Question 1

Explain what concrete cover is in reinforced concrete components and why it is necessary.

Accepted Answer

Concrete cover refers to the thickness o

Question 2

What is concrete formwork? Which materials are commonly used for the formwork?

Accepted Answer

The mold in which steel reinfo

Question 3

The most important reason for providing ties in a concrete wall is to

Accepted Answer

A) prevent the buckling of longitudinal bars in the wall. 
B) increase the compressive strength of the wall. 
C) allow the formwork to be tied to the longitudinal bars in the wall. 
D) increase the shear strength of the wall. 
E) Ties are generally not provided in a concrete wall. 
A) prevent the buckling of longitudinal bars in the wall. 
B) increase the compressive strength of the wall. 
C) allow the formwork to be tied to the longitudinal bars in the wall. 
D) increase the shear strength of the wall. 
E) Ties are generally not provided in a concrete wall.

Question 4

What is a lap splice in steel bars and why is it required?

Accepted Answer

Because of transportation limitations, r

Question 5

Explain what the following terms mean: plain concrete, reinforced concrete, and prestressed concrete.

Accepted Answer

Concrete without any steel rei

Question 6

If a concrete member is not subjected to tensile stresses created by the loads, such as a slab on a firm base (ground), does it still need steel reinforcement?

Accepted Answer

Yes, because concrete shrinks

Question 7

Concrete reinforcing bars come in limited lengths. Explain how we ensure their continuity in a long structural element, such as a column in a high- rise building or a long, continuous beam.

Accepted Answer

In order to ensure the continuity of con

Question 8

Why should the control joints in a concrete slab- on- ground be provided as soon as possible?

Accepted Answer

The concrete begins to shrink

Question 9

Which material is used for vapor retarder under a concrete slab- on- ground?

Accepted Answer

A plastic

Question 10

What function do ties serve in a reinforced concrete column?

Accepted Answer

The ties serve two functions-constructio

Question 11

Explain how control joints in a concrete slab- on- ground are provided.

Accepted Answer

By sawing the slab as soon as

Question 12

Hooks are used

Accepted Answer

A) where the lap- splice length is excessive. 
B) where lap splicing of bars will produce excessive congestion. 
C) to lap splice reinforcing bars. 
D) all of the above. 
E) none of the above. 
A) where the lap- splice length is excessive. 
B) where lap splicing of bars will produce excessive congestion. 
C) to lap splice reinforcing bars. 
D) all of the above. 
E) none of the above.

Question 13

Mechanical couplers are used

Accepted Answer

A) where the lap- splice length of reinforcing bars is excessive. 
B) to lap splice reinforcing bars. 
C) as an economical alternative to lap splicing of reinforcing bars. 
D) where lap splicing of reinforcing bars will produce excessive congestion. 
E) none of the above. 
A) where the lap- splice length of reinforcing bars is excessive. 
B) to lap splice reinforcing bars. 
C) as an economical alternative to lap splicing of reinforcing bars. 
D) where lap splicing of reinforcing bars will produce excessive congestion. 
E) none of the above.

Question 14

What is the function of stirrups? Sketch commonly used open- loop and closed- loop stirrups.

Accepted Answer

Stirrups are an essential component in r

Question 15

The chairs used to support reinforcing steel bars are generally

Accepted Answer

A) steel chairs with plastic- coated feet. 
B) steel- encased plastic chairs. 
C) plastic chairs. 
D) A and B. 
E) A and C. 
A) steel chairs with plastic- coated feet. 
B) steel- encased plastic chairs. 
C) plastic chairs. 
D) A and B. 
E) A and C.

Question 16

If a concrete member is not a precast concrete member, can it prestressed? Explain.

Accepted Answer

Yes, by posttensioning, which

Question 17

Explain what pretensioning of concrete is.

Accepted Answer

Tensioning (i.e., pulling)the

Question 18

Is concrete cover required in concrete foundations although a foundation is not exposed to the outside environment?

Accepted Answer

Yes. A concrete foun

Question 19

When a strand is tensioned (pulled), is it pulled from the dead end or live end?

Accepted Answer

The answer of When a strand is tensioned (pulled), is...

Question 20

What is the function of a vapor retarder under a concrete slab- on- ground?

Accepted Answer

A vapor retarder under a concr

Exam 22: Concrete Construction-I Formwork, Reinforcement, and Slabs-On-Ground

Explain what concrete cover is in reinforced concrete components and why it is necessary.

What is concrete formwork? Which materials are commonly used for the formwork?

The most important reason for providing ties in a concrete wall is to

What is a lap splice in steel bars and why is it required?

Explain what the following terms mean: plain concrete, reinforced concrete, and prestressed concrete.

If a concrete member is not subjected to tensile stresses created by the loads, such as a slab on a firm base (ground), does it still need steel reinforcement?

Concrete reinforcing bars come in limited lengths. Explain how we ensure their continuity in a long structural element, such as a column in a high- rise building or a long, continuous beam.

Why should the control joints in a concrete slab- on- ground be provided as soon as possible?

Which material is used for vapor retarder under a concrete slab- on- ground?

What function do ties serve in a reinforced concrete column?

Explain how control joints in a concrete slab- on- ground are provided.

Hooks are used

Mechanical couplers are used

What is the function of stirrups? Sketch commonly used open- loop and closed- loop stirrups.

The chairs used to support reinforcing steel bars are generally

If a concrete member is not a precast concrete member, can it prestressed? Explain.

Explain what pretensioning of concrete is.

Is concrete cover required in concrete foundations although a foundation is not exposed to the outside environment?

When a strand is tensioned (pulled), is it pulled from the dead end or live end?

What is the function of a vapor retarder under a concrete slab- on- ground?

An Overview of the Building Delivery Process How Buildings Come Into Being

Design and Constructions Regulations

Loads on Buildings

Load Resistance the Structural Properties of Materials

Properties of the Envelope-I Thermal Properties

Properties of the Envelope-II Air and Water Vapor Control

Fire and Smoke-Related Properties

Acoustical Properties of Materials

Principles of Joints and Sealants Expansion and Contraction Control

Principles of Sustainable Construction

Soils and Excavations

Below-Grade Construction Foundation Systems and Basements

Materials for Wood Construction-I Lumber

Materials for Wood Construction-Ii Engineered Wood Products, Fasteners, and Connectors

Wood Light-Frame Construction-I

Wood Light-Frame Construction-II

Structural Insulated Panel Construction

Material Steel and Steel Components

Structural Steel Construction

Cold-Formed Steel Construction

Lime, Portland Cement, and Concrete

Concrete Construction-II Site-Cast and Precast Concrete Framing Systems

Masonry Materials-I Mortar and Brick

Masonry Materials-II Concrete Masonry Units, Natural Stone, and Glass Masonry Units

Masonry and Concrete Bearing Wall Construction

Exterior Wall Cladding-I Principles of Rainwater Infiltration Control

Exterior Wall Cladding-II Masonry, Precast Concrete, and Gfrc

Exterior Wall Cladding-III Stucco, Adhered Veneer, Eifs, Natural Stone, and Insulated Metal Panels

Glass, Glazing, and Light-Transmitting Plastics

Windows and Doors

Exterior Wall Cladding-Iv Wall System in Glass

Roofing-I Low-Slope Roofs

Roofing-I Steep Roofs

Stairs

Floor Coverings

Ceilings

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