CE COMPILED PART 2

What is the mode of failure for short columns at which the concrete reaches its limit strain EU at precisely the same instant that the tensile steel on the far side of the column reaches yield strain EY?

Given Es= 29,000 Ksi, Econcrete = 6,000 ksi. What is the modular ratio?

What is the max Vs (Shear carried by the stirrups)?

What is the distance from the extreme fiber in compression to the centroid of the tension steel area?

The maximum useable strain at the extreme concrete compression fiber shall be assumed to be equal to

A buried plate, wall or block attached at some distance from and forming an anchorage for retaining wall

It is a beam especially provided over an opening for a door, window, etc. to carry the wall over the opening

What will happen to the concrete strength if the water-to-cement-ratio decreases?

What is the property of concrete by which it continues to deform with time under sustained loads at unit stresses within acceptable elastic range?

Honeycomb structures exhibit: I. Small arches with chain particles II. Has a void ratio of 0.91 for a simple cubic packing III. Has a void ratio of 0.35 for pyramidal packing IV. Negative relative densitie

What is the condition where the tension steel strain reaches the yielding strain simultaneously with the concrete reaching the crushing strain, which is usually 0.003?

What is a material that has adhesive and cohesive properties enabling it to bound mineral fragments into a solid mass in the presence of water?

What material have adhesive and cohesive properties necessary to bond inert aggregates into a solid mass of adequate strength and durability?

What is generated when compound in cement react with water to acquire stable low-energy states?

What compounds reduce in the interparticle forces that exist between cement grains in the fresh paste; thereby increasing the paste fluidity

In mixes exposed to water, what is the term used to refer to the separation of aggregate from the bitumen due to the faster adsorption of water on the aggregate surface?

A parameter used for estimating strength of concrete

It is the property of fresh concrete which is the ability to flow under momentum transfer or under mechanical stress?

True or False: As water cement ratio increases, there is progressive weakening due to increase in porosity

It is a temporary dam-like structure constructed around an excavation to exclude wate

Which of the following is NOT a property of hardened hydraulic cement concrete?

Which of the following properties of aggregates has the LEAST influence to the quality of concrete?

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:

Based on the AISC, what is the maximum slenderness ratio kL/r for tension members?

The slenderness ratio of compression members shall not exceed:

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.

The point on the cross-section of a member where a transverse load must pass to minimize visiting

The maximum size of fillet weld that may be used along edges of materials less than 6mm thick

The maximum size of fillet weld that may be used along edges of materials 6mm or more in thickness

It is the sidewise bending or displacement accompanied by twisting about minor or weaker axis usually at the compression section.

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 __.

Roof live loads shall be assumed to act:

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:

The shear strength of a steel I-beam is dependent on the

The allowable stresses for tension in structural steel in terms of gross area is:

The allowable stresses for tension in structural steel terms of effective net area is:

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 wide-flange section W21x32 weighs __ kg/m

A wide-flange section W21x83 has an overall depth of approximately __ millimeters

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

It is the ability of a material like steel to undergo large inelastic deformation without failure.

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

Modulus of Elasticity of structural stell in MPa

It is also known as the second moment of area

Steel is an alloy comprising of two elements. They are __ and __.

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

The allowable bending stress of a non-compact channel section bent about their weaker axis is taken __Fy

It is a roof beam spanning between trusses or rigid frames subjected to flexure or bending

The allowable bending stress of a compact wide-flange section bent about their weaker axis is taken __ Fy

The maximum bending moment for a purlin may be taken as:

What is the weight of 32mm diameter deformed steel bar 9m long? Weight of steel = 7850 kg/cu.m

What is the weight of 40mm diameter deformed steel bar 1m long?

Calculate the maximum uniform load so that the allowable shear stress parallel to the grain is not exceeded?

. Calculate the maximum uniform load so that the allowable bending stress is not exceeded?

Calculate the maximum uniform laid so that the allowable deflection is not exceeded?

The T-section shown is formed by joining two rectangular pieces of wood together. The beam is subjected to a maximum shearing force of 60kN.

Calculate the moment of inertia about the neutral axis in mm?

The T-section shown is formed by joining two rectangular pieces of wood together. The beam is subjected to a maximum shearing force of 60kN. Calculate the shearing stress at the neutral axis?

The T-section shown is formed by joining two rectangular pieces of wood together. The beam is subjected to a maximum shearing force of 60kN. Calculate the shearing stress at the junction between two pieces of wood?

Which of the following gives the smallest dimension of beam that will not exceed the allowable bending stress?

Which of the following gives the smallest dimension of the beam that will not excess the allpwable shearing stress?

Which of the following gives the smallest dimension of the beam that will not excess the allowable deflection?

. A timber column height of 5m has a square cross-section of side 200mm. It is supporting a load of 320 KN. At mid-height a recess is cut in one face of the column to receive a girt. The cut is 250mm vertical and 50mm deep. Calculate the strain energy in Newton-meter if E=1360 Mpa

Determine the most economical commercial size of a Yakal beam which can replace a 100m x 200mm Apitong beam. The allowable bending stress for Apitong and Yakal are 13.8Mpa and 19.3 Mpa, respectively. Assume lateral stability is not a problem.

A cantilever wooden beam 60mm wide by 200mm high and 6m long carries a load that varies uniformly from zero at the free end to 1000 N/m at the wall. Compute the flexural stress in a fiber 40mm from the top of the beam at a section 3m from the free end.

A 2”x4”1” lumber is:

What do you call the type of cut that is parallel to the axis of the tree and radially across the annual rings?

What type of defect in lumber is described as the longitudinal cracks following the growth rings? This develops prior to cutting the lumber and sometimes causeb by heavy winds.

True/ False: Wood is stronger when load is ⊥ to the grains

The maximum moment of a simply supported beam whose span length is L, in meter, carrying a uniformly distributed load of w in N/m is.

Loads that are moveable or replaceable on structure are known as.

It is one in which the lateral stiffness is less than 70% of the stiffness of the story above it.

A horizontal or nearly horizontal system acting to transmit lateral forces to the vertical resisting elements. It includes horizontal bracing system.

These are inert material used in concrete which occupy more than 75% of the volume of the hardened concrete product.

. Steel elements such as wire, cables, bars, rods or strands of wires or a bundle of such elements used in pre- stressed concrete structures are called

What method of pre- stressing in which tendons are tensioned before concrete is cast in place.

This refers to the substance other than aggregate, cement or water added in a small quantity normally less than 5% of the weight cement, to alter the properties of the concrete mix or hardened solid.

The minimum bend diameter for 10mm through 25mm bars.

Bars larger than _____ mm shall not be bundles in beams.

Minimum concrete cover cast against and permanently exposed to earth.

In ultimate strength design, the strength reduction factor for shear and torsion.

The minimum one way slab thickness for a BOTH ends continuous slab is

Deep simple span flexural members has overall depth to clear span ratio greater than.

Before commencing the excavation work, the person making the excavation shall notify in writing the owner of the adjoining building not less than ____ days before such excavation is to be made.

The maximum spacing of ties and spirals in a driven pre- cast concrete pile, center to center

Aviation control towers fall to what type of occupancy?

The allowable deflection for any structural member loaded with live load only.

The allowable deflection for any structural member loaded with dead load and live load only.

Spacing for a lateral support for a beam shall not exceed ____ times the least width b of compression flange or face.

It is an isolated column of masonry or a bearing wall not bonded at the sides into associated masonry, when its horizontal dimension measured the right angles or the thickness does not exceed four times its thickness.

Method of pre- stressing in which tendons are tensioned after concrete has hardened

A material other than aggregate, cementitious material or water, added in small quantities to the mix in order to produce some (desired) modifications, either to the properties of the mix or of the hardened product.

A simply supported beam , L meters long, carrying a uniformly distributed load of w in N/m, produces a maximum shear force of.

Structures that are subjected to transverse load are called

Members that are generally vertical, subjected to compressive loads sometimes with bending moments are called

These are referred to permanent loads or unmovable loads.

Loads that change position within the span of a beam in short amount of time. These loads are often exemplified by wheel loads

It is synonym to bending stress.

Adherence to materials such as bricks/mortar , or piles of felt, of between felts and other elements of roof systems which use bitumen or other materials as the cementing agent.

A wall that resists horizontal forces applied in the plane of the wall.

. If the ratio of the short direction to the long direction of a slab is less than 0.5 then the slab is.

In ultimate strength design, the reduction factor for bending is

The actual strain by which a concrete fails is 0.004. For safety purposes , the ACI code allows designers to use.

The minimum clear cover allowed by the code for slabs, not exposed to weather is

A Number 8(#8 steel reinforcing bar) has a diameter of

What do you call those structures that are necessary for emergency operations subsequent to a natural disaster

It is one in which the lateral stiffness is less than 70% of the stiffness of the story above or less than 80% of the average stiffness of the three stories above

A Structural system without a complete vertical load- carrying space frame

The minimum reinforcing steel for Spiral Columns allowed by the ACI Code is.

The ACI Code states that “bars larger than #11 should not be bundles in beams or girders”.This means that one should not bundle the steel bars if the diameter is larger than

The steel ratio, p for spiral columns ranges from.

The temperature bars are 0- 10mm diameter steel bars placed on top and perpendicular to the main reinforcement of.

Which is the correct factored load for Strength Design Method.

is defined as the unit strength of a material.

The stress developed when the applied load causes adjacent sections within a body to slide past each other

. It is the contact pressure developed between two bodies.

The stress induced as a result od restrained deformations due to changes in temperature

It is the maximum safe stress that a material can withstand.