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COB 300 OPERATIONS ACTUAL EXAM
PREP 2026 | 100 QUESTIONS AND
CORRECT DETAILED ANSWERS
|ALREADY A GRADED | NEW AND
REVISED
A machine is made of three key components: A, B, and C. Reliabilities
of A, B, and C are 0.96, 0.95, and 0.98 respectively. There is an
additional component, B", which has a reliability of 0.9 and works as a
backup unit for component B. What is the overall reliability of the
machine? - ANSWER- 93.61%
In which variant of the generic product development process are the
cleaning products? - ANSWER- Process-intensive products
The main focus of quality function deployment (QFD) is: - ANSWER-
To get the voice of the customer into the design of a product
Consider a business that can be run using either a make-to-stock or a
make-to-order process. The manufacturing lead-time is quite short. The
approximate demand is 10,000 per month and it is spread out evenly
throughout the month. The processing capacity is 15,000 per month.
Based on information, which one would you choose? - ANSWER-
Make-to-order
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A financial institution's back office processes credit applications. Each
application goes through four stages (in a sequence) as shown in the
figure below. One person works at each stage and the time that person
takes (at each stage) to process one application is shown in the figure. If
the office needs to start working on a new application every five minutes
on an average, which of the following stage(s) will be blocking? -
ANSWER- Stage 3 (the one not allowing the previous one to move on
when finished)
A financial institution's back office processes credit applications. Each
application goes through four stages (in a sequence) as shown in the
figure below. One person works at each stage and the time that person
takes (at each stage) to process one application is shown in the figure.
What is the maximum number of applications that can be processed in
an eight-hour shift? - ANSWER- 80 (# of times the bottleneck stage can
be completed in 8 hours)
A financial institution's back office processes credit applications. Each
application goes through four stages (in a sequence) as shown in the
figure below. One person works at each stage and the time that person
takes (at each stage) to process one application is shown in the figure.
Now the office has decided to put TWO (2) persons (each with equal
capacity as before) instead of ONE at stage 3. If the office needs to start
working on a new application every five minutes on an average, how
many work-in-progress applications are expected to be accumulated in
front of Stage 3 after 5 hours of work (if 2 persons work at Stage 3)? -
ANSWER- None (zero)
Currently, a retailer receives a particular item once every 30 days from
its supplier. Each item costs $12 and in each year approximately 21,600
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items are sold. The retailer tries to keep few extra items as safety stock
and at the time of receiving replenishment there are already 200 items
(i.e. ENDING inventory of 200). If replenishment is received ONCE
EVERY 30 DAYS, what is the INVENTORY TURN? Use 360 days in a
year in your calculation. - ANSWER- 21.6
In a manufacturing facility, machine A has a 45-minute set-up time per
batch and a 1.5-minute per unit run time. Machine B performs the
identical function but has a 15-minute set-up time and a 2-minute run
time per unit. The manufacturing facility makes products in batches
ranging from 1 unit to 100 units. Assume capacity is not a limitation on
either machine, in order to minimize the total processing time, on which
batches should machine B be used. - ANSWER- Batches of fewer than
60 units should be run on machine B
After a job shop is successfully converted into a cellular layout (i.e.
work cell), which one of the following is usually true? - ANSWER-
Inventory decreases while equipment utilization increases.
Ritz-Carlton Hotel is a good example of the following: - ANSWER-
Personal attention approach
A university admitting only students with minimum SAT score can be
considered as an example of: - ANSWER- Classic Reduction
Lost production time, scrap, and rework are examples of: - ANSWER-
Internal failure costs
COB 300 OPERATIONS ACTUAL EXAM
PREP 2026 | 100 QUESTIONS AND
CORRECT DETAILED ANSWERS
|ALREADY A GRADED | NEW AND
REVISED
A machine is made of three key components: A, B, and C. Reliabilities
of A, B, and C are 0.96, 0.95, and 0.98 respectively. There is an
additional component, B", which has a reliability of 0.9 and works as a
backup unit for component B. What is the overall reliability of the
machine? - ANSWER- 93.61%
In which variant of the generic product development process are the
cleaning products? - ANSWER- Process-intensive products
The main focus of quality function deployment (QFD) is: - ANSWER-
To get the voice of the customer into the design of a product
Consider a business that can be run using either a make-to-stock or a
make-to-order process. The manufacturing lead-time is quite short. The
approximate demand is 10,000 per month and it is spread out evenly
throughout the month. The processing capacity is 15,000 per month.
Based on information, which one would you choose? - ANSWER-
Make-to-order
,2|Page
A financial institution's back office processes credit applications. Each
application goes through four stages (in a sequence) as shown in the
figure below. One person works at each stage and the time that person
takes (at each stage) to process one application is shown in the figure. If
the office needs to start working on a new application every five minutes
on an average, which of the following stage(s) will be blocking? -
ANSWER- Stage 3 (the one not allowing the previous one to move on
when finished)
A financial institution's back office processes credit applications. Each
application goes through four stages (in a sequence) as shown in the
figure below. One person works at each stage and the time that person
takes (at each stage) to process one application is shown in the figure.
What is the maximum number of applications that can be processed in
an eight-hour shift? - ANSWER- 80 (# of times the bottleneck stage can
be completed in 8 hours)
A financial institution's back office processes credit applications. Each
application goes through four stages (in a sequence) as shown in the
figure below. One person works at each stage and the time that person
takes (at each stage) to process one application is shown in the figure.
Now the office has decided to put TWO (2) persons (each with equal
capacity as before) instead of ONE at stage 3. If the office needs to start
working on a new application every five minutes on an average, how
many work-in-progress applications are expected to be accumulated in
front of Stage 3 after 5 hours of work (if 2 persons work at Stage 3)? -
ANSWER- None (zero)
Currently, a retailer receives a particular item once every 30 days from
its supplier. Each item costs $12 and in each year approximately 21,600
, 3|Page
items are sold. The retailer tries to keep few extra items as safety stock
and at the time of receiving replenishment there are already 200 items
(i.e. ENDING inventory of 200). If replenishment is received ONCE
EVERY 30 DAYS, what is the INVENTORY TURN? Use 360 days in a
year in your calculation. - ANSWER- 21.6
In a manufacturing facility, machine A has a 45-minute set-up time per
batch and a 1.5-minute per unit run time. Machine B performs the
identical function but has a 15-minute set-up time and a 2-minute run
time per unit. The manufacturing facility makes products in batches
ranging from 1 unit to 100 units. Assume capacity is not a limitation on
either machine, in order to minimize the total processing time, on which
batches should machine B be used. - ANSWER- Batches of fewer than
60 units should be run on machine B
After a job shop is successfully converted into a cellular layout (i.e.
work cell), which one of the following is usually true? - ANSWER-
Inventory decreases while equipment utilization increases.
Ritz-Carlton Hotel is a good example of the following: - ANSWER-
Personal attention approach
A university admitting only students with minimum SAT score can be
considered as an example of: - ANSWER- Classic Reduction
Lost production time, scrap, and rework are examples of: - ANSWER-
Internal failure costs
