Only gas engines use blow off valves.
1
No, without a turbo, there is no blow off valve. However, if you really wanted to, they have fake blow off valves for sale. These mimic the sound of a blow off valve. It would be an absolute waste of money, but hey, it's your money.
Nope. Blow off valves vent to the atmosphere (loud), a bypass does not.
A gagging tool is used on the water drum safety valves for the pressure setting. The safety valves are gagged one by one and the blow off presure is set for the other.
to make it easyer for them to breathe
Pop Off Valves
next to the blow off switch
This depends on the situation. If he likes you, he probably will not blow you off.
Yes
No.
Some times on/off valves are to large to be actuated using one solenoid valve,but most of the on/off valves are being actuated using only one solenoid valve