4b431 1504 Civ Sqs Water Resources 74 2

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Copyright © 2014 by NCEES. All rights reserved. All NCEES sample questions and solutions are copyrighted under the laws of the United States. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means without the prior written permission of NCEES. Requests for permissions should be addressed in writing to [email protected] or to NCEES Exam Publications, PO Box 1686, Clemson, SC 29633. ISBN 978-1-932613-74-2 Printed in the United States of America October 2014 First Printing


iii

CONTENTS

Introduction to NCEES Exams.................................................................. 1

About NCEES

Updates on exam content and procedures

Exam-day schedule

Admission to the exam site

Examinee Guide

Scoring and reporting

Staying connected

Exam Specifications .................................................................................... 3

Civil AM Practice Exam ................................................................... 11

Water Resources and Environmental PM Practice Exam ............ 33

Civil AM Solutions ........................................................................... 53

Water Resources and Environmental PM Solutions .................... 73


1

About NCEES The National Council of Examiners for Engineering and Surveying (NCEES) is a nonprofit organization made up of engineering and surveying licensing boards from all U.S. states and territories. Since its founding in 1920, NCEES has been committed to advancing licensure for engineers and surveyors in order to protect the health, safety, and welfare of the American public. NCEES helps its member licensing boards carry out their duties to regulate the professions of engineering and surveying. It develops best-practice models for state licensure laws and regulations and promotes uniformity among the states. It develops and administers the exams used for engineering and surveying licensure throughout the country. It also provides services to help licensed engineers and surveyors practice their professions in other U.S. states and territories. Updates on exam content and procedures Visit us at ncees.org/exams for updates on everything exam-related, including specifications, exam-day policies, scoring, and corrections to published exam preparation materials. This is also where you will register for the exam and find additional steps you should follow in your state to be approved for the exam. Exam-day schedule Be sure to arrive at the exam site on time. Late-arriving examinees will not be allowed into the exam room once the proctor has begun to read the exam script. The report time for the exam will be printed on your Exam Authorization. Normally, you will be given 1 hour between morning and afternoon sessions. Admission to the exam site To be admitted to the exam, you must bring two items: (1) your Exam Authorization and (2) a current, signed, government-issued identification. Examinee Guide The NCEES Examinee Guide is the official guide to policies and procedures for all NCEES exams. All examinees are required to read this document before starting the exam registration process. You can download it at ncees.org/exams. It is your responsibility to make sure that you have the current version. NCEES exams are administered in either a computer-based format or a pencil-and-paper format. Each method of administration has specific rules. This guide describes the rules for each exam format. Refer to the appropriate section for your exam. Scoring and reporting NCEES typically releases exam results to its member licensing boards 8–10 weeks after the exam. Depending on your state, you will be notified of your exam result online through your MyNCEES account or via postal mail from your state licensing board. Detailed information on the scoring process can be found at ncees.org/exams. Staying connected To keep up to date with NCEES announcements, events, and activities, connect with us on your preferred social media network.


11

CIVIL AM PRACTICE EXAM



Copyright 2014 by NCEES 13 GO ON TO THE NEXT PAGE

7. ORDER & DELIVER METAL BUILDING30 DAYS

10 DAYSSTART 10 DAYS

15 DAYS

10 DAYS 10 DAYS FINISH

5. INSTALL FINISHELEMENTS

4. ERECT BUILDING

5 DAYS

35 DAYS

6. PROCURE REINFORCING

STEEL7 DAYS

1. EXCAVATE FOOTINGS

2. FORM & POUR FOOTINGS

8. ROUGH INELECTRIC &PLUMBING

3. GRADE & POUR SLABON GRADE

9. PROCURE MISCELLANEOUS BUILDING ELEMENTS

A B C D E F

104. A CPM arrow diagram is shown below. Nine activities have been estimated with durations ranging from 5 to 35 days. The minimum time (days) required to finish the project is most nearly:

(A) 40 (B) 42 (C) 45 (D) 50

105. A bridge is to be jacked up to replace its bearings. The design requires a hydraulic ram with a

minimum capacity of 1,000 kN (kilonewtons). The hydraulic rams that are available are rated in tons (2,000 lb/ton). The minimum size (tons) ram to use is most nearly:

(A) 1,110 (B) 250 (C) 150 (D) 100




131. The Standard Penetration Test (SPT) is widely used as a simple and economic means of obtaining which of the following?

(A) A measurement of soil compressibility expressed in terms of a compression index

(B) A direct measurement of the undrained shear strength

(C) An indirect indication of the relative density of cohesionless soils

(D) A direct measurement of the angle of internal friction 132. A department of transportation must remove and replace a 12-ft 20-ft concrete slab on an

interstate facility. To minimize disruption to traffic, the work must be completed during an 8-hour nighttime work shift. Nighttime temperatures average 50F. If the minimum required compressive strength is 3,500 psi, the concrete mix would most likely consist of:

(A) coarse aggregate, sand, Type II cement, chemical accelerator

(B) sand, Type III cement, water, chemical accelerator

(C) coarse aggregate, sand, Type V cement, water, chemical accelerator

(D) coarse aggregate, sand, Type III cement, water, chemical accelerator 133. Fatigue in steel can be the result of:

(A) a reduction in strength due to cyclical loads

(B) deformation under impact loads

(C) deflection due to overload

(D) expansion due to corrosion


33

WATER RESOURCES AND ENVIRONMENTAL PM PRACTICE EXAM




501. An industry is proposing to discharge its effluent into a nearby stream. Average design flow rates and the BOD5 of its wastewater and the stream are as follows:

Parameter Wastewater Stream Flow rate BOD5

10 MGD 100 mg/L

100 cfs 2 mg/L

The in-stream BOD5 standard for the area is 5 mg/L. The effluent BOD5 removal required to meet this standard is most nearly: (A) 95% (B) 76% (C) 67% (D) 54%

502. Three upflow clarifiers each have a diameter of 30 ft. If the total average flow for the combined

clarifiers is 2 MGD, the overflow rate (gpd/ft2) for each clarifier is most nearly:

(A) 250 (B) 950 (C) 2,850 (D) 8,500

503. A 60-ft-diameter aerobic digester with an 8-ft side wall depth treats 20,000 gpd of thickened

secondary sludge that has a 2% solids concentration and is 75% volatile matter. The volatile solids loading rate lb/(ft3-day) is most nearly: (A) 0.148 (B) 0.111 (C) 0.028 (D) 0.013




518. A stormwater collection system drains the areas shown into a lake. Using the rational method for determining peak flow, the time of concentration Tc (min) that should be used to determine the peak discharge at the point where the pipe discharges into the lake is most nearly:

(A) 13 (B) 16 (C) 21 (D) 43

519. A basic assumption of the rational method for determining peak runoff from a watershed is that peak

runoff for a given rainfall intensity:

(A) occurs if rainfall duration is equal to or greater than the time of concentration

(B) is independent of the rainfall intensity

(C) occurs only if peak discharge per unit area increases as the drainage area increases

(D) occurs if rainfall duration is less than the time of concentration

Drainage Zone A B C D Area, acres Tc for overland flow in this zone, min Velocity in pipe, fps

10 10

12 12 3.2

11 12 3.6

9 7 3.9

A B

1 2 3 4

C D

LAKE

400 ft 400 ft 400 ft


63

CIVIL AM SOLUTIONS


CIVIL AM SOLUTIONS

66

7 4 5+ +Activities:

30 + 10 + 10 = 50 daysDays:

30 ft

50 ft40 ft

x

104. Reference: Nunnally, Construction Methods and Management, 8th ed., 2011, pp. 282285.

THE CORRECT ANSWER IS: (D)

105. Reference: Ricketts, Loftin, and Merritt, Standard Handbook for Civil Engineers, 5th ed.,

p. 4.11.

1 ton1,000 kN 1,000 kN 112.4 tons

8.896444 kN

150 tons > 112.4 tons THE CORRECT ANSWER IS: (C)

106. Reference: Shapiro, Shapiro, and Shapiro, Cranes and Derricks, 3rd ed., 2000, p. 244.

40tan x 53.13

30cos 51.13 100 ft 60 ft

60 ft 35 ft 25 ft

x

THE CORRECT ANSWER IS: (B)


CIVIL AM SOLUTIONS

72

12 in. 2%

2 Q1 = Q2

Q2

12 in. 2%

? in. 2%Q1

Q1

121.

Reference: Viessman and Lewis, Introduction to Hydrology, 4th ed., 1996, p. 252.

1 1 2 2

2/3 1/ 2 2/3 1/21 1 2 2

2/3 2/31 2

1 21 2

222

1

1

2/3 22

2 V A V A

1.49 1.492 A R S A R S

n n

A A2 A A

P P

1DA 0.785 ft

4 4P D 1 3.14 ft

DD0.785

2 0.7853.14 4

2/322

2

2/322 2

2/322 2

2/38/3

2

8/32

3/8

2

2

4D

D D0.623

4 4

D D

4 4

1 1D

4 4

0.623 0.311 D

0.623D

0.311

12 in.D 1.297 ft 15.6 in. 16 in.

ft

THE CORRECT ANSWER IS: (A)


CIVIL AM SOLUTIONS

79

135. Reference: Garber and Hoel, Traffic & Highway Engineering, 4th ed., p. 901.

s w

s w a

s

w

s

w

a

33

W WWTotal density

V V V V

where total density

W total weight

V total volume

W weight soil

W weight of water

V volume of soil

V volume of water

V volume of air

9.11 lb 4.41 lb156.67 lb/ft (pcf )

0.03 ft

Dry unit weig

d

d

ht of soil1 w

where w moisture content

156.67 pcf140.51 pcf

1 0.115



73

WATER RESOURCES AND ENVIRONMENTAL PM SOLUTIONS



75

501. Reference: Davis and Cornwell, Introduction to Environmental Engineering, 4th ed., 2008, p. 376. Convert wastewater flow rate to cfs:

6 310 10 gal day hr ft15.47 cfs

day 24 hr 3,600 sec 7.48 gal

Let x = BOD5 of the effluent after the BOD5 removal process. Then, from a mass balance at the mixing point:

5

(15.47) (100)(2) (115.47)(5)

24.39 mg/L

100 24.39BOD removal efficiency required (100) 75.6%

100

x

x


502. Reference: Metcalf and Eddy, Wastewater Engineering: Treatment and Reuse, 4th ed., 2003,

p. 409.

2

2

2 MGDFlow per clarifier 0.667 MGD

3 clarifiers

667,000 gpd 667,000Overflow rate 944 gpd/ft

706.930

4




76

503. Reference: Metcalf and Eddy, Wastewater Engineering: Treatment and Reuse, 4th ed., 2003, pp. 1,533–1,546.

2 2

3

Digester volume D H 0.785 (60 ft) (8 ft)4

22,608 ft

Daily sludge volume 20,000 gal/day 0.02 MGD

Sludge solids concentration 2% 20,000 mg/L

Daily VSS mass 8.34 QC

lb/Mgal8.34 (0.02 MGD)(0.75)(20,000 mg/L)

mg/L

2,502 lb/day

3

3

VSS

daily VSS mass 2,502 lb/dayVSS loading

digester volume 22,608 ft

0.111 lb/(ft -day)


504. Reference: Mott, Applied Fluid Mechanics, 6th ed., 2005, p. 464.

5/2

5/2

3

Q 2.48 H

13 in.(2.48)

12 in./ft

3.03 ft /sec

THE CORRECT ANSWER IS: (C)


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4b431 1504 Civ Sqs Water Resources 74 2

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