A Bank of 10 Machines Requires Regular Periodic Service

question 42

Multiple Choice

A bank of 10 machines requires regular periodic service. Machine running time and service time are both exponential. Machines run for an average of 44 minutes between service requirements, and service time averages six minutes per machine. What is the average machine downtime with two operators?

• A).24.
• B)3.46 minutes
• C)6.25 minutes
• D)7.71 minutes
• E)9.46 minutes

---

Definitions:

Three-Way Catheter

A urinary catheter with three channels, for inflating a balloon to keep the catheter in place, urine drainage, and irrigation of the bladder.

Irrigate

The process of washing out an area or wound with a stream of fluid.

Urinary Elimination

The process by which the kidneys filter waste from the blood and transport urine to the bladder for excretion.

Ileal Conduit

A surgical procedure to create a pathway for urine to exit the body through the abdominal wall after removal of the bladder.