Question 81. . Consider the following statements regarding the critical path in the project network. Activity durations are given along side each arrow.1. Critical path is 1-2-4-7 2. Critical path is 1-3-4-7 3. Critical path is 1.3-6-7 4. Critical path is 1-3-5-7 Of these statements:

Question 82. .  Consider the following statements regarding slack 1. The free slack never exceeds total slack 2. The jobs that have total slack need not necessarily have free slack 3. A job has free slack only if it has more total slack that one of its immediate successors. Of these statements :

Question 83. . Consider the following definitions regarding slacks of project activities 1. The difference between the late start and early start times of a job is called the total slack. 2. The critical path is one whose jobs have zero total slack 3. The amount of time by which a job can be delayed without affecting the early start time of any job is called the free slack 4. The difference between the total slack of an activity and the minimum total slack of all its immediate successors is called free slack. Of these definitions:

Question 84. . Pick up the correct statement regarding PERT from the following :

Question 85. .  In arrow diagram figure of Q. 19.119

Question 86. .  Referring the figure state which one of the following statements, is correct :

Question 87. . Pick up the correct statement regarding CPM from the following :

Question 88. .  Pick up the correct statement from the following :

Question 89. . A projeect has three independent critical paths A, B and C. To reduce the project length, we have to shorten

Question 90. .  Refer to the arrow diagram and state which of the following statements is true regarding the immediate predecessor(s) of activity j