the nozzle will rupture
when the piston comes to top dead center or in full up position the valves must be closed if they are open the piston will hit the valve and bend it this usually happens from a valve timing issue by a slipped timing belt or chain. sometimes though this will happen if the valve sticks open from a bad valve spring
The "curb stop" is the valve that is on the service from the main into your house. i.e. The 8" main in the street has a saddle tap with your 3/4" service line on it. Within 8 ft of the connection between your service and the main is your curb stop. The curb stop is a valve buried underground. In order to open/close the valve a curb box is placed over the valve. It is essentially a metal tube that lets you open and close the curb stop.
If the engine were to backfire for whatever reason and the pcv valve is stuck open, the backfire could carry into the crank case and ignite the crank case fumes. I have seen valve covers blown off an engine from this situation.
Yes, you should, it helps air get in to flush more quickly.
The saddle valve is open.
To determine if a valve is open or closed, you can visually inspect the position of the valve handle or lever. If the handle is parallel to the pipe, the valve is open. If the handle is perpendicular to the pipe, the valve is closed.
To open the tank valve on an oxygen cylinder, make sure the regulator is attached securely. Slowly turn the valve counterclockwise until it is fully open. Always open the valve slowly to prevent damage to the regulator or sudden release of high-pressure gas.
To manually open a sprinkler valve, locate the valve box and remove the lid. Turn the solenoid counterclockwise to open the valve manually. Be sure to turn it back clockwise to close the valve once you are done.
To open a water valve, turn the handle or lever in a clockwise direction until it is fully open.
The gas valve is closed.
the amount of valve open after T.D.C and B.D.C.
It's the part that actually pushes a valve to open it.