equal in magnitude but oppositely directed and produce moment is called

A force may be moved anywhere along its line of action without producing a change in external effect. This statement is

What states the moment of the 2 forces about the same axis.

In a structure whose material follows hooke’s law and in which the supports are unyielding and the temperature is constant, what law states that the external virtual work done by a system of forces, P. during the deformation caused by a system of forces, Q, is equal to the virtual work done by a system of forces, Q, during the deformation caused by the P forces.

Snow loads, wind, pressure suction and earthquake loads and the like are what type of loads?

This states that the external effect of a force on a body is the same for all points of application along its line of action, it is independent of the point of application.

Among the following axioms of mechanics, which of the following is incorrect?

An elevator cable will have its greatest tension when the elevator car is moving

Calculate the second moment of area of a rectangular section with base of 50mmm and height of 100mm

These are referred to permanent loads or unmovable loads.

It is a type of truss having both vertical and diagonal members between the upper and lower chords, with the diagonals sloping toward the center

It states that stress is proportional to strain

. The normal force exerted by a smooth horizontal surface towards a 100-lb block acting on it is

It refers to occupancy load which is either partially or fully in place or may not be present at all is called:

The ratio of unit stress to unit strain

What is the type of beam wherein no rotation or vertical movement can occur at either ends?

The property of materials that enable it to absorb energy before rupturing, represented by the area under stress strain curve derived from a tensile test of the material.

The property of a material to resist a change in its physical shape

The property of a material to undergo plastic deformation after being stressed beyond the elastic limit before rupturing

The property of a material to fracture at low stress without appreciable deformation.

A force that acts perpendicular to the cross section of a structural member and at its centroid.

The twisting of a structural member about its longitudinal axis by two equal and opposite torques.

A type of beam with fixed support and a roller support at the other end.

The stress beyond which the ratio of stress and strain for a material no longer remains constant

The change in length caused usually by a force applied to a piece, the change being expressed as a ratio, the increase or decreased divided by the original length

A spherical pressure vessel with an internal diameter of 540 mm is to be generated using a 3mm thick steel. The yield stress of the material is 450 Mpa and the maximum allowable shear stress is 240 Mpa. Determine the maximum allowable internal pressure in Mpa.

The Ratio of the transverse strain to longitudinal strain

The modulus of elasticity of steel is

This represents the ability of the material to absorb energy without any permanent damage to the material.

What class of black or dark colored cementitious substances is composed principally of high molecular weight hydrocarbons?

Give the flexibility of a truss member with length L, cross sectional area A, modulus of elasticity E and moment of inertia I.

What terms refer to roof beams spanning between trusses?

What do you call the horizontal wall beams serving principally to resist bending due to wind on the side of an industrial building.

A metal specimen with 36mm diameter and has a length L=360 mm and a force of 300 Kn, elongates the length by 1.2mm. What is the elastic of modulus?

This element is added to the steel to make the steel corrosion resistant, when this element is more than 16%, the material is called stainless steel.

A heat treatment of steel which is done through shock cooling by immersing it to liquid or molten material into a cooling medium.

It is the largest stress based on the original cross-sectional area which a material can stand. Thus, it is the maximum ordinate of the stress-strain curve.

What is the stress developed in a bar 1m Length with rectangular cross section 50mm x 50mm subjected to an axial tensile force of 100 N

When a beam is loaded the new position of its longitudinal centroid axis is called.

A 2m solid shaft having a radius of 35mm in subjected to a torque of 950N-m. Using G=80000 Mpa, Calculate the maximum torsional shearing stress developed.

A cantilever beam 6m long carries a uniform load of 400kn/m throughout the span I=1.7 x 10^9 mm and e=200000mpa. What is the deflection at the free end?

The point in the moment diagram at which the curvature reverses as it changes from concave to convex is called :

Using the same EI) Which member will resist most of the moment?

What is the carryover factor for prismatic member?

A beam that project beyond one or both its support/s is called.

What is the third requirement to guarantee the correct solution to a structural analysis problem? (The two being equilibrium and stress-strain relationship) HINT: It is something to do with constant deformation.

What states that given a linear transformation relationship between two force vectors P=HQ, the corresponding displacement vector transformation. Such as that. Is simple the transpose of the force transformation matrix H?

In the conjugate beam method, the actual slope equals:

What is the max moment for a restrained beam?

Which of the ff. statements is/are false about the positions of the live load moment envelope?

The equivalent spring constant K for a vibrating system with two springs having spring constant K1 and K2 respectively in parallel is.

A simple beam has a span of 6 m with two concentrated loads of 20kn each placed at the third points of the span. If the extreme fiber stress is 10Mpa, determine the required section modulus

A testing machine that may be used to conduct test site, compressive, bend, and shear test.

Test that determines the stress level of a metal can withstand without failure when subjected to an infinitely number of repeated alternating stresses

Test that determines the resistance of a metal to penetration.

The minimum stress required to create permanent deformation in a metal.

A testing machine that may be used to conduct hardness test on metals.

The process of treatment of concrete against evaporation of moisture and temperature condition

Important property of concrete to be able to withstand deterioration due to weathering action.

The ease in which a uniform mass of freshly mixed concrete can be moved without segregation into final position in which the concrete is allowed to harden.

A test manifests the resistance of cement against deformation caused by temperature change

Comprises tests performed by a company receiving new supplies that the shipment meets the standards called for in the order.

Involves test done by a company on their own product that the product meets the manufacturer’s standard.

Required gage length (GL) of the specimen in the Tension Test of rebars.

Structural units cast in molds in a factory that have reinforcing members not under tension as they are being cast

Tension is applied to steel reinforcing after the concrete has been poured and allowed to harden.

Structural units cast in molds in a factory that have stresses introduced as they are being cast or after casting.

The process used to lower the subsurface water on a site so that the excavation remains dry and stable

Construction equipment primarily used for lifting, lowering and transporting loads. They move loads horizontally by swinging or traveling.

Process of bringing earthwork to the desired shape and elevation.

The lifetime of an equipment over which it can profitably survive in the face of improved models, changes in methods and techniques etc.

Type of foundation that transmits load to the soil throughout the footing

These are relatively long, slender members that transmit foundation loads thru soils strata of low bearing capacity to deeper soil or rock strata having a high bearing capacity.

Cement which does not only harden by reacting with water but also form a water – resistant product.

Raw materials used to produce cement.

The measure of the relative fineness of sand

This test determines the silt and clay composition in aggregates. It also indicates the cleanliness of the aggregates

This test evaluates the structural strength of aggregates

Moisture condition of an aggregate where the surface is dry but the voids and interior of the aggregate are fully saturated.

The most important material in concrete which is held together by cement paste

A standard test done on reinforcing steel bars to check its amenability to bending in structural applications.

A mechanical test used to evaluate the tensile properties of steel