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

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