Question { HPCL, 17711 }

How do you measure g's?

Answer

Acceleration caused by gravity is called G-force and expressed in G's,

A man in rocket travelling against gravitational (into sky) experiences extra body weight or simply extra 'g'

And if he jumps from that rocket (free falling) he feels no weight or simply 0-g's

Question { HPCL, 17711 }

How do you measure g's?

Answer

G's or G-force can be easily measured using Accelerometers.

Piezo electric type Accelerometer and damped mass and spring assembly Accelerometers are most commonly used.

Question { Jindal, 26703 }

why the steam drum and deaerator level transmitter range is
in negative MMWC to zero

Answer

Range is Negative mmWC to Zero because we are using "Wet leg configuration" arrangement. In which LP side of transmitter is contains a Condesate Pot always filled-in with water.

Wet leg configuration is used when the tanks contain CONDENSABLE VAPOURS, these vapours when entered impulse lines may be condensed over time and get accumulated. This accumulated liquids in impulse line creates Pressure head resulting error in level measurement. to avoid this suituation we initially fill LP side impulse line with water ( or a condensate pot is used to condense vapour and fill impulse line automatically).

Question { 4271 }

what is the sp.gravity of sand?

Answer

Specific Gravity depends on density of that particular sand., not all kinds of sand have same density..

Specific Gravity= (density of sand / density of pure water)