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1. When the recoil of a gun ejects the fired powder case and reloads the gun, what do we call it?

   1.   ?    Automatic
   2.   ?    Fixed
   3.   ?    Semifixed
   4.   ?    Phalanx
   5.   ?    Booster

2. Dual-purpose ship guns are designed for engaging what types of targets?

   1.   ?    Air and Surface
   2.   ?    Surface and subsurface
   3.   ?    Air and subsurface
   4.   ?    Air targets only
   5.   ?    Surface targets only

3. Rifling is designed into the barrels of all guns currently used by the Navy. What does rifling do and what is the common direction of twist to the rifling?

   1.   ?    Causes the projectile to spin, right-hand
   2.   ?    Causes the projectile to spin, left-hand
   3.   ?    Causes the projectile to spin, over-hand
   4.   ?    Causes the projectile to roll, over-hand
   5.   ?    Causes the projectile to roll, under-hand

4. When a gun barrel is rifled, what do you call the raised areas in-between the grooves?

   1.   ?    Lands
   2.   ?    Cutout cams
   3.   ?    Arcs
   4.   ?    Ridges
   5.   ?    Guides

5. What term is used to describe gun barrel width in guns less than 3 inches in diameter?

   1.   ?    Caliber
   2.   ?    Elevation
   3.   ?    Train
   4.   ?    Battery
   5.   ?    Radius

6. A gun with a bore diameter of 3 inches and a barrel 150 inches long would have what caliber designation?

   1.   ?    50-caliber
   2.   ?    450-caliber
   3.   ?    150-caliber
   4.   ?    22-caliber
   5.   ?    The term "caliber" is only used to describe the bore diameter of guns less than 3 inches in width.

7. A 5-inch, 54-caliber gun has a barrel ________ long.

   1.   ?    270 inches
   2.   ?    27 feet
   3.   ?    54 inches
   4.   ?    54 feet
   5.   ?    5.4 feet

8. The total path through which a gun barrel can be raised and lowered is known as what?

   1.   ?    The arc of elevation
   2.   ?    The arc of train
   3.   ?    The cutout cam
   4.   ?    The deflection angle
   5.   ?    The arc of battery

9. What is the "Arc of Train"?

   1.   ?    The total horizontal arc through which a gun mount can be rotated.
   2.   ?    The total vertical arc through which a gun mount can be moved.
   3.   ?    The curved path followed by projectiles fired from guns.
   4.   ?    The initiating stage in a propellant train.
   5.   ?    The igniter or booster stage in a propellant train.

10. Stops incorporated in gun circuits to prevent guns from being fired when they are pointed at a part of the ship's structure are called what?

    1.   ?    Cutout cams
    2.   ?    Elevation arcs
    3.   ?    Train arcs
    4.   ?    Calibers
    5.   ?    Gun batteries

11. What is the name given to the entire structure between a gun and the ship or aircraft's structure?

    1.   ?    The gun mount
    2.   ?    The cutout cam
    3.   ?    The breech housing
    4.   ?    The breech-block
    5.   ?    The bore

12. A group of guns of the same size, normally controlled from the same point, are called what?

    1.   ?    A battery
    2.   ?    A gun group
    3.   ?    An element
    4.   ?    A breech-block
    5.   ?    A train of guns

13. Which of the following is NOT a limiting factor in determining the effective range of a gun?

    1.   ?    The gun's arc of train.
    2.   ?    The velocity of the projectile.
    3.   ?    The weight of the projectile.
    4.   ?    The caliber of the gun.
    5.   ?    The ability of the fire-control system to detect and track the target.

14. Which of the following is NOT one of the categories of naval guns?

    1.   ?    They are all categories of naval guns.
    2.   ?    None of these are categories of naval guns.
    3.   ?    Major
    4.   ?    Intermediate
    5.   ?    Minor

15. Which weapon system has shells weighing 72 pounds, can fire forty rounds per minute and a maximum range of 24,500 yards?

    1.   ?    5-inch/54-caliber single-mount guns.
    2.   ?    Oto Melara 3-inch/62-caliber dual-purpose guns.
    3.   ?    Phalanx close-in weapon system (CIWS) guns.
    4.   ?    8-inch/60-caliber single-mount guns.
    5.   ?    16-inch/50-caliber dual-mount guns.

16. Which weapons system below was designed to be a ship's last-ditch weapon against an antiship cruise missile?

    1.   ?    The Phalanx close-in weapons system.
    2.   ?    The Oto Melara 76 mm rapid-fire, dual-purpose mount.
    3.   ?    The 5-inch/54-caliber automatic, dual-purpose mount.
    4.   ?    The 8-inch/60-caliber single-mount gun.
    5.   ?    The 16-inch/50-caliber dual-mount gun.

17. What provides the thrust that ejects a projectile at the desired velocity from the muzzle of a gun?

    1.   ?    A propelling charge
    2.   ?    A burster charge
    3.   ?    A booster charge
    4.   ?    Bag ammunition
    5.   ?    An igniter

18. What type of ammunition is standard in 3-inch and smaller guns?

    1.   ?    Fixed
    2.   ?    Semifixed
    3.   ?    Bag
    4.   ?    Burster
    5.   ?    Automatic

19. What type of ammunition consists of a projectile and a separate case charge loaded one after the other?

    1.   ?    Semifixed
    2.   ?    Fixed
    3.   ?    Bag
    4.   ?    Booster
    5.   ?    Burster

20. What is the initiating stage in a propellant train called?

    1.   ?    The primer
    2.   ?    The booster
    3.   ?    The igniter
    4.   ?    The burster
    5.   ?    The starter

21. How do naval high-explosive projectiles primarily inflict damage?

    1.   ?    Through blast and fragmentation.
    2.   ?    Through blunt-force impact
    3.   ?    Through their degree of armor-piercing
    4.   ?    Through incendiary chemicals
    5.   ?    Through over-pressure

22. What name is given to the pointed noses of projectiles?

    1.   ?    Ogives
    2.   ?    Tips
    3.   ?    Ends
    4.   ?    Fuze
    5.   ?    Base

23. What are the three general classes of projectiles?

    1.   ?    Penetrating, fragmenting, and special purpose.
    2.   ?    Penetrating, illuminating, and special purpose
    3.   ?    Fragmenting, nonfragmenting and special purpose
    4.   ?    Special purpose, proximity, and fragmenting
    5.   ?    Fragmenting, Incendiary and illuminating

24. Which type of projectiles have relatively thin walls and large burster charges?

    1.   ?    Fragmenting
    2.   ?    Nonfragmenting
    3.   ?    Incendiary
    4.   ?    Penetrating
    5.   ?    Illuminating

25. What type of special purpose projectile is normally used to confuse enemy search and fire-control radar?

    1.   ?    Chaff
    2.   ?    Illuminating
    3.   ?    Incendiary
    4.   ?    Nonfragmenting
    5.   ?    Proximity-fuzed

26. What type of special-purpose projectile is commonly referred to as "star shells"?

    1.   ?    Illuminating
    2.   ?    Incendiary
    3.   ?    Chaff
    4.   ?    Nonfragmenting
    5.   ?    Penetrating

27. A "CVT" fuze is what type of fuze?

    1.   ?    Proximity
    2.   ?    Impact
    3.   ?    Time
    4.   ?    Fragmenting
    5.   ?    Chaff

28. "AP" projectiles fall into what class of projectiles?

    1.   ?    Penetrating
    2.   ?    Fragmenting
    3.   ?    Nonfragmenting
    4.   ?    Special Purpose
    5.   ?    Incendiary

29. Heavy antiaircraft barrages through which aircraft must fly to attack defended targets are called what?

    1.   ?    Flak
    2.   ?    Chaff
    3.   ?    Ogives
    4.   ?    Fuzes
    5.   ?    Shrapnel