Water Engineering: Hydraulics, Distribution and Treatment 2nd. Edition by Lawrence K. Wang, Nazih K. Shammas | 9780470390986 | 0470413034 | Holooly

Water and Wastewater Engineering, Hydraulic

Water Engineering: Hydraulics, Distribution and Treatment

234 SOLVED PROBLEMS

Question: 24.6

CAPITAL RECOVERY FACTOR The city has obtained a federal loan of USD 500,000 for a water works renovation project. Determine the equal annual payments that will be necessary to amortize and repay the debt in 10 years at an interest rate of 4%. ...

Verified Answer:

R = Ai(1 + i)

^{10}

/[(1 + i)

^...

Question: 24.5

DISCOUNTED SERIES PAYMENT Determine the present worth amount, which is invested at 4% interest compounded annually over a 10-year period and will produce an income or payments of USD 50,000 a year for each of the 10 years. ...

Verified Answer:

PV = (R/i)[(1 + i)

^{n}

− 1]/(1 + i)...

Question: 24.4

PRESENT VALUE FOR COST COMPARISON Two equally qualified consulting engineering firms, A and B, are bidding for a city’s water works project, and both agree to be paid in full after the design project is completed. The engineering firm A can complete the project in 2 years and will charge USD 29,000 ...

Verified Answer:

The present value of firm A’s service charge: PV =...

Question: 24.3

SINKING FUND TO PAY A CONSULTANT With a mutual agreement, a city is to retire a debt to a consulting engineer by establishing a sinking fund of USD 24,000, for a 3-year period at 4% interest rate compounded annually. What is the annual amount the city must put aside to retire the debt after 3 years ...

Verified Answer:

R = Ai/[(1 + i)

^{n}

− 1]. R = 24,00...

Question: 24.2

ANNUITY OF UNIFORM SERIES What is the future worth of USD 20,000 invested by a city each year for 5 years at an interest rate of 3% compounded annually? ...

Verified Answer:

A = (R/i)[(1 + i)

^{n}

− 1]. A = (20...

Question: 24.1

FUTURE VALUE CALCULATION What is the future value or a single repayment requirement after 5 years for a USD 20,000 loan (such as a municipal bond) with a 3% annual interest rate? ...

Verified Answer:

FV = P(1 + i)

^{n}

. FV = 20,000(1 + ...

Question: 23.2

ASSESSMENT OF RISK Assess the risk for an automated mountain climbing rig. ...

Verified Answer:

A sample FMECA is illustrated in Fig. 23.13. The s...

Question: 23.1

DEVELOPMENT OF A RISK ASSESSMENT MATRIX Figure 23.9 shows a typical risk assessment matrix. Interpret the severity and probability steps for this matrix. ...

Verified Answer:

Figure 23.10 shows sample interpretations of the s...

Question: 22.4

ACTION PLAN FOR WATER SYSTEM STRUCTURAL DAMAGE/PHYSICAL ATTACK Formulate an action plan (AP) in case of contamination of a water system listing the special actions and notifications to be taken for the following threat conditions: Threat warning received Is the threat possible? (Stage 1) Is the ...

Verified Answer:

Question: 22.3

ACTION PLAN FOR WATER SYSTEM CONTAMINATION Formulate an action plan (AP) in case of contamination of a water system listing the special actions and notifications to be taken for the following threat conditions: Threat warning received Is the threat possible? (Stage 1) Is the threat credible? (Stage ...

Verified Answer:

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