The hot water tank might be undersized for your usage.
how long does it take for hot water after lighting water tank its gas?
Sometimes natural gas heats your hot water tank.
No.
If it's a gas tank then that is possible.
No, cold water is piped into the hot water tank and is heated by electricity or gas, it then flows out to the hot water taps.
The part that generates heat... depending if it is a gas / electric heater
It has a compressor (like a refrig or air conditioner) which compresses a gas (freon) creating hot gas, This gas heats the hot water tank as it condenses to a liquid, The liquid then goes to the evaporator, where it boils back to a gas again, taking heat energy out of the cold water tank and cooling the water before returning to the compressor to start again. The hot water tank may have another heat source to boost the temperature higher.
It has a compressor (like a refrig or air conditioner) which compresses a gas (freon) creating hot gas, This gas heats the hot water tank as it condenses to a liquid, The liquid then goes to the evaporator, where it boils back to a gas again, taking heat energy out of the cold water tank and cooling the water before returning to the compressor to start again. The hot water tank may have another heat source to boost the temperature higher.
It has a compressor (like a refrig or air conditioner) which compresses a gas (freon) creating hot gas, This gas heats the hot water tank as it condenses to a liquid, The liquid then goes to the evaporator, where it boils back to a gas again, taking heat energy out of the cold water tank and cooling the water before returning to the compressor to start again. The hot water tank may have another heat source to boost the temperature higher.
If you have a leak on the hot water somewhere in the house and the water input into the tank is not running, the tank will lose it's water. And if it is an electric tank, the elements will burn out. Gas hot water tank should be no problem. Pressure valve does not have to be open.
It depends on if it's a gas water heater or electric. I don't think electric makes any noise, but a gas water heater, you'll the gas ignite, and hear the rushing gas from the burner.
That depends on how much water is drawn from the tank and how often it is drawn.