Answer each question and explain why you are shoosing that p

Answer each question and explain why you are shoosing that please?

1. The no-slip condition is caused by
a. velocity.
b. density.
c. gases.
d. friction.
2. Although there are many types of fittings, we can calculate the pressure drop caused by each one using
a. pump efficiency curves.
b. equivalent lengths.
c. sphericity factors.
d. a metric socket set.
3. The Ergun equation is valid for
a. laminar flow.
b. turbulent flow.
c. both laminar and turbulent flow.
d. neither laminar nor turbulent flow.

Solution

1.

no-slip condition occurs at zero velocity.

option A is correct answer.