Question 1

Concrete shell roofs are not commonly used because

Accepted Answer

A)  they require a relatively large amount of concrete per square foot of floor area.
B)  they require prestressing, which substantially raises their cost.
C)  they require a relatively large amount of steel reinforcement per square foot.
D)  all of the above.
E)  none of the above.F) C) and D)
G) A) and C)

Question 2

Steel reinforcement in concrete elements that are permanently exposed to the earth, such as in footings, must have a minimum concrete cover of

Accepted Answer

A)  3 in.
B)  5 in.
C)  4 in.
D)  1 in.
E)  2 in.F) B) and E)
G) A) and C)

Question 3

The term flying form refers to

Accepted Answer

A)  a large formwork assembly for roof slabs.
B)  a large formwork assembly for floor and roof slabs.
C)  a large formwork assembly for columns.
D)  a large formwork assembly for concrete walls.
E)  a large formwork assembly for floor slabs.F) A) and E)
G) A) and D)

Question 4

Explain what a control joint in a concrete slab- on- ground is and its purpose.

Accepted Answer

A control joint responds to the shrinkag...

Question 5

Which material is used for a drainage layer under a concrete slab- on- ground and why?

Accepted Answer

In order to function as capillary break,...

Question 6

Explain what an isolation joint in concrete construction is.

Accepted Answer

An isolation joint separates t...

Question 7

Explain what concrete cover is and the functions it serves.

Accepted Answer

Concrete cover refers to the layer of co...

Question 8

What is a shore and which material is it made of?

Accepted Answer

A vertical post to s...

Question 9

A vapor retarder is required under

Accepted Answer

A)  all interior concrete slabs- on- ground.
B)  all exterior concrete slabs- on- ground.
C)  all concrete slabs- on- ground.
D)  some interior concrete slabs- on- ground.E) C) and D)
F) B) and C)

Question 10

Form liners are used to

Accepted Answer

A)  allow acid etching of concrete form before placing concrete.
B)  produce textured concrete surfaces.
C)  allow acid etching of the concrete surface after stripping the forms.
D)  ensure easy strippability of forms.
E)  allow water washing of concrete after stripping the forms.F) B) and D)
G) C) and D)

Question 11

How many wires are there in a typical prestressing monostrand?

Accepted Answer

The answer of How many wires are there in a...

Question 12

Stirrups are used in a concrete beam

Accepted Answer

A)  to increase the tensile strength of the beam beyond that provided by concrete.
B)  to provide shear strength in the beam because concrete's shear strength is negligible.
C)  to increase the beam's compressive strength.
D)  to provide tensile strength in the beam since concrete's tensile strength is negligible.
E)  to increase the shear strength of the beam beyond that provided by concrete.F) A) and D)
G) C) and D)

Question 13

Using sketches and notes, explain the typical layout of reinforcement in a simply supported, reinforced- concrete beam.

Accepted Answer

In a simply supported, reinforced-concre...

Question 14

Which of the following statements is true?

Accepted Answer

A)  Posttensioning is generally done at the construction site and yields a precast, posttensioned concrete member.
B)  Pretensioning is generally done at the precaster's plant and yields a precast, prestressed concrete member.
C)  Posttensioning is generally done at the precaster's plant and yields a precast, posttensioned concrete member.
D)  Pretensioning is generally done at the construction site and yields a precast, prestressed concrete member.E) None of the above
F) B) and C)

Question 15

The primary purpose of steel reinforcement is to increase the tensile strength of concrete elements. However, steel reinforcement is also used to increase the shear strength and compressive strength of concrete elements.

Accepted Answer

A) True 
 B)False

Question 16

Describe the differences between pretensioning and posttensioning of concrete. Is there any difference in the type of steel used in each case?

Accepted Answer

Pretensioning and posttensioning are two...

Question 17

Concrete can be prestressed in two ways. Name them.

Accepted Answer

Pretension...

Question 18

Explain what posttensioning of concrete is.

Accepted Answer

Tensioning (i.e., pulling), th...

Question 19

Formwork for a concrete wall generally consists of

Accepted Answer

A)  plywood, form ties, walers, and stiffbacks fastened together with clamps.
B)  plywood, form ties, walers, and stiffbacks fastened together with duplex nails.
C)  plywood, form ties, and walers fastened together with duplex nails.
D)  plywood and stiffbacks fastened together with clamps.E) None of the above
F) A) and D)

Question 20

Why is a shear key required in a construction joint?

Accepted Answer

A shear key simulate...

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

The term flying form refers to

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Concrete can be prestressed in two ways. Name them.

Correct AnswerverifiedPretension...View AnswerShow Answer

Which material is used for a drainage layer under a concrete slab- on- ground and why?

Correct AnswerverifiedIn order to function as capillary break,...View AnswerShow Answer

Form liners are used to

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Explain what an isolation joint in concrete construction is.

Correct AnswerverifiedAn isolation joint separates t...View AnswerShow Answer

What is a shore and which material is it made of?

Correct AnswerverifiedA vertical post to s...View AnswerShow Answer

Explain what concrete cover is and the functions it serves.

Correct AnswerAnswered by ExamLex AIConcrete cover refers to the layer of co...View AnswerShow Answer

The primary purpose of steel reinforcement is to increase the tensile strength of concrete elements. However, steel reinforcement is also used to increase the shear strength and compressive strength of concrete elements.

Correct AnswerverifiedShow Answer

Steel reinforcement in concrete elements that are permanently exposed to the earth, such as in footings, must have a minimum concrete cover of

Correct AnswerverifiedShow Answer

Explain what a control joint in a concrete slab- on- ground is and its purpose.

Correct AnswerverifiedA control joint responds to the shrinkag...View AnswerShow Answer

Which of the following statements is true?

Correct AnswerverifiedShow Answer

Formwork for a concrete wall generally consists of

Correct AnswerverifiedShow Answer

Stirrups are used in a concrete beam

Correct AnswerverifiedShow Answer

Why is a shear key required in a construction joint?

Correct AnswerverifiedA shear key simulate...View AnswerShow Answer

Describe the differences between pretensioning and posttensioning of concrete. Is there any difference in the type of steel used in each case?

Correct AnswerAnswered by ExamLex AIPretensioning and posttensioning are two...View AnswerShow Answer

Explain what posttensioning of concrete is.

Correct AnswerverifiedTensioning (i.e., pulling), th...View AnswerShow Answer

A vapor retarder is required under

Correct AnswerverifiedShow Answer

How many wires are there in a typical prestressing monostrand?

Correct AnswerverifiedShow Answer

Using sketches and notes, explain the typical layout of reinforcement in a simply supported, reinforced- concrete beam.

Correct AnswerAnswered by ExamLex AIIn a simply supported, reinforced-concre...View AnswerShow Answer

Concrete shell roofs are not commonly used because

Correct AnswerverifiedShow Answer

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Pretension...
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In order to function as capillary break,...
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Correct Answer
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An isolation joint separates t...
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A vertical post to s...
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Answered by ExamLex AI
Concrete cover refers to the layer of co...
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Correct Answer
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Correct Answer
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A control joint responds to the shrinkag...
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Correct Answer
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Correct Answer
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Correct Answer
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A shear key simulate...
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Correct Answer
Answered by ExamLex AI
Pretensioning and posttensioning are two...
View Answer

Correct Answer
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Tensioning (i.e., pulling), th...
View Answer

Correct Answer
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Correct Answer
verified

Correct Answer
Answered by ExamLex AI
In a simply supported, reinforced-concre...
View Answer

Correct Answer
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