Project Management, CPM and PERT, and Engineering Ethics — Practice

Question 1

What is the critical path and what is the total float on it?

Accepted Answer

The longest path through the network, with zero total float.

Question 2

Find the expected time and standard deviation for a = 2, m = 5, b = 8.

Accepted Answer

te = (2 + 20 + 8)/6 = 5 and sigma = (8 - 2)/6 = 1.

Question 3

A (3 days) precedes B (4) and C (2). D (5) follows both B and C. Find the project duration and the float on C.

Accepted Answer

A-B-D = 12 days and A-C-D = 10 days. The duration is 12 days and C has a total float of 2 days.

Question 4

A project has PV = 100, EV = 80 and AC = 100. Find SPI and CPI and interpret.

Accepted Answer

SPI = 80/100 = 0.8 and CPI = 80/100 = 0.8, so it is behind schedule and over budget.

Question 5

An activity has normal time 10 days costing 5000 and crash time 8 days costing 6200. Find the cost slope.

Accepted Answer

(6200 - 5000)/(10 - 8) = 600 per day.

Question 6

A critical path has mean duration 40 days and variance 16. What is the approximate probability of finishing in 44 days or less?

Accepted Answer

Sigma = 4, so Z = (44 - 40)/4 = 1. The probability is about 84 percent.

Question 7

An engineer finds a design defect that threatens public safety, but the employer wants delivery on time. What should be done?

Accepted Answer

Raise the concern in writing with data, request correction, escalate to higher management and the regulator if ignored, and refuse to certify the defective work. Public safety overrides schedule and confidentiality.

Question 8

Which method suits repetitive construction work and why?

Accepted Answer

CPM, because it uses one deterministic time per activity and relates time to cost.

Practice — Project Management, CPM and PERT, and Engineering Ethics

Sign in to save attempts to your dashboard and track your accuracy over time

Find a verified tutor

Join a live course

Browse coaching centres

About

Categories

Support

Documentation

Get Study Tips & Updates

Download Our App

Download for iOS

Download for Android

Popular Cities