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No, you cannot.
Army Combat Uniform. The actual camouflage pattern which appears on the ACU is known as the Universal Camouflage Pattern or ACU Digital Camouflage.
No, they are not, although units may allow it if the ACU is being worn as a PT uniform, in conjunction with tennis shoes. Otherwise, you may not wear white socks with the ACU uniform.
Depends on your rank and the uniform. On the Class A uniform and dress blues, enlisted personnel wear fabric insignia on the sleeves, whereas officers wear pin-on insignia on the epaulets. On the Class B uniform, Private (E2), Private First Class (E3), and Specialist (E4) would wear metallic insignia pinned through the collar, whereas Corporal and higher would wear shoulder boards on the epaulets. On the older Battle Dress Uniforms (BDUs) and Desert Combat Uniform (DCU), rank insignia would be worn on the collar points. On the current Army Combat Uniform (ACU), it is worn on a velcro tab on the front of the uniform. Officers and Warrant Officers wear their rank insignia on the beret, whereas enlisted personnel wear their regimental crest. Rank insignia is usually sewn onto helmet covers - however, this is often a moot point, as the placement of the rank insignia on the kevlar helmet often leaves it covered by the mounting plates for night vision goggles.
Yes, they do, except for the Army Combat Uniform, which does not have epaulets.
It is Not worn on a combat uniform.<<< This is not true, the CIB is worn on the left side of the ACU (Army Combat Uniform) above the U.S. ARMY name tape.
No, because Naval units do not typically wear shoulder sleeve insignia (patches). There are exceptions to this rule, however. If the Naval unit was under an Army command they may be authorized the shoulder sleeve insignia, former wartime service (combat patch) of the Army command to which they were assigned.
No. Basic trainees usually don't wear any unit insignia on their ACUs (or other uniforms), as they're not yet assigned to any units. It is still very much a uniform.
It's not sewn, it's pinned on.
ACU'S and some units are starting to get multicam
The only time you'll ever be allowed to do this is the first time you get a marksmanship badge awarded when you're at Basic Combat Training. At the end of the qualification range, you'll take it off, and never wear it on your ACUs again.
Yes, combat boots can be used as snow boots. The ACU boots will work, but not as well as BDU boots.