# Effect of cross-section area of pipe on total energy of system- Hydraulics & Pneumatics

**Q. Why according to Bernoulli's principle, change in cross-section area of the pipe has no effect on total energy of the system?***- Published on 17 Aug 15***a.** when area of pipe increases upstream, kinetic energy of fluid decreases as velocity of fluid increases and potential energy increases

**b.** when area of pipe increases upstream, kinetic energy of fluid decreases as velocity of fluid decreases and potential energy increases

**c.** when area of pipe increases upstream, kinetic energy of the fluid increases as velocity of fluid decreases and potential energy decreases

**d.** when area of pipe increases upstream, kinetic energy of fluid increases as velocity of fluid increases and potential energy decreases

**ANSWER: when area of pipe increases upstream, kinetic energy of fluid decreases as velocity of fluid decreases and potential energy increases**