The internal ball has a hole through the center of it. When the valve is open, the hole...MORE is aligned with the direction of the water pipe, allowing water flow. When the handle is closed, the ball rotates 90Â° so the hole in the ball is blocked. This is quite a common type of valve on main water pipes. of 06. A gate valve describes the mechanism by which the valve is opened and closed. To turn a gate valve on or off, a circular handle is turned to raise or lowers a metal gate inside the valve body. When the valve is off the gate blocks the flow of water.
The Canadian Dollar (CAD) is the official currency of Canada. The symbol used for the Canadian Dollar is $, or C$ to distinguish it from other dollar currencies. The Canadian Dollar is subdivided into 100 cents. Canada is rated the 9th largest economy in the world.
Canadian bills are commonly available in denominations of 5, 10, 20, 50 and 100 dollars. One and two dollar coins called the loonie and the toonie are also used. Coins include the 25 cent quarter, the 10 cent dime, the five cent nickel and the one cent penny.