Question 1

What is the unit of measure for modulus of elasticity in U.S. System of units? In SI System of units?

Accepted Answer

Pounds per sq in. (psi)or kips...

Question 2

Explain what is bearing strength of a material and how it differs from the material's compressive strength.

Accepted Answer

Bearing strength of a material refers to...

Question 3

Explain with the help of a three- dimensional sketch the reason for bending inefficiency, that is, why the strength of a material in a component is not fully utilized when the component is subjected to bending.

Accepted Answer

When a material is subjected to bending,...

Question 4

If the bar in Problem 2 is 10 ft long, determine the elongation in the bar. The modulus of elasticity of steel is 29 ×106 psi.

Accepted Answer

To determine the elongation of a bar, we...

Question 5

Explain the difference between an elastic material and a plastic material.

Accepted Answer

An elastic material returns to...

Question 6

What is the yield stress of grade 60 reinforcing steel?

Accepted Answer

A)  60 psi
B)  60 lb
C)  6,000 lb
D)  6,000 psi
E)  None of the aboveF) A) and D)
G) A) and B)

Question 7

Low- carbon (mild) steel is

Accepted Answer

A)  a plastic material.
B)  an elastic- plastic material.
C)  an elastic material.
D)  none of the above.E) A) and B)
F) A) and C)

Question 8

When we determine the strength of concrete using the test specimens, we determine the concrete's

Accepted Answer

A)  ultimate compressive stress.
B)  modulus of elasticity.
C)  ultimate tensile stress.
D)  ultimate shear stress.
E)  all of the above.F) B) and E)
G) A) and D)

Question 9

List the following materials (aluminum, concrete, steel, and wood)in terms of their ductility beginning with the most ductile and ending with the least ductile.

Accepted Answer

Steel
Alum...

Question 10

The bearing strength of a material is closely related to its

Accepted Answer

A)  bending strength.
B)  compressive strength.
C)  tensile strength.
D)  modulus of elasticity.
E)  none of the above.F) B) and E)
G) B) and C)

Question 11

Explain what resistance factor is in structural design.

Accepted Answer

Resistance factor is the second safety f...

Question 12

Does the slope of the stress- strain diagram relate to any property of the material? Explain.

Accepted Answer

The slope of the stress- strai...

Question 13

The stress- strain diagram of mild steel is nearly a straight line up to the yield point.

Accepted Answer

A) True 
 B)False

Question 14

In most materials, the safety margin for compressive stress and bending stress is the same.

Accepted Answer

A) True 
 B)False

Question 15

Why is an I- section beam structurally more efficient than a beam of rectangular cross section whose cross- sectional area is the same as that of an I- section beam?

Accepted Answer

An I- section beam is structurally more ...

Question 16

If the ultimate strength of a material is 6,000 psi and the factor of safety is 2.5, determine the allowable stress of the material.

Accepted Answer

The allowable stress of a material is th...

Question 17

Explain the difference between:
(a)elasticity and modulus of elasticity of a material.
(b)brittleness and ductility of materials.

Accepted Answer

(a) Elasticity refers to the ability of ...

Question 18

The allowable stress in a material is generally

Accepted Answer

A)  less than its ultimate stress.
B)  equal to its ultimate stress.
C)  greater than its ultimate stress.
D)  none of the above.E) A) and D)
F) None of the above

Question 19

The bending stresses along the neutral axis of a beam are

Accepted Answer

A)  zero.
B)  maximum.
C)  minimum.
D)  none of the above.E) A) and B)
F) None of the above

Question 20

What is the modulus of elasticity of a material whose stress- strain relationship is a vertical straight line? Name the material with such a stress- strain relationship.

Accepted Answer

The modulus of elasticity of s...

Exam 4: Load Resistance the Structural Properties of Materials

List the following materials (aluminum, concrete, steel, and wood)in terms of their ductility beginning with the most ductile and ending with the least ductile.

Correct AnswerverifiedSteelAlum...View AnswerShow Answer

What is the modulus of elasticity of a material whose stress- strain relationship is a vertical straight line? Name the material with such a stress- strain relationship.

Correct AnswerverifiedThe modulus of elasticity of s...View AnswerShow Answer

Explain what resistance factor is in structural design.

Correct AnswerverifiedResistance factor is the second safety f...View AnswerShow Answer

Low- carbon (mild) steel is

Correct AnswerverifiedShow Answer

Explain with the help of a three- dimensional sketch the reason for bending inefficiency, that is, why the strength of a material in a component is not fully utilized when the component is subjected to bending.

Correct AnswerAnswered by ExamLex AIWhen a material is subjected to bending,...View AnswerShow Answer

The bearing strength of a material is closely related to its

Correct AnswerverifiedShow Answer

When we determine the strength of concrete using the test specimens, we determine the concrete's

Correct AnswerverifiedShow Answer

Why is an I- section beam structurally more efficient than a beam of rectangular cross section whose cross- sectional area is the same as that of an I- section beam?

Correct AnswerverifiedAn I- section beam is structurally more ...View AnswerShow Answer

The stress- strain diagram of mild steel is nearly a straight line up to the yield point.

Correct AnswerverifiedShow Answer

If the bar in Problem 2 is 10 ft long, determine the elongation in the bar. The modulus of elasticity of steel is 29 ×106 psi.

Correct AnswerAnswered by ExamLex AITo determine the elongation of a bar, we...View AnswerShow Answer

The allowable stress in a material is generally

Correct AnswerverifiedShow Answer

In most materials, the safety margin for compressive stress and bending stress is the same.

Correct AnswerverifiedShow Answer

What is the unit of measure for modulus of elasticity in U.S. System of units? In SI System of units?

Correct AnswerverifiedPounds per sq in. (psi)or kips...View AnswerShow Answer

Explain what is bearing strength of a material and how it differs from the material's compressive strength.

Correct AnswerAnswered by ExamLex AIBearing strength of a material refers to...View AnswerShow Answer

If the ultimate strength of a material is 6,000 psi and the factor of safety is 2.5, determine the allowable stress of the material.

Correct AnswerAnswered by ExamLex AIThe allowable stress of a material is th...View AnswerShow Answer

Does the slope of the stress- strain diagram relate to any property of the material? Explain.

Correct AnswerverifiedThe slope of the stress- strai...View AnswerShow Answer

Explain the difference between an elastic material and a plastic material.

Correct AnswerverifiedAn elastic material returns to...View AnswerShow Answer

Explain the difference between: (a)elasticity and modulus of elasticity of a material. (b)brittleness and ductility of materials.

Correct AnswerAnswered by ExamLex AI(a) Elasticity refers to the ability of ...View AnswerShow Answer

The bending stresses along the neutral axis of a beam are

Correct AnswerverifiedShow Answer

What is the yield stress of grade 60 reinforcing steel?

Correct AnswerverifiedShow Answer

Correct Answer
verified
Steel
Alum...
View Answer

Correct Answer
verified
The modulus of elasticity of s...
View Answer

Correct Answer
verified
Resistance factor is the second safety f...
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Correct Answer
verified

Correct Answer
Answered by ExamLex AI
When a material is subjected to bending,...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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An I- section beam is structurally more ...
View Answer

Correct Answer
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If the bar in Problem 2 is 10 ft long, determine the elongation in the bar. The modulus of elasticity of steel is 29 ×10⁶ psi.

Correct Answer
Answered by ExamLex AI
To determine the elongation of a bar, we...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Pounds per sq in. (psi)or kips...
View Answer

Correct Answer
Answered by ExamLex AI
Bearing strength of a material refers to...
View Answer

Correct Answer
Answered by ExamLex AI
The allowable stress of a material is th...
View Answer

Correct Answer
verified
The slope of the stress- strai...
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Correct Answer
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An elastic material returns to...
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Correct Answer
Answered by ExamLex AI
(a) Elasticity refers to the ability of ...
View Answer

Correct Answer
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Correct Answer
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