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CEX YESA > Reinforced Concrete Design > Flashcards

Reinforced Concrete Design Flashcards

1
Q

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

A

wL2/8

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2
Q

Loads that are movable or replaceable on structure are known as

A

Live Load

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3
Q

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

A

Soft storey

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4
Q

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

A

Diaphragm

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5
Q

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

A

Debris

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6
Q

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

A

Tendons

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7
Q

What method of prestressing in which tendons are tensioned before concrete is cast in place?

A

Pre-tensioning

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8
Q

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

A

Admixture

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9
Q

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

A

6db

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10
Q

Bars larger than __mm shall not be in bundles in beams

A

36mm

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11
Q

Minimum concrete cover cast against and permanently exposed to earth

A

75mm

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12
Q

in ultimate strength design , the strength reduction factor diameter for shear and torsion

A

0.85

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13
Q

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

A

L/28

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14
Q

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

A

0.60

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15
Q

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

A

10days

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16
Q

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

A

150mm

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17
Q

Aviation control tower fall to what type of occupancy

A

Essential Facilities

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18
Q

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

A

L/360

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19
Q

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

A

L/240

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20
Q

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

A

50

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21
Q

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

A

pier

22
Q

Method of prestressing in which tendons are tensioned after concrete has hardened

A

post tensioning

23
Q

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

A

admixture

24
Q

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

A

wL/2

25
Q

Structures that are subjected to transverse loads are called

A

beams

26
Q

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

A

columns

27
Q

These are referred to permanent loads or unmovable loads

A

Dead loads

28
Q

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

A

Moving loads

29
Q

It is synonym to bending stress

A

Flexural stress

30
Q

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

A

Bond

31
Q

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

A

Shear wall

32
Q

If the ratio of the short direction to the long direction of a slab is less than 0.5, then the slab is considered:

A

one way slab

33
Q

In ultimate strength design, the reduction factor diameter for bending stress is

A

0.9

34
Q

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

A

0.003

35
Q

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

A

20mm

36
Q

A numver 8 ( #8 steel reinforcing bar has a diameter of

A

25mm

37
Q

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

A

essential facilities

38
Q

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 storys above

A

soft story

39
Q

A structural system without a complete vertical load carrying space frame

A

bearing wall system

40
Q

The minimum reinforcing steel for spiral columns allowed by the ACI Code is

A

6-16mm dia bars

41
Q

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

A

32mm

42
Q

The steel ratio, p for spiral columns ranges from

A

0.01 - 0.08

1% - 8%

43
Q

Which is the correct factored load for Strength Design Method

A

1.4 DL + 1.7 LL

44
Q

It is defined as the unit strength of a material

A

Stress

45
Q

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

A

Shearing stress

46
Q

It is the contact pressure developed between two bodies

A

Bearing stress

47
Q

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

A

Thermal stress

48
Q

The actual stress in a material under a given loading

A

Working stress

49
Q

Allowable maximum safe stress that a material can withstand

A

allowable stress

50
Q

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

A

one way slabs

CEX YESA (9 decks)

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