Test 11 - Network Analysis Fundamentals

Question 1 ప్రశ్న 1

A construction planner is preparing a network for a water-supply scheme containing intake works, a pump house and a transmission main. What is the PRIMARY information a project network is intended to represent?

A Only the physical locations of permanent structures on the site. B Activities and their logical precedence relationships so that the feasible order of work can be analysed. C Only the contract values of the individual structures. D Only the names of contractors without construction dependencies.

Question 2 ప్రశ్న 2

In an Activity-on-Arrow (AOA) network for a reservoir project, which statement correctly identifies the conventional representation of REAL activities and events?

A The nodes exclusively represent duration-bearing activities, and arrows carry only dependency information. B Every arrow represents a calendar date, while nodes represent contractors. C Activities are represented only by horizontal time-scaled bars. D Real activities are represented by directed arrows, while their tail and head nodes represent start and completion events.

Question 3 ప్రశ్న 3

Which representation is correct for an Activity-on-Node (AON) or precedence network?

A Activities are placed in nodes or boxes, and directed links indicate their logical relationships. B Activities must be represented by event-numbered arrows and their identities determined only by pairs of event numbers. C Every precedence relationship must be represented by a zero-duration dummy activity. D Horizontal bar lengths alone establish every predecessor relationship without links.

Question 4 ప్రశ్న 4

An AOA schedule distinguishes completion of a pump foundation from the seven-day curing operation preceding it. Which statement about EVENTS and ACTIVITIES is correct?

A Both the curing operation and its completion event necessarily consume seven days each. B A completion event requires a separate construction crew for its entire duration. C The curing operation has a duration, while an event marking its satisfactory completion is a zero-duration point. D All operations involving waiting must be assigned zero duration regardless of technical requirements.

Question 5 ప్రశ్న 5

An AON network has finish-to-start links A to B and B to C, with no other links. Which is the IMMEDIATE predecessor of C?

A Activity A only. B Activity B only. C Both A and B as separate immediate predecessors. D No activity, because C has an indirect predecessor.

Question 6 ప్రశ్న 6

In an AON network, Activity A has direct links to B and C; B directly precedes D, and C directly precedes E. What are the IMMEDIATE successors of A?

A B and C. B D and E only. C B, C, D and E as immediate successors. D A has no successors because two branches start from it.

Question 7 ప్రశ్న 7

After a pump-house foundation is accepted, electrical-room fitting and independent delivery inspections can proceed without a technical precedence relationship between them. What does their CONCURRENT relationship mean?

A They must always begin at precisely the same clock instant. B They must always finish at precisely the same instant. C They are required to follow one another in an arbitrary fixed order. D Their planned work periods may overlap, provided the required resources and other constraints permit it.

Question 8 ప్రశ్న 8

In an AOA network, event 8 has two real activities terminating at it and three real activities starting from it. How is event 8 best classified?

A Only a terminal event, because more than one arrow reaches it. B Only an initial event, because several arrows leave it. C Both a merge event for incoming activities and a burst event for outgoing activities. D A dummy activity, because it joins two branches.

Question 9 ప్రశ్న 9

In a correctly drawn Activity-on-Arrow network, two real activities originate from DISTINCT tail events. Both tail events are reached at project time zero through zero-duration dummy links from the project start. The real activities take 7 days and 10 days respectively and both enter the SAME merge event. With no other constraints, what is the earliest occurrence time of that merge event?

A 10 days. B 7 days. C 17 days. D 3 days.

Question 10 ప్రశ్న 10

In a network with finish-to-start relationships and no overlap, activities A, B and C form one complete START-to-FINISH path. Their durations are 3, 4 and 5 days respectively. What is the duration of this path?

A 7 days. B 12 days. C 5 days. D 15 days.

Question 11 ప్రశ్న 11

A small AON project has A = 4 days and B = 6 days starting at time zero. Activity C = 5 days follows A; D = 2 days follows B; E = 3 days follows BOTH C and D. All links are finish-to-start, with no resource constraints or lag. What is the earliest completion time?

A 9 days. B 11 days. C 15 days. D 12 days.

Question 12 ప్రశ్న 12

An AOA network has exactly four real arrows: A from event 1 to 2 (4 days), C from 2 to 4 (5 days), B from 1 to 3 (6 days), and D from 3 to 4 (3 days). Event 1 is the start and event 4 the finish. Which statement is correct under unrestricted parallel execution?

A Only the A-C path is critical, with a 9-day project duration. B Only the B-D path is critical, with a 9-day project duration. C Both A-C and B-D are critical paths, and the minimum completion time is 9 days. D The duration is 18 days because all four arrows must be added.

Question 13 ప్రశ్న 13

What is the defining role of a DUMMY activity in a traditional AOA network?

A To represent a real operation that requires an exceptionally small amount of labour. B To preserve required precedence logic with a zero-duration, zero-resource logical arrow. C To represent every activity with positive total float. D To add an arbitrary waiting time at the end of construction.

Question 14 ప్రశ్న 14

Two independent activities A and B start at the project start. Activity C must await BOTH A and B, whereas Activity D must await B ONLY. Which AOA representation principle prevents an incorrect extra dependency on A for D?

A Retain a B-completion event from which D can start, while using a suitable zero-time dummy to convey completion of B to the separate joint prerequisite event for C. B Merge A and B into a single event and start both C and D from it, regardless of their distinct prerequisites. C Draw D as starting before B to remove all dependence on preceding work. D Give A and B identical node pairs and assume the different logic is self-evident.

Question 15 ప్రశ్న 15

Two distinct real activities would otherwise be drawn as arrows with the SAME start-event number and SAME finish-event number in a classical AOA network where each activity is identified by its event pair. What is the main issue and remedy?

A The issue is that the two activities cannot execute concurrently, so one must be deleted. B The issue is excessive duration, so the shorter activity must become a milestone. C The event-pair identifiers would not distinguish the activities; introduce appropriate event separation and a dummy link while preserving the intended logic. D The issue is that AOA networks prohibit any parallel branches whatsoever.

Question 16 ప్రశ్న 16

A project has partial dependencies: activity C requires both A and B, but activity D requires only B. Why is AON often easier than AOA for representing this situation?

A AON requires both C and D to have identical predecessors. B AON eliminates the need to estimate activity durations. C AON represents activities only through numbered events with no links. D AON can directly connect A and B to C, and B alone to D, without traditional AOA dummy arrows.

Question 17 ప్రశ్న 17

In a conventional AOA network, a real activity is shown as a directed arrow from event 3 to event 8 and is labelled as requiring 4 days. Which statement is correct?

A The activity connects its tail event 3 to its head event 8 and carries a four-day duration; the event numbers are identifiers, not elapsed days. B The activity lasts 8 minus 3, or 5 days, regardless of its duration label. C Event 3 itself consumes four days and the arrow consumes zero time. D The direction of work must be from event 8 toward event 3 because 8 is the higher number.

Question 18 ప్రశ్న 18

Two AOA activity arrows are drawn with equal geometric length on paper. One has a labelled duration of 3 days and the other 11 days. Which interpretation is correct?

A Both activities must take 7 days because their arrows are the same length. B Their durations are 3 and 11 days respectively; geometric arrow length is not a time scale in a standard AOA network. C The shorter stated duration must be changed to match the longer duration. D The two arrows must be dummy activities because their lengths are equal.

Question 19 ప్రశ్న 19

A proposed precedence network for intake construction states that A must precede B, B must precede C, and C must precede A. What is the principal network-logic defect?

A There are too many terminal events. B The network contains two valid independent branches. C The relationships create a directed cycle, so no activity in that cycle can legitimately be first under the stated prerequisites. D The use of lettered activity identifiers is prohibited.

Question 20 ప్రశ్న 20

In an AON plan for a water-treatment plant, Activity G produces a commissioning document REQUIRED for project acceptance, but G has no logical route to the defined final-completion milestone. What is the most appropriate review finding?

A The document may be omitted because it has no successor link. B G must be converted automatically into a zero-day activity. C G should be removed from the scope, regardless of acceptance requirements. D The network contains a dangling required branch; connect G to the appropriate acceptance or completion logic without creating a false precedence.

Question 21 ప్రశ్న 21

Two activities have no technological dependency and appear on parallel AON branches. Both require the project's ONLY specialist crane for their entire durations, and crane sharing is impossible. What is the appropriate interpretation?

A The basic network proves they can actually run at the same time because they are parallel branches. B The precedence network permits overlap logically, but a resource-feasible schedule must sequence the crane use or provide an authorized extra crane. C One activity must be given zero duration so the network remains valid. D The two activities must be joined by a dummy in AON to indicate a physical crane.

Question 22 ప్రశ్న 22

Consider this AON topology with a single START and FINISH: START leads separately to A and B; BOTH A and B precede EACH of C and D; and BOTH C and D lead to FINISH. How many distinct START-to-FINISH activity paths exist, ignoring durations?

A 4 paths. B 2 paths. C 6 paths. D 8 paths.

Question 23 ప్రశ్న 23

An AOA network has A: 1 to 2, duration 4 days; B: 1 to 3, duration 6 days; a DUMMY: 2 to 3, duration zero; and C: 3 to 4, duration 5 days. Project time at event 1 is zero, all links are finish-to-start, and there are no resource restrictions. What is the earliest time at event 4?

A 9 days. B 15 days. C 10 days. D 11 days.

Question 24 ప్రశ్న 24

In an AON precedence diagram, Activity A starts at project time zero and lasts 7 days. Activity B has a START-to-START relationship with A with a minimum positive lag of 2 days and has no other predecessor or constraint. What is B's earliest permitted start time?

A Time 0 days, because start-to-start means simultaneous start in all cases. B Time 7 days, because the predecessor must finish first. C Time 2 days, because the lag is measured from A's start rather than its finish. D Time 9 days, because the activity duration and lag must be added.

Question 25 ప్రశ్న 25

In a conventional AOA network that uses increasing event numbers in the direction of work and one identified final event, which diagramming practice is correct?

A Direct real and dummy arrows from their predecessor events toward successor events, keep event identification unambiguous, and avoid cycles or required branches disconnected from the final event. B Number every arrow head lower than its tail to indicate progress toward completion. C Allow closed directed loops when they make the diagram visually compact. D Leave required commissioning activities disconnected from the finish because they are outside physical construction.

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