Quiz 1 Key

# Quiz 1 Key - %t 00 ‘4-2‘7-0 Quiz 1 CE 361 September 6...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: \%t 00 ‘4-2‘7-0 Quiz 1 CE 361 September 6, 2007 30 pts Available Name: BE SURE TO I LUDE ALL UNITS IN YOUR CALULATIONS AND SHOWALL WORK?! 1. Which of the following is NOT an extensive property? (Zpts) a. Velocity ~ b. Mass {/ c. Energy d. answers a and c 2. Water availability across the world is: (Zpts) a. Increasing b. Decreasing c. Unchanged d. Unknown 3. Reynolds Numbers is: (Zpts) a. A ratio between inertial and viscous forces b. The pizometric constant c. A ratio that determines the amount of surface tension d. A ratio between wave speed and gravity 4. An ideal fluid is defined as having: (2pts) a. Incompressibility b. No phase changes c. No viscosity d. Zero absolute pressure 5. Of the available freshwater, the majority consists in: (2pts) a. Rivers and lakes b. Groundwater c. Glaciers, permanent snow pack and permafrost d. Local pet store aquariums 6. The general control volume equation (Reynolds transport theorem) is: dB d ‘3“ = — dV + V - dA dt dt Ci ﬂp Ci ’6’0 a. Use the Reynolds Transport Theorem to produce a step by step derivation of the continuity equation for 1-D incompressible flow. Make sure to show all steps and substitutions. (4 pts) 5: W55 : m = dwxq’ b. In the continuity equation, what does the intensive property B represent? What does the extensive property [3 represent? (2pts) Exhale we. Massﬂmsive Property ~ n’tvx's we? Dmass/Dmassﬂiirrensr've Property c. Of the remaining components of the continuity equation, give a one or two sentence explanation of their meaning in relation to the control volume and control surface. Also explain how these processes are represented in a watershed. (3pts) I-The rate of change of extensive property stored in the control volume — A change in the amount of water stored in the watershed. Example: A reservoir in the watershed increasing/decreasing. 2-The net rate of outflow of extensive property through the control surface -Fluxes entering into the watershed through precipitation, groundwater ﬂow, streams, et 7. Three kilograms of air per second ﬂow through the pipe reducer shown below, the air in the 300-mm pipe has a specific weight of 9.8 N/m3. When ﬂowing through the reducer the air density decreases yielding a specific weight of 7.85 N/m3 in the ZOO—mm pipe. Compute (a) the weight flowrate, (b) the air density in the BOO-mm pipe, (c) the air density in the ZOO-mm pipe, (d) the air flowrate in the 300—mm pipe, (e) the air ﬂowrate in the ZOO—mm pipe, (f) does this system conserve mass? (6 points) ...
View Full Document

{[ snackBarMessage ]}

### Page1 / 3

Quiz 1 Key - %t 00 ‘4-2‘7-0 Quiz 1 CE 361 September 6...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online