BSIE Bachelor of Science in Industrial Engineering MCQ 2 — Questions and Answers
Question 1: In a single-server queuing system (M/M/1), what happens to the average waiting time as the traffic intensity (ρ) approaches 1?
- It decreases to zero
- It approaches infinity (Correct answer)
- It stabilizes at the service rate
- It equals the inter-arrival time
Correct answer: It approaches infinity
As ρ → 1, the queue length and waiting time grow without bound, making the system unstable.
Question 2: Which ergonomic principle states that workstations should be designed to fit the 5th to 95th percentile of the user population?
- Design for the average user
- Design for the extreme user
- Design for adjustability (Correct answer)
- Design for the critical user
Correct answer: Design for adjustability
Designing for adjustability accommodates the broadest range of users by allowing the workstation to be modified to fit individual needs.
Question 3: In Six Sigma methodology, a process operating at 6 sigma quality level produces approximately how many defects per million opportunities (DPMO)?
- 3.4 (Correct answer)
- 66,800
- 233
- 6,210
Correct answer: 3.4
A Six Sigma process, with a 1.5 sigma shift, yields approximately 3.4 DPMO.
Question 4: The Wagner-Whitin algorithm is used to solve which type of inventory problem?
- Continuous review with fixed order quantity
- Dynamic lot sizing with time-varying demand (Correct answer)
- Newsvendor single-period ordering
- Multi-echelon safety stock optimization
Correct answer: Dynamic lot sizing with time-varying demand
The Wagner-Whitin algorithm finds the optimal lot-sizing policy when demand varies across planning periods.
Question 5: Which simulation technique is most appropriate for modeling systems where state changes occur at discrete points in time?
- Monte Carlo simulation
- Discrete-event simulation (Correct answer)
- System dynamics modeling
- Agent-based simulation
Correct answer: Discrete-event simulation
Discrete-event simulation tracks system state changes that occur at specific event times, making it ideal for queuing and manufacturing systems.
Question 6: In the context of facilities layout, the Systematic Layout Planning (SLP) method uses a relationship chart that rates the closeness desirability between departments using letters. Which letter represents 'absolutely necessary' closeness?
- I
- E
- A (Correct answer)
- O
Correct answer: A
In SLP's AEIOUX scale, 'A' stands for 'Absolutely necessary,' the highest closeness rating.
Question 7: A reliability block diagram has two components in parallel, each with reliability R. What is the system reliability?
- R²
- 2R - R² (Correct answer)
- R/2
- 1 - (1-R)
Correct answer: 2R - R²
For two parallel components, system reliability = 1 - (1-R)(1-R) = 2R - R².
BSIE Bachelor of Science in Industrial Engineering MCQ 2
In a single-server queuing system (M/M/1), what happens to the average waiting time as the traffic intensity (ρ) approaches 1?