OPM 101 TEST 3 PROF YUAN YE QUIZ ANSWERS | COMPLETE STUDY GUIDE & PRACTICE
QUESTIONS 2026/2027
During the two hours of the morning rush from 8 a.m. to 10 a.m., 100 customers per hour arrive
at the coffee shop. The coffee shop has a capacity of 80 customers per hour. What is the
number of customers waiting at 10 a.m.?
A. 100
B. 80
C. 40
D. 20 - ANS ✔✔40 (Queue growth rate = Demand - Capacity = 100 - 80 = 20. Length of queue at
10 a.m. = 2 × 20 = 40.)
During the two hours of the morning rush from 8 a.m. to 10 a.m., 100 customers per hour arrive
at the coffee shop. The coffee shop has a capacity of 80 customers per hour. How long does the
customer arriving at 10 a.m. have to wait to be served?
A. 2 hours
B. 1 hour
C. 0.5 hour
D. 0.25 hour - ANS ✔✔(Time to serve the customer arriving at 10 a.m. = T × (Demand/Capacity -
1) = 2 × (100/80 - 1) = 0.5.)
C. 0.5 hour
During the two hours of the morning rush from 8 a.m. to 10 a.m., 100 customers per hour arrive
at the coffee shop. The coffee shop has a capacity of 80 customers per hour. On average how
long does a customer arriving during the morning rush wait to be served?
A. 0.5 hour
B. 0.25 hour
C. 1 hour
, D. 2 hours - ANS ✔✔(Average waiting time = ½ × T × (Demand/Capacity - 1) = ½ × 2 × (100/80 -
1) = 0.25.)
B. 0.25 hour
Which of the following statements about queues is FALSE when demand exceeds supply?
A. The queue grows as long as the demand rate exceeds capacity and customers are willing to
wait.
B. The queue will shrink if customers walk away instead of waiting patiently in line.
C. The queue grows as long as the supply rate exceeds capacity.
D. If demand exceeds capacity for a longer period of time, the queue grows longer. - ANS ✔✔C.
The queue grows as long as the supply rate exceeds capacity.
One way to reduce a queue is to reduce ________ during ________ times.
A. demand, off-peak
B. supply, peak
C. demand, peak
D. supply, off-peak - ANS ✔✔C. demand, peak
What is the key assumption for the single-server queue model?
A. The average interarrival time is less than the average process time.
B. The flow rate is greater than the capacity.
QUESTIONS 2026/2027
During the two hours of the morning rush from 8 a.m. to 10 a.m., 100 customers per hour arrive
at the coffee shop. The coffee shop has a capacity of 80 customers per hour. What is the
number of customers waiting at 10 a.m.?
A. 100
B. 80
C. 40
D. 20 - ANS ✔✔40 (Queue growth rate = Demand - Capacity = 100 - 80 = 20. Length of queue at
10 a.m. = 2 × 20 = 40.)
During the two hours of the morning rush from 8 a.m. to 10 a.m., 100 customers per hour arrive
at the coffee shop. The coffee shop has a capacity of 80 customers per hour. How long does the
customer arriving at 10 a.m. have to wait to be served?
A. 2 hours
B. 1 hour
C. 0.5 hour
D. 0.25 hour - ANS ✔✔(Time to serve the customer arriving at 10 a.m. = T × (Demand/Capacity -
1) = 2 × (100/80 - 1) = 0.5.)
C. 0.5 hour
During the two hours of the morning rush from 8 a.m. to 10 a.m., 100 customers per hour arrive
at the coffee shop. The coffee shop has a capacity of 80 customers per hour. On average how
long does a customer arriving during the morning rush wait to be served?
A. 0.5 hour
B. 0.25 hour
C. 1 hour
, D. 2 hours - ANS ✔✔(Average waiting time = ½ × T × (Demand/Capacity - 1) = ½ × 2 × (100/80 -
1) = 0.25.)
B. 0.25 hour
Which of the following statements about queues is FALSE when demand exceeds supply?
A. The queue grows as long as the demand rate exceeds capacity and customers are willing to
wait.
B. The queue will shrink if customers walk away instead of waiting patiently in line.
C. The queue grows as long as the supply rate exceeds capacity.
D. If demand exceeds capacity for a longer period of time, the queue grows longer. - ANS ✔✔C.
The queue grows as long as the supply rate exceeds capacity.
One way to reduce a queue is to reduce ________ during ________ times.
A. demand, off-peak
B. supply, peak
C. demand, peak
D. supply, off-peak - ANS ✔✔C. demand, peak
What is the key assumption for the single-server queue model?
A. The average interarrival time is less than the average process time.
B. The flow rate is greater than the capacity.
