AO CORE UNIT 5 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026

AO CORE UNIT 5 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026 How many barrels does the M61A1 have? - Answers 6 barrels Where is M61A1 located? - Answers Located on the F/A 18 nose What is the M61A2? - Answers Same as the M61A1 except it weighs less. What is the GAU-12/U? - Answers Improved 5 barrel version of the M61A1 How much does the M61A1 weigh? - Answers 252 lbs How much does the M61A2 weigh? - Answers 106 lbs The __________ is Hydraulically driven & Electrically controlled. - Answers M61A1 What is the Encoder-decoder? - Answers Computer of M61A1, controls gun operation. What does the Rounds limiter switch do? - Answers It limits # of rounds fired per burst What does the GAU-12/U operate on? - Answers 28 VDC & 125 PSI AIR AV-8B Harrier - Answers How many barrels does the M197 20mm have? - Answers 3 barrels Describe the M197 20mm - Answers It has a fire rate of 300-1500 RPM Controlled by GCA (Gun Control Assembly) AH-1 Cobra M89E1 Series Feeder - Answers Gear driven, held by 2 quick release pins, has 3 sprockets To accelerate your time feed the stripper - Answers Accelerator, Stripper, feeder Acceleratir - Answers Is timed with the gun rotor Stripper - Answers Strips rounds away from the ammo belt Feeder - Answers Feeds rounds into gun Describe the M240 - Answers Left hand feed, gas operated, air-cooled, fixed head space weapon. The M240 has ________ basic configurations. - Answers 2 What are the 2 basic configuration for the M240 - Answers Aircraft: 2 hands Egress: pistol grip & battle stock (1 hand) *used by ground forces. *11-12 rounds per second GAU-16/A & XM-218 .50 caliber machine guns - Answers -Crew served, recoil operated -750-800 RPM -Used on V-22 aircraft, H-53, UH-1 (GAU-16/A only) and H-60 series helicopter. What are the differences between the GAU-16/A and the XM-218 - Answers GAU-16/A: front and backplate assembly XM-218: spade grip backplate GAU-17 7.62mm mini machine gun - Answers - crew served, electrically driven, six barrel - used on UH-1 & H-60 helos -max rate of 3000 RPM - capacity to store 4000 rounds of linked 7.62mm percussion-primed ammunition. Which machine gun is capable of firing without electrical power? - Answers GAU-17/A aircraft machine gun system GAU-21 .50 caliber machine gun - Answers -recoil operated -1025 RPM (max RATE) -6500 (max RANGE) -1850 (effective range) -installed on H-53 and H-60 What is the max RATE of the GAU-21 .50 caliber machine gun? - Answers 1025 RPM What is the max RANGE of the GAU-21 .50 caliber machine gun? - Answers 6500 m What is the EFFECTIVE RANGE of the GAU-21 .50 caliber machine gun? - Answers 1850 m M50/PGU - Answers - M61A1, M61A2, M197 - electrically primed - consist of: cartridge case, electric primer, propellant, projectile, fuze. What are the different types of classifications? - Answers - dummy - target practice (TP) - target practice tracer (TP-T) - high explosive incendiary (HEI) - high explosive incendiary tracer (HEI-T) Which classification is visible for 1280 yards. - Answers Target Practice Tracer (TP-T) How many cartridge cases are there? - Answers 2 What are the different types of cartridge cases? - Answers M103: made of brass M103B1: made of steel used w dummy M52A3B1 electric primer - Answers -consist of brass button, plastic liner (insulator) open-ended brass cup. -sensitive to shock. ____________ shall NOT be broken until the ammunition is to be used. (m548) - Answers Moisture seal 25mm PGU ammunition - Answers - used in the GAU-12 of the AV-8B Harrier -consist of: percussion primer, ignition booster pellet. Percussion primer: M115 Ignition booster pellet: 1B52 (25 Boost 1) M115 - Answers Percussion primer (25mm PGU) 1B52 - Answers Ignition booster pellet (25 Boost 1) 7.62 mm - Answers Used in M240 gun system and GAU-17 gun system .50 caliber - Answers Fixed-round family of ammunition Which gun is in the fixed- round family of ammunition? - Answers .50 caliber LALS 3 - Answers Loads linkless ammunition. -simultaneously loads and downloads 1800 rounds. - 3 bay liner linkless design lets user maintain the system easily What are the 2 major components of the LALS 3? - Answers Loader Transfer Ammunition loader contains ___ SRAs (Shop Replaceable Assemblies) - Answers 3 Ammunition loader contains ____ WRAs ( Weapons Replaceable assembly) - Answers 4 LALS is divided into _____ modes. - Answers 4 What are the 4 modes LALS is divided into? - Answers - replenishment (I-level) (refill the loader) - aircraft servicing (O-level) - transport - stowage BRU-12/A bomb rack - Answers - used on P-3 aircraft - capacity of 1450 lbs with 14in suspension. - free falls. (Not ejected) - LEMA: electrical release of the hooks (weapons/stores) * 12 3 45 (BRU-12 P-3 1450 lbs) BRU-14/A Bomb rack - Answers - used on P-3 and H-60 - 2200lb weigh capacity, 14in suspension - uses LEMA and IFOBRL (In flight operable bomb rack lock) What does LEMA stand for? - Answers Linear Electro-Mechanical Actuator What does IFOBRL stand for? - Answers In Flight Operable Bomb Rack Lock IFOBRL has ____ way to unlock. - Answers 3 What are the 3 ways to unlock IFOBRL? - Answers -Applying 28 VDC power - initiating auxiliary unlock system - manually turning aviation knob BRU-15/A - Answers - modified version of BRU-14/A - installed on wing station of P-3 aircraft - weight capacity of 2200lbs BRU-32 (momma rack) - Answers - used on F/A 18 YOU NEED THIS FIRST What are the 2 types of BRU-32? - Answers BRU-32 A/A : 2600lbs capacity BRU-32 B/A : 4200 lbs capacity What are the 2 ways of releasing? - Answers Primary Auxiliary Primary - Answers Fires 2 cartridges Auxiliary - Answers Fires 1 cartridge BRU-33 CVER (Canted Vertical Ejector Rack) - Answers - used to suspend 2 stores, each weighing up to 1000 lbs - f/a 18