LOG 104 Module 5 Exam: Designing and
Maintainability questions with correct answers
Which of the following is a benefit of vertical testability? CORRECT ANSWER -Lower Re-Test OK
(RTOK) and higher Bench Check Serviceable (BCS) rates
-Higher Re-Test OK (RTOK) and Bench Check Serviceable (BCS) rates
-*Lower Can Not Duplicate (CND), Bench Check Serviceable (BCS) and Re-Test OK (RTOK) rates*
-Increased combat capability and higher Can Not Duplicate (CND) rates
Condition Based Maintenance Plus (CBM+) is a comprehensive strategy to select, integrate, and
focus a number of process improvement capabilities. CORRECT ANSWER -*True*
-False
Which of the following defines Mean Down Time (MDT)? CORRECT ANSWER -*The average
elapsed time, clock hours, between loss of Mission Capable (MC) status and restoration of the
system to MC status*
-The amount of time the system is operational between repairs
-The weighted average of corrective and preventive "hands-on" maintenance times
-The time needed to perform maintenance tasks
A truck has an alternator and a battery. The alternator fails twice as often as the battery. The
alternator can be replaced in 30 minutes. The battery can be replaced in 60 minutes. Which of
the following is the reason the Mean Time to Repair (MTTR) for the truck is between 30 and 45
minutes? CORRECT ANSWER -Every truck repair takes somewhere between 30 and 45 minutes
-The 60-minute battery repairs outnumber the 30-minute alternator repairs
-There are an equal number of 30-minute and 60-minute repairs
-*The 30-minute alternator repairs outnumber the 60-minute battery repairs*
Maintainability questions with correct answers
Which of the following is a benefit of vertical testability? CORRECT ANSWER -Lower Re-Test OK
(RTOK) and higher Bench Check Serviceable (BCS) rates
-Higher Re-Test OK (RTOK) and Bench Check Serviceable (BCS) rates
-*Lower Can Not Duplicate (CND), Bench Check Serviceable (BCS) and Re-Test OK (RTOK) rates*
-Increased combat capability and higher Can Not Duplicate (CND) rates
Condition Based Maintenance Plus (CBM+) is a comprehensive strategy to select, integrate, and
focus a number of process improvement capabilities. CORRECT ANSWER -*True*
-False
Which of the following defines Mean Down Time (MDT)? CORRECT ANSWER -*The average
elapsed time, clock hours, between loss of Mission Capable (MC) status and restoration of the
system to MC status*
-The amount of time the system is operational between repairs
-The weighted average of corrective and preventive "hands-on" maintenance times
-The time needed to perform maintenance tasks
A truck has an alternator and a battery. The alternator fails twice as often as the battery. The
alternator can be replaced in 30 minutes. The battery can be replaced in 60 minutes. Which of
the following is the reason the Mean Time to Repair (MTTR) for the truck is between 30 and 45
minutes? CORRECT ANSWER -Every truck repair takes somewhere between 30 and 45 minutes
-The 60-minute battery repairs outnumber the 30-minute alternator repairs
-There are an equal number of 30-minute and 60-minute repairs
-*The 30-minute alternator repairs outnumber the 60-minute battery repairs*
