Maintenance Test 2026 – Mechanical Systems, Troubleshooting, and Safety
Fundamentals Study Guide
Draw the trains concept - correct answer ✔✔ Probably worth 25 points or anywhere between
20 and 75.
What is a MAC (Maintenance Allocation Chart)? (Define) - correct answer ✔✔ -"Designates
overall authority and responsibility for performance of maintenance functions on an item of
equipment"
-Indicates tools/equipment needed and estimated man-hours for repair
-Located in appendix B of equipment TMs
List the two levels of maintenance. - correct answer ✔✔ Field Maintenance
Sustainment Maintenance
Define field maintenance in your own words. - correct answer ✔✔ "On System":
-Maintenance replacing components; Repair and return end items for immediate use by the
user (supported unit)
-Tactical, Operator / Crew, Field Mechanics
Define sustainment maintenance in your own words. - correct answer ✔✔ "Off System"
-Repair major end items to national standard and return them to the supply system
-Installation, Depot (a distinct sub-set), Contractor Activities
Describe a MEL (Maintenance Expenditure Limit) in your own words. - correct answer ✔✔
Maintenance Expenditure Limit
, -The total acceptable one-time cost to repair an end item or reparable component to a fully
serviceable condition as prescribed in the appropriate TM.
-Current MELs and MEL procedures are listed in the TB 43-0002 series, TB 750 series, and
guidance in paragraph 6-39
-Reviewed at least annually
Describe a BDAR in your own words. - correct answer ✔✔ Battle Damage Assessment and
Repair
-The procedure used to rapidly return disabled equipment to the operational commander by
field-expedient repair of components
-Accomplished by bypassing components or safety devices, cannibalizing parts from like or
lower priority equipment, fabricating repair parts, jerry-rigging, taking shortcuts to standard
maintenance, and using substitute fluids, materials or components.
List the characteristics of Depot repair - correct answer ✔✔ -Subset of sustainment
maintenance
-Performed by Tables of Distribution Allowances (TDA) industrial-type activities
-Can also be performed by contract installation support activity
-Repair and return to supply system at national level, or, by exception, to theater of using unit
Overhaul & Rebuild
-Overhaul: restore equipment or components to completely serviceable condition with
measurable life expectancy
-Rebuild: near zero time and/or zero mile maintenance process; end item-total tear down &
replace all expendable, aged, & reconditioning of components
Fundamentals Study Guide
Draw the trains concept - correct answer ✔✔ Probably worth 25 points or anywhere between
20 and 75.
What is a MAC (Maintenance Allocation Chart)? (Define) - correct answer ✔✔ -"Designates
overall authority and responsibility for performance of maintenance functions on an item of
equipment"
-Indicates tools/equipment needed and estimated man-hours for repair
-Located in appendix B of equipment TMs
List the two levels of maintenance. - correct answer ✔✔ Field Maintenance
Sustainment Maintenance
Define field maintenance in your own words. - correct answer ✔✔ "On System":
-Maintenance replacing components; Repair and return end items for immediate use by the
user (supported unit)
-Tactical, Operator / Crew, Field Mechanics
Define sustainment maintenance in your own words. - correct answer ✔✔ "Off System"
-Repair major end items to national standard and return them to the supply system
-Installation, Depot (a distinct sub-set), Contractor Activities
Describe a MEL (Maintenance Expenditure Limit) in your own words. - correct answer ✔✔
Maintenance Expenditure Limit
, -The total acceptable one-time cost to repair an end item or reparable component to a fully
serviceable condition as prescribed in the appropriate TM.
-Current MELs and MEL procedures are listed in the TB 43-0002 series, TB 750 series, and
guidance in paragraph 6-39
-Reviewed at least annually
Describe a BDAR in your own words. - correct answer ✔✔ Battle Damage Assessment and
Repair
-The procedure used to rapidly return disabled equipment to the operational commander by
field-expedient repair of components
-Accomplished by bypassing components or safety devices, cannibalizing parts from like or
lower priority equipment, fabricating repair parts, jerry-rigging, taking shortcuts to standard
maintenance, and using substitute fluids, materials or components.
List the characteristics of Depot repair - correct answer ✔✔ -Subset of sustainment
maintenance
-Performed by Tables of Distribution Allowances (TDA) industrial-type activities
-Can also be performed by contract installation support activity
-Repair and return to supply system at national level, or, by exception, to theater of using unit
Overhaul & Rebuild
-Overhaul: restore equipment or components to completely serviceable condition with
measurable life expectancy
-Rebuild: near zero time and/or zero mile maintenance process; end item-total tear down &
replace all expendable, aged, & reconditioning of components
