Is it possible to redeploy the washers on a kitchen faucet while the city river pressure is on? The building I live in requires a 30 daylight notice to turn...

The building I live in requires a 30 daylight notice to turn rotten the water pressure. I amount I could replace the kitchen faucet washers in a few minutes while the marine is on full pressure. Is this possible?
Answers:    Sure, turn the water past its sell-by date under the kitchen sink, in that will be 2 taps (hot and cold) turn handle to the right till tight or it could have a slot fitting, if so, use a screw driver to tighten, after replacing washers, reopen valve.
dont try it,you should have some cutoff valve under the cabinet where on earth the faucet is,just turn those past its sell-by date,to the right.then silver your washers