Dari buku Moran, Michael J., Saphiro, Howard N., 1995., Fundamentals of engineering thermodynamics., Wiley., USA

Diketahui :

P(absolut) Tank A    = 267.7 kPa

P (gauge) Tank A    = 140 kPa

Densitas merkur      = 13.59 g/cm³

P (ATM)                  = 101 kPa

Gravitasi                 = 9,81 m/s²

Ditanya :

1.      Tekana absolut pada Tank B ?

2.      Tinggi U tube manometer yang terisi merkuri ?

Jawab :

1.      P(absolut) = P (gauge) + P (ATM)

      267.7 kPa = 140 kPa + P(absolut tank B)

      P(absolut tank B) = 267.7 kPa - 140 kPa = 127.7 kPa

2.      Mencari pressure gauge tank A, P (gauge B) di kurangi P (ATM)

P (gauge B) = 127.7 kPa - 101 kPa = 26.7 kPa = 26700 Pa

       P (gauge B) = ρ x g x h

26700 Pa= 13590 Kg/m³ x 9,81 m/s² x L (m)

L = 26700Pa / (13590 Kg/m³ x 9,81 m/s² )

                           = 2,0048 m = 200,48 cm