Question 1

Which of the following formula and equations are used to estimate frictional head losses in steady pipe flow?

Accepted Answer

A) Bernoulli equation 
B) Darcy Weisbach formula 
C) Hazen-Williams equation 
D) B. and C. 
A) Bernoulli equation 
B) Darcy Weisbach formula 
C) Hazen-Williams equation 
D) B. and C. D

Question 2

An important law of fluid mechanics is the conservation of energy. Which of the following equations best describes this law?

Accepted Answer

A) Bernoulli Equation 
B) Darcy-Weisbach Formula 
C) Hazen-Williams Formula 
D) None of the above 
A) Bernoulli Equation 
B) Darcy-Weisbach Formula 
C) Hazen-Williams Formula 
D) None of the above A

Question 3

Which of the following causes a pump to cavitate?

Accepted Answer

A) Improper lubrication 
B) Packing glands too tight 
C) Elevated thrust bearing temperature 
D) Inadequate or restricted supply 
A) Improper lubrication 
B) Packing glands too tight 
C) Elevated thrust bearing temperature 
D) Inadequate or restricted supply D

Question 4

The pressure at the bottom of a 75-foot column of water with a cross-sectional area of 18 inches2 is, approximately, which of the following?

Accepted Answer

A) 9.1 psi 
B) 20.0 psi 
C) 32.5 psi 
D) 48.8 psi 
A) 9.1 psi 
B) 20.0 psi 
C) 32.5 psi 
D) 48.8 psi

Question 5

Which of the following is the approximate head loss in a 1,500-foot long section of 6-inch diameter galvanized iron pipe conveying water at with a velocity of 5 feet/second? (Assume friction factor of 0.02)

Accepted Answer

A) 11.7 feet 
B) 23.3 feet 
C) 46.6 feet 
D) None of the above 
A) 11.7 feet 
B) 23.3 feet 
C) 46.6 feet 
D) None of the above

Question 6

A 10-inch diameter pipe is connected to an 18-inch diameter pipe. If the average velocity in the 10-inch diameter pipe is 25 feet per second (fps), what is the average velocity in the 18-inch diameter pipe?

Accepted Answer

A) 7.72 fps 
B) 13.89 fps 
C) 81.0 fps 
D) None of the above 
A) 7.72 fps 
B) 13.89 fps 
C) 81.0 fps 
D) None of the above

Question 7

The difference between the water surface elevations in a wet well and at a pump discharge is which of the following?

Accepted Answer

A) Dynamic head 
B) Static head 
C) Velocity head 
D) Drawdown 
A) Dynamic head 
B) Static head 
C) Velocity head 
D) Drawdown

Question 8

Pneumatic ejectors are often used in wastewater treatment plants. Which of the following descriptions best describes a pneumatic ejector?

Accepted Answer

A) A portable air compressor educator 
B) An air tool used to help loosen tight bolts 
C) A device which uses the pressure of compressed air to force a fluid to move 
D) None of the above 
A) A portable air compressor educator 
B) An air tool used to help loosen tight bolts 
C) A device which uses the pressure of compressed air to force a fluid to move 
D) None of the above

Question 9

With regards to energy losses caused by fittings, bends and valves in a piping system, which of the following statement is not correct?

Accepted Answer

A) These losses are minor in comparison to friction losses 
B) The loss factor is typically provided for specific devices 
C) Losses are proportional to the velocity of flow and geometry of the device 
D) None of the above 
A) These losses are minor in comparison to friction losses 
B) The loss factor is typically provided for specific devices 
C) Losses are proportional to the velocity of flow and geometry of the device 
D) None of the above

Question 10

What is the approximate outlet velocity of a vented tank that is 15 meters high?

Accepted Answer

A) 4.4 meters/second 
B) 17.2 meters /second 
C) 47.0 meters/second 
D) Not enough information given 
A) 4.4 meters/second 
B) 17.2 meters /second 
C) 47.0 meters/second 
D) Not enough information given

Which of the following formula and equations are used to estimate frictional head losses in steady pipe flow?

An important law of fluid mechanics is the conservation of energy. Which of the following equations best describes this law?

Which of the following causes a pump to cavitate?

The pressure at the bottom of a 75-foot column of water with a cross-sectional area of 18 inches2 is, approximately, which of the following?

Which of the following is the approximate head loss in a 1,500-foot long section of 6-inch diameter galvanized iron pipe conveying water at with a velocity of 5 feet/second? (Assume friction factor of 0.02)

A 10-inch diameter pipe is connected to an 18-inch diameter pipe. If the average velocity in the 10-inch diameter pipe is 25 feet per second (fps), what is the average velocity in the 18-inch diameter pipe?

The difference between the water surface elevations in a wet well and at a pump discharge is which of the following?

Pneumatic ejectors are often used in wastewater treatment plants. Which of the following descriptions best describes a pneumatic ejector?

With regards to energy losses caused by fittings, bends and valves in a piping system, which of the following statement is not correct?

What is the approximate outlet velocity of a vented tank that is 15 meters high?

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Exam 6: Hydraulics Closed

Which of the following formula and equations are used to estimate frictional head losses in steady pipe flow?

An important law of fluid mechanics is the conservation of energy. Which of the following equations best describes this law?

Which of the following causes a pump to cavitate?

The pressure at the bottom of a 75-foot column of water with a cross-sectional area of 18 inches2 is, approximately, which of the following?

Which of the following is the approximate head loss in a 1,500-foot long section of 6-inch diameter galvanized iron pipe conveying water at with a velocity of 5 feet/second? (Assume friction factor of 0.02)

A 10-inch diameter pipe is connected to an 18-inch diameter pipe. If the average velocity in the 10-inch diameter pipe is 25 feet per second (fps), what is the average velocity in the 18-inch diameter pipe?

The difference between the water surface elevations in a wet well and at a pump discharge is which of the following?

Pneumatic ejectors are often used in wastewater treatment plants. Which of the following descriptions best describes a pneumatic ejector?

With regards to energy losses caused by fittings, bends and valves in a piping system, which of the following statement is not correct?

What is the approximate outlet velocity of a vented tank that is 15 meters high?

Earth Retention

Earth Structures

Earthworks

Estimation

Foundations

Hydraulics Open

Hydrology

Material Mechanics

Material QC

Member Design

Scheduling

Soil and Materials

Soil Mechanics

Struct Loading

Struct Materials

Struct Analysis

Subsurface

Transportation

Waste Water

Water Treatment

Filters