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Construction Management
5th Edition
ISBN: 9781119256809
Author: Daniel W. Halpin, Bolivar A. Senior, Gunnar Lucko
Publisher: WILEY
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Chapter 5, Problem 3RQE
To determine
List the names of three types of partnerships.
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1- Present worth analysis
An Environmental engineer is considering two materials for use in a sustainable
building. All estimates are made below. (a) Which should be selected on the basis
of a present worth comparison at an interest rate of 12% per year? (b) At what
first cost for the material not selected above will it become the more economical
alternative?
يفكر مهندس بيئة في الاختيار بين مادتين لاستخدامهما في انشاء مبنى مستدام كافة البيانات
الاقتصادية الخاصة بالمادتين مذكورة في الجدول ادناه.
(أ) أي المادتين ستختار على أساس مقارنة القيمة الحالية ) present worth analysis) اذا كان
معدل الفائدة 12% سنويًا؟
(ب) كم يجب ان تصبح الكلفة الاولية رأس المال) للمادة غير المختارة أعلاه لتصبح البديل الافضل
اقتصاديا؟
Material A
First Cost
15000
Maintenance cost
9000
Salvage value
2000
Life
5
Material B
35000
7000
20000
5
2- IRR analysis
A manufacturer of hydraulic equipment is trying to determine whether it should
use monoflange double block and bleed (DBB) valves or a multi-valve system
(MVS) for…
Models of Traffic Flow (Section 5.4)
5.7 An observer has determined that the time
headways between successive vehicles on a section of
highway are exponentially distributed and that 65%
of the headways between vehicles are 9 seconds or
greater. If the observer decides to count traffic in 30-
second time intervals, estimate the probability of the
observer counting exactly four vehicles in an interval.
5.8 At a specified point on a highway vehicles are
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- On page 1, in the first body paragraph ("In the United States…to be smart."), edit the Kaya source so the Name of Web Page is "Fast Facts 2020: Demographics", the correct Name of the webpage.arrow_forward4.12 A 400 m vertical curve connects a -2.00% grade to a +4.00% grade. The P.I. is located at station 150 + 00 and elevation 60.00 m above sea level. A pipe is to be located at the low point on the vertical curve. The roadway at this point consists of two 3.6 m lanes with a normal crown slope of 2%. If the lowest point on the surface of the road- way must clear the pipe by 0.75 m, what is the station and maximum elevation of the pipe?arrow_forward=7.5 in., d1 = 1.5 in., b2 = 0.75 in., d2= 6.0 in., b3 = 3.0 in., and d3 = 2.0 in. Determine (a) the centroid location in inches from the bottom surface. Round off to two decimal places. M H b₂ y ... d₁ M by dy Xarrow_forward
- Vehicles arrive at a single park-entrance booth where a brochure is distributed. At 8 A.M., there are 20 vehicles in the queue and vehicles continue to arrive at the deterministic rate of λ(t) = 4.2 − 0.1t, where λ(t) is in vehicles per minute and t is in minutes after 8:00 A.M. From 8 A.M. until 8:10 A.M., vehicles are served at a constant deterministic rate of three per minute. Starting at 8:10 A.M., another brochure-distributing person is added and the brochure-service rate increases to six per minute (stillarrow_forwardVehicles arrive at a single park-entrance booth where a brochure is distributed. At 8 A.M., there are 20 vehicles in the queue and vehicles continue to arrive at the deterministic rate of λ(t) = 4.2 − 0.1t, where λ(t) is in vehicles per minute and t is in minutes after 8:00 A.M. From 8 A.M. until 8:10 A.M., vehicles are served at a constant deterministic rate of three per minute. Starting at 8:10 A.M., another brochure-distributing person is added and the brochure-service rate increases to six per minute (still at a single booth). Assuming D/D/1 queuing, determine the longest queue, the total delay from 8 A.M. until the queue dissipates; and the wait time of the 40th vehicle to arrive.arrow_forwardAt 8:00 A.M. there are 10 vehicles in a queue at a toll booth and vehicles are arriving at a rate of λ(t) = 6.9 − 0.2t. Beginning at 8 A.M., vehicles are being serviced at a rate of μ(t) = 2.1 + 0.3t [λ(t) and μ(t) are in vehicles per minute and t is in minutes after 8:00 A.M.]. Assuming D/D/1 queuing, what is the maximum queue length, and what would the total delay be from 8:00 A.M. until the queue clears?arrow_forward
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