CDT Construction Specifications Institute Exam Lab Questions

In CSI-based drawing conventions, a scaled view is one drawn at a stated scale so that actual dimensions can be measured directly from the drawing (e.g., 1:100, 1/4" = 1'-0"). CSI’s Uniform Drawing System (UDS) treats floor plans, roof plans, and foundation plans as primary orthographic views prepared at a defined scale for dimensioning and coordination between disciplines. These are the standard “working drawings” for construction.

Foundation plan (Option B)A foundation plan is an orthographic plan view drawn to a specific scale showing footings, slabs, and foundations with dimensions and notes. It is intended for measurement and layout, and CSI references it as one of the basic scaled plan views of the project drawings.

Why the other options are not correct:

A. Perspective – Perspectives are pictorial views used for visualization and presentation. CSI notes that such views are typically not used for taking dimensions and may not be drawn to a true working scale.

C. Riser diagram – Riser diagrams (for plumbing, fire protection, electrical, etc.) are diagrammatic, showing relationships and routing, not physical locations at scale. They are expressly identified as “not to scale” in most construction document standards.

D. Isometric – Isometric drawings are a type of pictorial/axonometric view used to show three-dimensional relationships. While they can sometimes be constructed proportionally, CSI’s guidance treats them as diagrammatic/pictorial views rather than the primary scaled working views used for dimensioning work in the field.

CSI References (no links):

CSI Uniform Drawing System (UDS) modules on drawing types and views (plan, elevation, section, diagrammatic views).

CSI Project Delivery Practice Guide – discussion of scaled plan views as part of the construction documents set.

Comprehensive and Detailed Explanation From Exact Extract (CSI-aligned, paraphrased)

CSI emphasizes fairness, clarity, and equal information for all bidders. When controlled substitutions are permitted during bidding, the procedure typically described in Division 01 and the Instructions to Bidders is:

A bidder or manufacturer may propose a substitution for a specified product within a defined time before bid date.

The architect/engineer reviews the proposed substitution and may accept or reject it.

If the substitution is accepted, it must be communicated to all prospective bidders in a formal way so that every bidder is pricing the same requirements.

The correct formal mechanism during the bid period for changing procurement documents is an addendum. Therefore:

A substitution may be approved during bidding only if its approval is issued by an addendum to all bidders.

This maintains a level playing field and prevents one bidder from having a private advantage or a different scope basis than others.

Why the other options are not sufficient or correct alone:

B. The proposer of the substitution is notified in writingNotifying only the proposer does not put all bidders on the same basis. CSI stresses that changes affecting price, scope, or products must be distributed to all bidders via addenda during the procurement phase.

C. The architect/engineer accepts the substitution during the pre-bid meetingEven if verbally accepted in a pre-bid meeting, it must be officially documented by an addendum. Pre-bid meeting minutes alone are not a proper modification of the procurement documents unless they are explicitly issued as part of an addendum.

D. Specifications are revised and reissued to include the substitutionCompletely revising and reissuing specifications is not the usual or efficient method during a normal bid period. Instead, CSI practice is to use addenda to modify the existing specifications. On larger changes, an addendum may include revised pages, but the key formal instrument remains the addendum.

Therefore, in CSI-aligned bidding procedures, a substitution can be approved during bidding only when it is issued to all bidders as an addendum, making Option A the correct answer.

Key CSI-Related References (titles only, no links):

CSI Project Delivery Practice Guide – procurement process, bidder communications, and substitutions.

CSI Construction Specifications Practice Guide – Division 01 sections on Substitution Procedures and Instructions to Bidders regarding substitutions.

CSI CDT Study Materials – controlled substitutions during bidding and the role of addenda.

CSI’s Construction Specifications Practice Guide and CDT materials provide clear guidance on appropriate wording in specifications. They stress:

Use clear, specific, and enforceable language.

Avoid vague, subjective, or nontechnical terms that create ambiguity and open interpretation.

Among the answer choices, “Work” is the only word that is appropriate and standard in CSI-compliant specification text:

“Work” is a defined term in the General Conditions (and often Division 01), usually meaning the total construction and services required by the Contract Documents, including all labor, materials, equipment, and services necessary to complete the project.

Because it is defined and used consistently, “Work” is an acceptable and precise term for specification language. Example usage (conceptually): “Perform all Work in accordance with…”.

Why the other terms are inappropriate per CSI guidance:

A. AnyCSI recommends avoiding “any,” “either,” “etc.” and similar words because they are non-specific and create ambiguity. For example, “provide any fasteners as needed” does not clearly define what is required and can lead to disputes and inconsistent interpretation.

B. As perThe phrase “as per” is discouraged in CSI-style writing. It is considered informal and can be replaced by clearer, more direct phrasing such as “in accordance with,” “according to,” or “as indicated in.” CSI advocates for concise, plain, and unambiguous English in specs.

C. As requiredCSI strongly cautions against phrases like “as required” or “as necessary” when they are not tied to a clear condition or reference. They shift the decision to someone’s judgment later, instead of stating the requirement explicitly. If something is required, the specification should state what, when, and under what conditions, rather than simply saying “as required.”

Therefore, in a CSI-compliant specification, the term that is clearly appropriate from the options given is “Work” (Option D).

Relevant CSI references (no URLs):

CSI Construction Specifications Practice Guide – Chapters on language and writing style for specifications (clear, concise, complete, correct).

CSI Practice Guide for Principles & Formats of Specifications – Guidance on defined terms such as “Work.”

CSI CDT Body of Knowledge – Sections on specification-writing best practices and prohibited vague phrases.

CSI’s treatment of methods of payment / contract pricing (as used in standard owner–contractor agreements and CDT content) includes several common bases of payment:

Stipulated Sum (Lump Sum)

The contractor agrees to provide the work for a single fixed price.

The price does not change except through formal changes to the work (change orders).

This is the classic “fixed-price” contract form.

Unit Price

The contractor is paid based on measured quantities of work completed multiplied by agreed unit rates.

Final cost depends on actual quantities installed, not a single fixed total.

Cost-Plus-Fee

The owner reimburses actual cost of the work (labor, materials, equipment, etc.) plus a fee (fixed or percentage) as contractor’s compensation.

The final cost is not fixed; it varies with actual costs incurred.

Cost-Plus-Fee with Guaranteed Maximum Price (GMP)

A variation of cost-plus where the total reimbursable cost plus fee is capped at a guaranteed maximum.

Still not the same as a straightforward fixed lump sum; the basis is cost reimbursement up to a cap.

The question specifically asks: “for a fixed price.” In CSI and standard contract terminology, “fixed price” = “stipulated sum” (or lump sum). That is:

The owner and contractor negotiate a single dollar amount for the entire scope of work;

The contractor’s compensation is that stipulated sum, adjusted only by approved changes.

Why the other options are not correct:

B. Unit price – The total cost is not fixed at the time of contracting; it depends on actual installed quantities.

C. Cost-plus-fee – Costs are reimbursed; final price is open-ended and therefore not fixed.

D. Cost-plus-fee with guaranteed maximum price – This sets a cap, but the actual final cost is not a single fixed price; it is “actual cost plus fee” up to the GMP.

Therefore, the correct basis of payment for a fixed-price contract is Stipulated sum (Option A), consistent with CSI’s classification of contract types and standard owner–contractor agreements.

Key CSI References (titles only, no links):

CSI Project Delivery Practice Guide – sections on “Basis of Payment” and contract pricing methods (stipulated sum, unit price, cost-plus, GMP).

CSI CDT Body of Knowledge – Contract Types and Methods of Payment.

Standard owner–contractor agreements discussed in CSI materials (e.g., stipulated sum as the fixed-price form).