Leaving your PC turned off for a long time should be perfectly safe, and cause no harm to the computer.
Before leaving the house, make sure to do a final walkthrough to ensure all lights are turned off.
The past tense of "turn off" is "turned off." For example, "I turned off the lights before leaving the room."
Make sure that the engine is turned off and all doors are locked.
according to my energy provider--you should if you are leaving home for more than 1 week.
The boiler pressure should be around 1 to 1.5 bar when the heating is turned off.
the answer is in the owners manual
I think Christmas lights should be turned off a few days after New Years day.
I don't know what kind of car you have but the heated seats in my Equinox shut off when the key is turned off.
The gas valve for the water heater should be turned on when you need hot water and off when you do not need hot water.
True; Make sure that the ESSID/SSID broadcast option is turned off at the access point!
In case of a gas leak emergency, the gas line should be turned off immediately to prevent further danger.