24-Bld-A3 Construction Engineering · Undated paper
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Examinations — 07-Bld-A3, May 2019 — Construction Engineering. Closed book; candidates may use one of the two approved calculators (Casio or Sharp). The paper prints seven questions of equal value (20 marks each) and states that any five questions constitute a complete paper, only the first five appearing in the answer book being marked. Candidates are urged to record any interpretive assumptions with their answers. All seven questions are worked below, because the set is intended as a study resource rather than as a single exam sitting.
Reference texts: Hendrickson, C. & Au, T., Project Management for Construction (2nd ed., Carnegie Mellon) — precedence networks with SS/FS lags, cash-flow financing, contract types; Halpin, D.W. & Senior, B.A., Construction Management (4th ed., Wiley) — CPM/LOB scheduling, formwork & equipment production, bonding and cash flow; Canadian Construction Documents Committee, CCDC 2 — Stipulated Price Contract (2020) — contract clauses, addenda, change orders, holdback; Canadian Foundation Engineering Manual (CFEM) & WorkSafeBC Occupational Health and Safety Regulation, Part 20 — excavation support and shoring.
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
Approach. Each item is answered with the single best choice and a one-line reason grounded in standard construction contract law, project-controls, and CPM terminology.
| # | Question | Answer | Why |
|---|---|---|---|
| 1 | Drawback of cost-plus-fixed-percentage contracts | C. Contractor has no incentive to save money | The fee grows with cost, so lower cost means a smaller fee — the opposite of a savings incentive. |
| 2 | Fast-track vs. phased construction | C. Design overlaps construction in each phase | That overlap of design and construction is the defining feature of fast-tracking. |
| 3 | Key benefit of Turn-Key contracts | B. Quality satisfies owner requirements | A turnkey contractor is held to the owner's performance specification as a single point of responsibility, so meeting stated requirements is the core value proposition. |
| 4 | Which contract form has least flexibility for design changes? | A. Lump Sum | A fixed total price for a fixed scope makes any change require a formal, often costly, change order — the least flexible of the three. |
| 5 | Correct statement about the construction industry | B. Projects are getting more complex and more demanding | Standard, uncontroversial industry observation; the other options (high R&D, high productivity vs. manufacturing) are factually the reverse of the industry's reputation. |
| 6 | Measures that help owners reduce project execution risk | D. All of the above | Performance bonds, retention and careful contractor selection are all standard, complementary owner risk-management tools. |
| 7 | Why is a WBS needed? | B. To facilitate work packaging and cost estimating | Breaking scope into packages is the WBS's defining purpose; forward/backward pass and bar charts are downstream scheduling steps, not WBS functions. |
| 8 | TRUE statement about unit-price and lump-sum contracts | B. They are types of Competitive Bidding Contracts | Both are traditional, competitively tendered pricing methods, as distinct from negotiated cost-plus contracts. |
| 9 | Disadvantage of Turn-Key contracts | B. Requires too much owner involvement (upfront) | Because the owner cannot revise design intent once construction starts, all requirements must be defined precisely before award — a heavy front-end burden despite the light involvement during construction. |
| 10 | What is MERX? | C. A web depository of calls for bidders | MERX is Canada's principal public electronic tendering portal for government and broader public-sector solicitations. |
| 11 | An Addenda is needed to | A. Keep all bidders informed of all Q/As | Addenda are the formal mechanism for issuing clarifications and changes to every bidder equally during the tender period. |
| 12 | In Lane-Rental contracts | B. Contractor has strong incentive to finish the project fast | The contractor pays a daily rental for every day a traffic lane is occupied, directly rewarding faster completion. |
| 13 | Secondary site investigation is by whom, for what? | A. Designers, to get soil profile | A detailed (secondary) geotechnical investigation is commissioned by the design team to establish subsurface conditions for foundation design, beyond a preliminary desktop review. |
| 14 | Which contract clause is NOT permissible? | B. Penalty only without incentive | Courts distinguish liquidated damages (a genuine pre-estimate of loss, enforceable) from a pure penalty clause, which is punitive and generally unenforceable; a paired penalty-and-incentive clause is a recognized, balanced allocation of schedule risk. |
| 15 | Contractor prequalification documents include | D. All of the above | Financial standing, project history and equipment/management capacity are all standard prequalification criteria. |
| 16 | Critical activity is one that | A. Lies on the longest path in the network | The standard CPM definition (equivalently, zero total float) — negative float cannot occur in a normally scheduled network, and positive float is the definition of non-critical. |
| 17 | Bar-chart figure: shaded bar from day 1 to day 11 inside a longer dashed outline | B. Non-Critical Task with ES = 1 and EF = 11 | The solid/hatched segment is the task's actual ES→EF span (1→11, a 10-day duration); the dashed extension beyond it is float, which a truly critical task would not have. |
| 18 | Precedence diagram: A → B labelled "3" | A. The start of B is after the finish of A by 3 days | A plain arrow with a numeric lag on it denotes a Finish-to-Start relationship with a 3-day lag — exactly the FS = 3 notation used between C and G in Question 1. |
| 19 | What does HDD stand for? | B. Horizontal Directional Drilling | Standard trenchless construction method for installing underground utilities without open-cut excavation. |
| 20 | Select the TRUE statement | A. Delaying a non-critical activity decreases its total float | Total float = LS − ES by definition; using up any of it (by delaying the activity's start) directly reduces what remains. Speeding non-critical work does not shorten the project, and fast-track methods are not inherently cheaper. |
