TSM 241 Midterm Exam Questions
with Correct Answers
Which one of the following types of stress strain relationship best describes the
behavior of brittle materials such as ceramics and thermosetting plastics? - Answer-
Perfectly elastic
Most hardness tests involve pressing a hard object into the surface of a test specimen
and measuring the resulting indentation or its effect. - Answer-True
Which one of the following materials has the highest modulus of elasticity? - Answer-
Diamond
The shear strength of a metal is commonly determined in which one of the following
tests? - Answer-Torsion Test
The modulus of elasticity is also known as which one of the following? - Answer-
Young's modulus
A tensile test uses a test specimen that has a gage length of 50 mm and an area = 225
mm2. During the test, the specimen yields under a load of 99,102 N. The corresponding
gage length = 50.4 mm - this is at the 0.2 percent yield point. The maximum load of
169,072 N is reached at a gage length = 60 mm. If fracture occurs at a gage length of
66 mm, determine the percent elongation in % - enter your answer as a whole number,
not as a fraction. - Answer-32
A tensile test uses a test specimen that has a gage length of 50 mm and an area = 218
mm2. During the test, the specimen yields under a load of 97,786 N. The corresponding
gage length = 50.28 mm - this is at the 0.2 percent yield point. The maximum load of
164,404 N is reached at a gage length = 61 mm. If fracture occurs at a gage length of
71 mm, determine the yield strength in MPa. - Answer-449
A tensile test uses a test specimen that has a gage length of 50 mm and an area = 225
mm2. During the test, the specimen yields under a load of 95,371 N. The corresponding
gage length = 50.33 mm - this is at the 0.2 percent yield point. The maximum load of
165,281 N is reached at a gage length = 62 mm. Fracture occurs at a gage length of 70
mm. If the speciman necked to an area of 98.9 mm2determine the percent reduction in
area - enter your answer as a whole number, not as a fraction. - Answer-56.044
, Which one of the following reinforcing geometries offers the greatest potential for
improving strength and stiffness in the resulting composite material? - Answer-
Continuous fibers
Which of the following materials are used as fibers in fiber reinforced plastics (four
correct answers)? - Answer-boron, aluminum oxide, e-glass, kevlar
In some composite materials, a third ingredient is added to promote bonding of the
primary and secondary phases. This third ingredient is called which one of the
following? - Answer-Interphase
Anisotropic means which one of the following? - Answer-properties vary depending on
the direction in which they are measured
Most plastic molding compounds include fillers and therefore can be classified as
polymer matrix composites. - Answer-True
A fiberglass composite is composed of a matrix of vinyl ester and reinforcing fibers of E-
glass. The volume fraction of E-glass is 42%. The remainder is vinyl ester. The density
of the vinyl ester is 0.776 g/cm3, and its modulus of elasticity is 4.94 GPa. The density
of E-glass is 2.633 g/cm3, and its modulus of elasticity is 74 GPa. A section of
composite 1.00 cm by 25.00 cm by 200.00 cm is fabricated with the E-glass fibers
running longitudinal along the 200 cm direction. Assume there are no voids in the
composite. Determine the modulus of elasticity of the composite in GPa. - Answer-
33.945
There are varying degrees of protection for many types of PPE, like heat-resistant
gloves. The PPE should be matched with the task being completed. - Answer-True
Never leave a machine while it is _____. - Answer-Running or in operation
Generally speaking, an inverse relationship exists between the variety of goods a
factory produces and the quantity of goods the factory produces. - Answer-True
Annual production quantities between 1 to 100 units per year are generally classified as
_____ production volumes. - Answer-Low
Manufacturing industries that cultivate and exploit natural resources such as agriculture
and mining are considered _____ industries. - Answer-Primary
Manufacturing industries that process or convert natural resources into consumer and
capital goods are considered _____ industries. - Answer-Secondary
The quantity of products a factory produces affects its layout, production schedule, and
organization. - Answer-True
with Correct Answers
Which one of the following types of stress strain relationship best describes the
behavior of brittle materials such as ceramics and thermosetting plastics? - Answer-
Perfectly elastic
Most hardness tests involve pressing a hard object into the surface of a test specimen
and measuring the resulting indentation or its effect. - Answer-True
Which one of the following materials has the highest modulus of elasticity? - Answer-
Diamond
The shear strength of a metal is commonly determined in which one of the following
tests? - Answer-Torsion Test
The modulus of elasticity is also known as which one of the following? - Answer-
Young's modulus
A tensile test uses a test specimen that has a gage length of 50 mm and an area = 225
mm2. During the test, the specimen yields under a load of 99,102 N. The corresponding
gage length = 50.4 mm - this is at the 0.2 percent yield point. The maximum load of
169,072 N is reached at a gage length = 60 mm. If fracture occurs at a gage length of
66 mm, determine the percent elongation in % - enter your answer as a whole number,
not as a fraction. - Answer-32
A tensile test uses a test specimen that has a gage length of 50 mm and an area = 218
mm2. During the test, the specimen yields under a load of 97,786 N. The corresponding
gage length = 50.28 mm - this is at the 0.2 percent yield point. The maximum load of
164,404 N is reached at a gage length = 61 mm. If fracture occurs at a gage length of
71 mm, determine the yield strength in MPa. - Answer-449
A tensile test uses a test specimen that has a gage length of 50 mm and an area = 225
mm2. During the test, the specimen yields under a load of 95,371 N. The corresponding
gage length = 50.33 mm - this is at the 0.2 percent yield point. The maximum load of
165,281 N is reached at a gage length = 62 mm. Fracture occurs at a gage length of 70
mm. If the speciman necked to an area of 98.9 mm2determine the percent reduction in
area - enter your answer as a whole number, not as a fraction. - Answer-56.044
, Which one of the following reinforcing geometries offers the greatest potential for
improving strength and stiffness in the resulting composite material? - Answer-
Continuous fibers
Which of the following materials are used as fibers in fiber reinforced plastics (four
correct answers)? - Answer-boron, aluminum oxide, e-glass, kevlar
In some composite materials, a third ingredient is added to promote bonding of the
primary and secondary phases. This third ingredient is called which one of the
following? - Answer-Interphase
Anisotropic means which one of the following? - Answer-properties vary depending on
the direction in which they are measured
Most plastic molding compounds include fillers and therefore can be classified as
polymer matrix composites. - Answer-True
A fiberglass composite is composed of a matrix of vinyl ester and reinforcing fibers of E-
glass. The volume fraction of E-glass is 42%. The remainder is vinyl ester. The density
of the vinyl ester is 0.776 g/cm3, and its modulus of elasticity is 4.94 GPa. The density
of E-glass is 2.633 g/cm3, and its modulus of elasticity is 74 GPa. A section of
composite 1.00 cm by 25.00 cm by 200.00 cm is fabricated with the E-glass fibers
running longitudinal along the 200 cm direction. Assume there are no voids in the
composite. Determine the modulus of elasticity of the composite in GPa. - Answer-
33.945
There are varying degrees of protection for many types of PPE, like heat-resistant
gloves. The PPE should be matched with the task being completed. - Answer-True
Never leave a machine while it is _____. - Answer-Running or in operation
Generally speaking, an inverse relationship exists between the variety of goods a
factory produces and the quantity of goods the factory produces. - Answer-True
Annual production quantities between 1 to 100 units per year are generally classified as
_____ production volumes. - Answer-Low
Manufacturing industries that cultivate and exploit natural resources such as agriculture
and mining are considered _____ industries. - Answer-Primary
Manufacturing industries that process or convert natural resources into consumer and
capital goods are considered _____ industries. - Answer-Secondary
The quantity of products a factory produces affects its layout, production schedule, and
organization. - Answer-True
