An opening provided in the side or bottom of a tank for the purpose of discharging the liquid contained in a tank is known as
AMouthpiece
BNotch
COrifice
DWeir
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Consider the following statements relating to the stability of a floating as well as submerged bodies 1. A submerged body is stable when the centre of gravity is below centre of buoyancy 2. A floating body is stable when the centre of gravity is above the centre of buoyancy 3. The floating body is stable when the centre of gravity is below the meta centre 4. A submerged body is in stable equilibrium when the centre of gravity coincides with the centre of buoyancy, of these statements
Pantagraph is used for