During which case will the power loss be maximum? Explanation: A highly viscous oil will offer greater resistance due to which the power loss is maximum. As we know, oil has a greater density than water. Thus, oil is more viscous than water and corresponds to a higher loss of power.

Which of the factors primarily decide whether the flow in a circular pipe is laminar or turbulent?

Which of the factors primarily decide whether the flow in a circular pipe is laminar or turbulent? Explanation: High Reynolds number flows (> 4000) are turbulent flows, whereas low Reynolds number flows (< 2100) are laminar flows.

Which among the following is formula for friction factor of circular pipes?

Explanation: circular pipes have a diameter treated in a round manner. for a fluid flow which is laminar head loss is directly proportional to the fluid velocity. thus, friction factor is inversely proportional to its velocity. therefore, the correct option is '64/re'.