Fluids

FE Review: Fluid Mechanics

by Prof. EMH Garcia

Other Disciplines

Civil Engineering

Multiple Choice

1. What is the pressure at a point 18,000 ft below the surface of the ocean?  $$\left(\gamma\ =\ 64.0\ \frac{lb}{ft^3}\right)$$  

• 1,150,000 psig

• 250 psig

• 8,000 psig

• 258,000 psig

Multiple Choice

2. For the barometer shown in the figure, what is the atmospheric pressure if $$h_{m\ }=\ 20\ cm,\ \rho_m=\ 13,550\ \frac{kg}{m^3},\ and\ p_{v\ }=\ 0\ kPa$$  ?

• 128 kPa

• 26.6 kPa

• 4.36 kPa

• 82.4 kPa

Multiple Choice

3. In the figure, what is the absolute pressure (pA) in vessel A?

• 15.8 psia

• 18.4 psia

• 13.6 psia

• 11.0 psia

Multiple Choice

4. Water flows through a 20-cm-diameter pipe. If the critical Reynolds number is 2,300, what is the maximum value of the average velocity for which laminar flow can be assumed?

• 0.047 m/s

• 1.2 m/s

• 0.0092 m/s

• 0.75 m/s

Multiple Choice

5. What is the coefficient of drag for a flow of air ( $$\rho=\ 1.225\ \frac{kg}{m^3},\ \mu=1.8\times10^{-5}\ \frac{N.s}{m^2}$$  ) over a flat plate that is 93 cm long, if $$V_{\infty}=86\ \frac{m}{s}$$  ?

• $$3.38\times10^{-3}$$  

• $$5.70\times10^{-3}$$  

• $$2.19\times10^{-3}$$  

• $$8.27\times10^{-3}$$  

Multiple Choice

6. Water flows through a 17-cm-diameter horizontal pipe ( $$\left(f=0.017\right)$$  at a rate of $$0.34\ \frac{m^3}{s}$$  . What is the frictional head loss per meter of pipe length?

• 1.31 m

• 1.14 m

• 0.02 m

• 0.78 m

Multiple Choice

7. What is the pumping power required for the system shown in the figure? (Neglect friction in the pipes.)

• 58,900 kW

• 65,400 kW

• 82,300 kW

• 53,000 kW

Multiple Choice

8. What is the Mach number of a fluid stream flowing at a velocity of 370 ft/s? (c = 1,080 ft/s)

• 0.66

• 2.92

• 0.34

• 3.4

Multiple Choice

9. For steady flow of a compressible fluid in the expander shown in the figure, what is the density at the exit section ( $$\rho_2$$  )?

• 190 kg/m3

• 62 kg/m3

• 642 kg/m3

• 127 kg/m3

Multiple Choice

10. What is the average velocity of the water entering the tee?

• 4.63 m/s

• 3.95 m/s

• 3.54 m/s

• 0.35 m/s

Multiple Choice

11. What is the for (F) required to keep the tee stationary?

• 5.66 N

• 2.21 N

• 6.32 N

• 7.41 N

Multiple Choice

12. If 16 kg/s of water, traveling at 67 m/s, enters the impulse turbine shown in the figure, which has a 26-cm diameter and a blade angle $$\alpha$$  of $$120\degree$$  , what is the maximum power that can be generated?

• 134 W

• 402 W

• 26.9 kW

• 8.98 kW

Multiple Choice

13. What is the volumetric flow rate (Q) of water ( $$\gamma=9,810\ \frac{N}{m^3}$$  ) for the venturi flow meter shown in the figure?

• 0.232 m3/s

• 0.248 m3/s

• 0.733 m3/s

• 0.467 m3/s