Question 1

Explain what curing of concrete is and why it is necessary.

Accepted Answer

Curing of concrete is the process of maintaining adequate moisture and temperature conditions to allow the concrete to achieve its desired strength and durability. This process is necessary because it helps to prevent the loss of moisture from the concrete, which can lead to cracking and reduced strength. Curing also allows the concrete to continue the hydration process, which is essential for the development of its strength and durability. Proper curing can significantly improve the long-term performance and durability of concrete structures. It is typically achieved through methods such as water curing, membrane curing, or the use of curing compounds.

Question 2

Which of the following materials is a pozzolana?

Accepted Answer

A) Concrete 
B) Portland cement 
C) Lime 
D) Fly ash 
E) Sand 
A) Concrete 
B) Portland cement 
C) Lime 
D) Fly ash 
E) Sand D

Question 3

The slump of concrete is a measure of the

Accepted Answer

A) modulus of elasticity of concrete. 
B) tensile strength of concrete. 
C) compressive strength of concrete. 
D) workability of concrete. 
A) modulus of elasticity of concrete. 
B) tensile strength of concrete. 
C) compressive strength of concrete. 
D) workability of concrete. D

Question 4

What is lightweight structural concrete? How does it differ from normal- weight concrete? What are the advantages and disadvantages of using lightweight structural concrete?

Accepted Answer

Lightweight structural concrete is a typ

Question 5

Portland cement sets and gains strength by virtue of its chemical reaction with

Accepted Answer

A) water. 
B) carbon dioxide in air. 
C) oxygen in air. 
D) aggregates. 
E) none of the above. 
A) water. 
B) carbon dioxide in air. 
C) oxygen in air. 
D) aggregates. 
E) none of the above.

Question 6

List the uses of lime in contemporary construction.

Accepted Answer

In masonry mortar, s

Question 7

White Portland cement is generally weaker than normal (gray- colored)Portland cement.

Accepted Answer

A) True 
 B)False

Question 8

The heating of a substance at high temperature is called calcining. Which substances does the calcining of limestone produce?

Accepted Answer

Lime (calc

Question 9

The rate at which concrete gains strength increases as the ambient air temperature increases.

Accepted Answer

A) True 
 B)False

Question 10

What is a concrete admixture, and why is it used? Discuss the commonly used concrete admixtures.

Accepted Answer

A concrete admixture is a material added

Question 11

Hydrated lime is available in two types, which are referred to as

Accepted Answer

A) Types X and Y lime. 
B) Types A and B lime. 
C) Types I and II lime. 
D) Types 1 and 2 lime. 
E) Types N and S lime. 
A) Types X and Y lime. 
B) Types A and B lime. 
C) Types I and II lime. 
D) Types 1 and 2 lime. 
E) Types N and S lime.

Question 12

The most commonly specified type of Portland cement is

Accepted Answer

A) Type II/III. 
B) Type III. 
C) Type C. 
D) Type I/II. 
E) Type pC1. 
A) Type II/III. 
B) Type III. 
C) Type C. 
D) Type I/II. 
E) Type pC1.

Question 13

Explain how air- entrainment in concrete increases concrete's durability to freeze- thaw action.

Accepted Answer

Concrete that is exposed to weather abso

Question 14

In which situations is Type IV Portland cement (PC)used and why?

Accepted Answer

When water is added to PC, the reaction

Question 15

ASTM specifications classify Portland cement into five basic types, referred to as

Accepted Answer

A) Types X, Y, Z, p, and Q. 
B) Types pC1, pC2, pC3, pC4, and pC5. 
C) Types I, II, III, IV, and V. 
D) Types A, B, C, D, and E. 
E) none of the above. 
A) Types X, Y, Z, p, and Q. 
B) Types pC1, pC2, pC3, pC4, and pC5. 
C) Types I, II, III, IV, and V. 
D) Types A, B, C, D, and E. 
E) none of the above.

Question 16

What is the color of normal Portland cement (PC)and where is white PC used?

Accepted Answer

The color of normal PC is gray

Question 17

What is Grade 60 rebar?

Accepted Answer

A reinforcing bar whose tensil

Question 18

Steel reinforcing bars, generally used in concrete, have a yield strength of

Accepted Answer

A) 120 ksi. 
B) 60 ksi. 
C) 80 ksi. 
D) 100 ksi. 
A) 120 ksi. 
B) 60 ksi. 
C) 80 ksi. 
D) 100 ksi.

Question 19

A high- strength concrete generally requires a

Accepted Answer

A) sand- reducing agent. 
B) sand- increasing agent. 
C) water- reducing agent. 
D) water- increasing agent. 
A) sand- reducing agent. 
B) sand- increasing agent. 
C) water- reducing agent. 
D) water- increasing agent.

Question 20

The main ingredient used in the manufacture of Portland cement is

Accepted Answer

A) limestone. 
B) granite. 
C) marble. 
D) iron ore. 
E) sand. 
A) limestone. 
B) granite. 
C) marble. 
D) iron ore. 
E) sand.

Exam 21: Lime, Portland Cement, and Concrete

Explain what curing of concrete is and why it is necessary.

Which of the following materials is a pozzolana?

The slump of concrete is a measure of the

What is lightweight structural concrete? How does it differ from normal- weight concrete? What are the advantages and disadvantages of using lightweight structural concrete?

Portland cement sets and gains strength by virtue of its chemical reaction with

List the uses of lime in contemporary construction.

White Portland cement is generally weaker than normal (gray- colored)Portland cement.

The heating of a substance at high temperature is called calcining. Which substances does the calcining of limestone produce?

The rate at which concrete gains strength increases as the ambient air temperature increases.

What is a concrete admixture, and why is it used? Discuss the commonly used concrete admixtures.

Hydrated lime is available in two types, which are referred to as

The most commonly specified type of Portland cement is

Explain how air- entrainment in concrete increases concrete's durability to freeze- thaw action.

In which situations is Type IV Portland cement (PC)used and why?

ASTM specifications classify Portland cement into five basic types, referred to as

What is the color of normal Portland cement (PC)and where is white PC used?

What is Grade 60 rebar?

Steel reinforcing bars, generally used in concrete, have a yield strength of

A high- strength concrete generally requires a

The main ingredient used in the manufacture of Portland cement is

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

Concrete Construction-I Formwork, Reinforcement, and Slabs-On-Ground

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

Filters