Only use 110-120 volt appliances on a 110 volt socket.
In North America a nominal voltage of 110 to 120 volts comes out of a normal wall socket.
No, a 240 volt string of Christmas lights is designed to be used with a 240 volt socket. Plugging it into a 110 volt socket may damage the lights and pose a safety hazard. Be sure to always use lights with the correct voltage rating.
If it can plug into the wall socket, then it has been designed for 110-120 volts of AC power and therefore will work. If you are talking about an oven the size of a dishwasher, than it may use a special higher voltage socket. A toaster oven will work just fine at 110V. If the appliance is not designed for the voltage, then the plug won't fit in the socket. I have never heard of an oven that uses only 350 watts though.
The voltage in a socket can be any voltage that you want. The load that connects into the socket must be stated. Without this information the question can not be answered.
110
If you have a quadruple 110 v socket, it can be replaced by a triple 120 v socket.
The maximum voltage you can draw from a 32 amp socket depends on the voltage rating of the socket. For example, if it is a standard 240-volt socket, the maximum voltage you can draw is 240 volts. It's important to check the voltage rating of the socket to ensure you are not exceeding its limits.
No. They are two different voltage and amperage rated pieces of equipment. Also, a dryer does not use a common (neutral) wire. It uses two separate 110 volt legs, and a ground. The washer uses only one 110 volt leg, a neutral, and a ground.
110 volts is the standard electrical voltage in the USA, so you will not damage your iron, when you plug it in. If the iron is dual voltage (110/230 volts), move the voltage selector switch to 110 volts before you use it in the USA. However, there are two diffferent types of electrical socket in North America (with or without earth grounding). For safety reasons, I would not recommend using your iron (anywhere in the world), unless the plug has a round earth pin, in addition to the two flat bladed pins.
The watches themselves use batteries and do not depend on the house voltage supply. It is important to have the correct charger suitable for the house voltage of 110 or 240 volts.
Carefully! Set your voltage meter to the nearest setting above 120 volt AC. Turn the power on to the socket. Take the lead marked "common" on your meter and touch it to the shell of the socket, that's the metal circular part which the lamp screws into. At the same time take the other "positive" meter lead and touch the tip of it to the brass electrode in the center top of the socket. You should read 110-120 volts. Be REAL careful no to cross your two meter leads or you'll create a dead short and it'll blow up in your face! Wear safety glasses when doing this.
No, you can not hook up a 12-110 volt inverter to a house socket.