Complete Practice Question Bank: Shigley's Mechanical
Engineering Design, 12th Edition
1. Which of the following best defines the term "Design" in mechanical engineering?
A) The process of fabricating a mechanical component
B) The iterative decision-making process to create a device or system that meets specified needs
C) The analysis of existing machines to determine their failure points
D) The selection of materials for a product based solely on cost
Answer: B
Explanation: Design is an iterative decision-making process that involves creating plans and
specifications for devices or systems that perform desired functions safely, efficiently, and economically.
2. Mechanical engineering design primarily differs from other engineering design disciplines in that it
____.
A) focuses only on electrical systems
B) deals with components in motion requiring power transmission
C) avoids the use of materials science
D) relies exclusively on computer simulations
Answer: B
Explanation: Mechanical engineering design specifically addresses machine elements and mechanisms
that involve motion, forces, power transmission, and energy transfer.
,3. The design process typically begins with which phase?
A) Material selection
B) Detailed drawing
C) Problem definition and need identification
D) Prototype testing
Answer: C
Explanation: The design process always begins with clearly defining the problem and identifying the
need for a solution before any technical work proceeds.
4. Which factor is MOST critical when designing for safety?
A) Minimizing material usage to reduce costs
B) Ensuring a factor of safety appropriate for potential failure consequences
C) Adding as many safety features as possible regardless of cost
D) Designing with zero possibility of failure
Answer: B
Explanation: A proper factor of safety balances the consequences of failure (economic, environmental,
human) with realistic design constraints. Zero failure possibility is impossible in engineering.
,5. Iteration in the design process refers to ____.
A) repeating the same calculation multiple times
B) cycling through design stages, refining the solution each time
C) the final approval step before manufacturing
D) testing a single prototype until it breaks
Answer: B
Explanation: Iteration is the repeated looping through design phases, where each iteration improves
upon the previous, converging on an optimal solution.
6. The "design for manufacturing" principle emphasizes ____.
A) designing components that are easy to produce with available processes
B) ignoring production costs during design
C) using the strongest material available regardless of processability
D) designing complex features that showcase engineering skill
Answer: A
Explanation: DFM integrates manufacturing considerations early in design, ensuring parts can be
produced economically and reliably with available processes.
, 7. Which of the following is NOT typically considered a design constraint?
A) Budget limitations
B) Material strength requirements
C) The engineer's personal aesthetic preference
D) Legal and regulatory standards
Answer: C
Explanation: Design constraints include economic, technical, legal, environmental, and social factors.
Personal aesthetic preferences are subjective and not binding constraints.
8. The phrase "design is an iterative decision-making process" emphasizes that each design decision
____.
A) is final once made
B) may need revisiting as new information emerges
C) must be approved by a committee
D) is independent of other decisions
Answer: B
Explanation: The iterative nature means earlier decisions can be modified based on later analysis, trade-
offs, and new insights.
Engineering Design, 12th Edition
1. Which of the following best defines the term "Design" in mechanical engineering?
A) The process of fabricating a mechanical component
B) The iterative decision-making process to create a device or system that meets specified needs
C) The analysis of existing machines to determine their failure points
D) The selection of materials for a product based solely on cost
Answer: B
Explanation: Design is an iterative decision-making process that involves creating plans and
specifications for devices or systems that perform desired functions safely, efficiently, and economically.
2. Mechanical engineering design primarily differs from other engineering design disciplines in that it
____.
A) focuses only on electrical systems
B) deals with components in motion requiring power transmission
C) avoids the use of materials science
D) relies exclusively on computer simulations
Answer: B
Explanation: Mechanical engineering design specifically addresses machine elements and mechanisms
that involve motion, forces, power transmission, and energy transfer.
,3. The design process typically begins with which phase?
A) Material selection
B) Detailed drawing
C) Problem definition and need identification
D) Prototype testing
Answer: C
Explanation: The design process always begins with clearly defining the problem and identifying the
need for a solution before any technical work proceeds.
4. Which factor is MOST critical when designing for safety?
A) Minimizing material usage to reduce costs
B) Ensuring a factor of safety appropriate for potential failure consequences
C) Adding as many safety features as possible regardless of cost
D) Designing with zero possibility of failure
Answer: B
Explanation: A proper factor of safety balances the consequences of failure (economic, environmental,
human) with realistic design constraints. Zero failure possibility is impossible in engineering.
,5. Iteration in the design process refers to ____.
A) repeating the same calculation multiple times
B) cycling through design stages, refining the solution each time
C) the final approval step before manufacturing
D) testing a single prototype until it breaks
Answer: B
Explanation: Iteration is the repeated looping through design phases, where each iteration improves
upon the previous, converging on an optimal solution.
6. The "design for manufacturing" principle emphasizes ____.
A) designing components that are easy to produce with available processes
B) ignoring production costs during design
C) using the strongest material available regardless of processability
D) designing complex features that showcase engineering skill
Answer: A
Explanation: DFM integrates manufacturing considerations early in design, ensuring parts can be
produced economically and reliably with available processes.
, 7. Which of the following is NOT typically considered a design constraint?
A) Budget limitations
B) Material strength requirements
C) The engineer's personal aesthetic preference
D) Legal and regulatory standards
Answer: C
Explanation: Design constraints include economic, technical, legal, environmental, and social factors.
Personal aesthetic preferences are subjective and not binding constraints.
8. The phrase "design is an iterative decision-making process" emphasizes that each design decision
____.
A) is final once made
B) may need revisiting as new information emerges
C) must be approved by a committee
D) is independent of other decisions
Answer: B
Explanation: The iterative nature means earlier decisions can be modified based on later analysis, trade-
offs, and new insights.
