MSSC-M3 Manufacturing Processes
Practice Exam 2 Questions and
Answers with Rationales
Question 1
Which manufacturing process removes material from a workpiece to
create a desired shape or dimension?
A. Casting
B. Machining
C. Forging
D. Injection molding
Answer: B. Machining
Explanation:
Machining is a subtractive manufacturing process in which material is
removed from a workpiece. Common machining operations include
turning, milling, drilling, grinding, and sawing. The objective is usually
to achieve a specific geometry, dimension, surface finish, or tolerance.
Question 2
What is the primary purpose of a manufacturing process plan?
A. To determine employee salaries
B. To specify how a product will be manufactured
C. To determine the selling price only
D. To replace quality inspections
Answer: B. To specify how a product will be manufactured
,Explanation:
A process plan identifies the sequence of manufacturing operations
required to produce a component. It may specify machines, tools,
materials, operating parameters, inspections, and other requirements. A
well-developed process plan helps ensure consistent production and
efficient use of resources.
Question 3
Which process uses a mold into which molten material is poured and
allowed to solidify?
A. Casting
B. Milling
C. Grinding
D. Rolling
Answer: A. Casting
Explanation:
Casting involves pouring molten material—commonly metal—into a
mold cavity. As the material cools and solidifies, it takes the shape of the
cavity. Casting is particularly useful for producing complex shapes that
may be difficult or expensive to machine from solid material.
Question 4
What is the main difference between hot working and cold working of
metals?
A. Hot working uses plastic; cold working uses metal
B. Hot working occurs at elevated temperatures, while cold working
occurs below the material's recrystallization temperature
,C. Cold working always melts the material
D. There is no difference
Answer: B. Hot working occurs at elevated temperatures, while cold
working occurs below the material's recrystallization temperature
Explanation:
Hot working is performed at sufficiently high temperatures that the
metal can undergo significant deformation without substantial strain
hardening. Cold working is performed at lower temperatures and can
increase strength and hardness through strain hardening. Cold working
can also improve dimensional accuracy and surface finish.
Question 5
Which machine tool rotates a workpiece while a cutting tool removes
material from its surface?
A. Lathe
B. Drill press
C. Milling machine
D. Surface grinder
Answer: A. Lathe
Explanation:
A lathe primarily rotates the workpiece while a cutting tool is moved
against it. Turning, facing, boring, threading, and related operations can
be performed on a lathe. Lathes are especially useful for producing
cylindrical or rotational components.
Question 6
, What is the purpose of cutting fluid during machining?
A. To increase electrical resistance
B. To cool and lubricate the cutting process
C. To permanently harden every workpiece
D. To eliminate the need for tooling
Answer: B. To cool and lubricate the cutting process
Explanation:
Cutting fluids can reduce heat generated during machining and decrease
friction between the cutting tool, workpiece, and chips. Depending on
the operation and fluid, they can also help flush chips away and improve
tool life and surface finish.
Question 7
Which machining operation is commonly used to create a cylindrical
hole?
A. Drilling
B. Facing
C. Turning
D. Planing
Answer: A. Drilling
Explanation:
Drilling uses a rotating drill bit to create a hole in a workpiece.
Subsequent operations such as reaming, boring, or tapping may be
performed when a particular hole size, accuracy, surface finish, or
internal thread is required.
Practice Exam 2 Questions and
Answers with Rationales
Question 1
Which manufacturing process removes material from a workpiece to
create a desired shape or dimension?
A. Casting
B. Machining
C. Forging
D. Injection molding
Answer: B. Machining
Explanation:
Machining is a subtractive manufacturing process in which material is
removed from a workpiece. Common machining operations include
turning, milling, drilling, grinding, and sawing. The objective is usually
to achieve a specific geometry, dimension, surface finish, or tolerance.
Question 2
What is the primary purpose of a manufacturing process plan?
A. To determine employee salaries
B. To specify how a product will be manufactured
C. To determine the selling price only
D. To replace quality inspections
Answer: B. To specify how a product will be manufactured
,Explanation:
A process plan identifies the sequence of manufacturing operations
required to produce a component. It may specify machines, tools,
materials, operating parameters, inspections, and other requirements. A
well-developed process plan helps ensure consistent production and
efficient use of resources.
Question 3
Which process uses a mold into which molten material is poured and
allowed to solidify?
A. Casting
B. Milling
C. Grinding
D. Rolling
Answer: A. Casting
Explanation:
Casting involves pouring molten material—commonly metal—into a
mold cavity. As the material cools and solidifies, it takes the shape of the
cavity. Casting is particularly useful for producing complex shapes that
may be difficult or expensive to machine from solid material.
Question 4
What is the main difference between hot working and cold working of
metals?
A. Hot working uses plastic; cold working uses metal
B. Hot working occurs at elevated temperatures, while cold working
occurs below the material's recrystallization temperature
,C. Cold working always melts the material
D. There is no difference
Answer: B. Hot working occurs at elevated temperatures, while cold
working occurs below the material's recrystallization temperature
Explanation:
Hot working is performed at sufficiently high temperatures that the
metal can undergo significant deformation without substantial strain
hardening. Cold working is performed at lower temperatures and can
increase strength and hardness through strain hardening. Cold working
can also improve dimensional accuracy and surface finish.
Question 5
Which machine tool rotates a workpiece while a cutting tool removes
material from its surface?
A. Lathe
B. Drill press
C. Milling machine
D. Surface grinder
Answer: A. Lathe
Explanation:
A lathe primarily rotates the workpiece while a cutting tool is moved
against it. Turning, facing, boring, threading, and related operations can
be performed on a lathe. Lathes are especially useful for producing
cylindrical or rotational components.
Question 6
, What is the purpose of cutting fluid during machining?
A. To increase electrical resistance
B. To cool and lubricate the cutting process
C. To permanently harden every workpiece
D. To eliminate the need for tooling
Answer: B. To cool and lubricate the cutting process
Explanation:
Cutting fluids can reduce heat generated during machining and decrease
friction between the cutting tool, workpiece, and chips. Depending on
the operation and fluid, they can also help flush chips away and improve
tool life and surface finish.
Question 7
Which machining operation is commonly used to create a cylindrical
hole?
A. Drilling
B. Facing
C. Turning
D. Planing
Answer: A. Drilling
Explanation:
Drilling uses a rotating drill bit to create a hole in a workpiece.
Subsequent operations such as reaming, boring, or tapping may be
performed when a particular hole size, accuracy, surface finish, or
internal thread is required.
