AutoCAD Quiz: Baseline And Continue Dimensions
10 questions · exam conditions
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Baseline And Continue DimensionsQuestion 1 of 10

A seed linear dimension spans from a left feature at x=0x=0 to a right feature at x=100x=100. During creation, however, the drafter selected x=100x=100 as the first extension-line origin and x=0x=0 as the second. The next feature to dimension is at x=150x=150.

What is the most reliable workflow for creating a continued dimension from x=100x=100 to x=150x=150?

Recreate the seed by selecting x=0x=0 first and x=100x=100 second, then run DIMCONTINUE.
Keep the seed unchanged, select it near x=100x=100, and then run DIMCONTINUE to x=150x=150.
Keep the seed unchanged, run DIMBASELINE, and supply x=150x=150 as the next origin.
Recreate the seed by selecting x=100x=100 first and x=150x=150 second, then run DIMCONTINUE.
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AutoCAD Quiz

AutoCAD Quiz: Baseline And Continue Dimensions

Practice Baseline And Continue Dimensions in AutoCAD with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Baseline And Continue Dimensions, giving you a quick way to practice the rules, question types, and explanations that matter most for AutoCAD.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

A seed linear dimension spans from a left feature at x=0x=0 to a right feature at x=100x=100. During creation, however, the drafter selected x=100x=100 as the first extension-line origin and x=0x=0 as the second. The next feature to dimension is at x=150x=150.

What is the most reliable workflow for creating a continued dimension from x=100x=100 to x=150x=150?

  1. Recreate the seed by selecting x=0x=0 first and x=100x=100 second, then run DIMCONTINUE. (correct answer)
  2. Keep the seed unchanged, select it near x=100x=100, and then run DIMCONTINUE to x=150x=150.
  3. Keep the seed unchanged, run DIMBASELINE, and supply x=150x=150 as the next origin.
  4. Recreate the seed by selecting x=100x=100 first and x=150x=150 second, then run DIMCONTINUE.
Explanation: Whenever you work with DIMCONTINUE or DIMBASELINE in AutoCAD, the critical concept to understand is which end of the seed dimension the command chains from. AutoCAD always continues from the second extension-line origin of the seed — the one picked last during creation. This means the pick order during seed creation directly controls where the chain begins. In this scenario, the drafter picked x=100x=100 first and x=0x=0 second. That makes x=0x=0 the second origin, so DIMCONTINUE would chain outward from x=0x=0 — the wrong end entirely — producing a dimension that moves away from x=150x=150 rather than toward it. Answer A corrects this at the root: by recreating the seed with x=0x=0 picked first and x=100x=100 picked second, the second origin is now x=100x=100, and DIMCONTINUE will correctly extend to x=150x=150. That's why A is the most reliable workflow. Choice B keeps the flawed seed and tries to salvage it by selecting near x=100x=100, but DIMCONTINUE ignores your selection point for chaining direction — it always uses the second origin regardless of where you click on the dimension object. Choice C switches to DIMBASELINE, which chains from the first origin (x=100x=100 as currently defined), and would create a baseline dimension back toward x=0x=0, not a continuation to x=150x=150. Choice D recreates the seed spanning x=100x=100 to x=150x=150, which is the finished dimension itself — not a seed to chain from. A useful rule of thumb: pick the "anchor" end first and the "chain" end second when creating any seed dimension you plan to continue. This one habit prevents the most common DIMCONTINUE errors on the exam and in practice.

Question 2

A drafter creates seed dimension D1 on a mechanical detail. The drafter then creates an unrelated linear dimension D2 elsewhere in the drawing. Without ending the session, the drafter starts DIMCONTINUE intending to extend D1.

Which action prevents the continuation from being based on the wrong dimension?

  1. Use the Select option in DIMCONTINUE and explicitly choose D1 as the base dimension for continuation. (correct answer)
  2. Accept the command default, because DIMCONTINUE locates and uses the geometrically nearest existing dimension.
  3. Click D1 before starting DIMCONTINUE, because preselecting an object always establishes it as the continuation base.
  4. Run DIMBASELINE on D2 first, because doing so resets the command history and restores D1 as the active base.
Explanation: When working with DIMCONTINUE and DIMBASELINE in AutoCAD, you need to understand how the command determines its "base" — the dimension it chains off of. By default, DIMCONTINUE uses the most recently created or edited dimension in the session as its starting point. Since D2 was created after D1, AutoCAD will default to continuing from D2, not D1 — which is exactly the wrong behavior here. The reliable fix is answer A: using the Select option within DIMCONTINUE. This built-in option lets you explicitly click the dimension you want to continue from, overriding the session history entirely. After selecting D1, the command anchors its chain to D1's second extension line, giving you precise control regardless of what was created most recently. Answer B is a trap — DIMCONTINUE does not search for the geometrically nearest dimension. It follows command history (most recent), so "accepting the default" here would chain off D2 by mistake. Answer C is similarly flawed: preselecting an object before entering DIMCONTINUE does not establish a continuation base in AutoCAD. The command ignores pre-selection for this purpose, so clicking D1 beforehand accomplishes nothing useful. Answer D is pure fiction — DIMBASELINE is an independent command that creates its own baseline chains; running it does not "reset command history" or restore any previous dimension as active. No such mechanism exists in AutoCAD. Study tip: Whenever a question involves DIMCONTINUE or DIMBASELINE on a specific target dimension, look for the Select option as the answer. AutoCAD exam questions frequently test whether you know that explicit selection — not proximity, pre-selection, or history — is the only guaranteed way to target the correct base dimension.

Question 3

The selected seed dimension uses style LEGACY. The current dimension style is PROJECT, DIMCONTINUEMODE is set to 11, and DIMLAYER is set to ANNO-DIMS. The current object layer is DETAIL. A new continued dimension is created from the seed.

Which style and layer will the new continued dimension use?

  1. Style LEGACY on layer DETAIL, because DIMCONTINUEMODE inherits the seed style and the current object layer is used when DIMLAYER is inactive.
  2. Style PROJECT on layer ANNO-DIMS, because the current dimension style takes precedence and DIMLAYER overrides the current object layer.
  3. Style LEGACY on layer ANNO-DIMS, because DIMCONTINUEMODE inherits the seed style and DIMLAYER overrides the current object layer. (correct answer)
  4. Style PROJECT on layer DETAIL, because the current dimension style and current object layer both govern new dimension creation.
Explanation: When AutoCAD creates a continued dimension, two independent variables control the outcome: the dimension style and the layer. Understanding that these two settings come from completely separate sources is the key to unlocking this question. DIMCONTINUEMODE controls which style a continued dimension inherits. When set to 11, AutoCAD forces the new continued dimension to match the seed dimension's style — in this case, LEGACY — rather than the current active dimension style. This behavior exists so that a chain of continued dimensions stays visually consistent with the dimension you started from, regardless of what style happens to be current. The layer assignment is governed by DIMLAYER, which is an independent system variable. When DIMLAYER is set to any specific layer name (here, ANNO-DIMS), AutoCAD places all new dimensions on that layer, overriding the current object layer entirely. So even though your current object layer is DETAIL, DIMLAYER wins. Combining both rules gives you Style LEGACY on layer ANNO-DIMS — which is answer C. Answer A is partially correct about the style but wrong about the layer, mistakenly assuming DIMLAYER is inactive or irrelevant. Answer B gets the layer right but applies the wrong style logic — DIMCONTINUEMODE set to 11 specifically prevents the current style (PROJECT) from taking over. Answer D is wrong on both counts, confusing "current active settings" with what DIMCONTINUEMODE and DIMLAYER actually enforce. Your study tip: treat style and layer as two separate tracks when continued dimensions are involved — DIMCONTINUEMODE owns the style decision, DIMLAYER owns the layer decision. They don't interact.

Question 4

A drawing requires baseline dimensions from a datum at x=0x=0. The existing seed dimension spans the datum and a feature at x=80x=80, but it was created by selecting x=80x=80 first and x=0x=0 second.

What should the drafter do before generating additional baseline dimensions from the required datum?

  1. Recreate the seed by selecting x=80x=80 first and each new feature second, then use DIMBASELINE.
  2. Keep the seed and select its dimension line near x=0x=0 when starting DIMBASELINE.
  3. Keep the seed and use DIMCONTINUE, because its second origin is already at x=0x=0.
  4. Recreate the seed by selecting x=0x=0 first and x=80x=80 second, then use DIMBASELINE. (correct answer)
Explanation: Whenever you see a question about DIMBASELINE in AutoCAD, the key concept to keep in mind is which origin point becomes the baseline datum. AutoCAD's DIMBASELINE command always measures successive dimensions from the first extension line origin of the seed dimension — not the second. This means the order in which you picked the two points when creating the seed dimension determines everything. In this scenario, the drafter picked x=80x=80 first and x=0x=0 second. That makes x=80x=80 the baseline datum — the opposite of what's required. To fix this, the seed dimension must be recreated by selecting x=0x=0 first and x=80x=80 second. Then DIMBASELINE will correctly anchor all subsequent dimensions to x=0x=0. That's exactly what D prescribes, making it the correct answer. A is wrong because recreating the seed with x=80x=80 first still anchors the baseline to the wrong datum — the same problem as the original seed, just redrawn unnecessarily. B is a tempting trap. Selecting near x=0x=0 when launching DIMBASELINE does not switch which origin is the base; AutoCAD uses the first origin of the existing seed regardless of where you click to select it. C confuses DIMBASELINE with DIMCONTINUE. DIMCONTINUE chains dimensions end-to-end from the second origin, so it would actually start from x=0x=0 here — but that produces a chain, not a true baseline from a fixed datum. Study tip: Always remember the rule — DIMBASELINE anchors to origin 1, DIMCONTINUE continues from origin 2. When a baseline datum is required, double-check your pick order before creating the seed.

Question 5

A drafter has supplied the final extension-line origin in DIMCONTINUE. The command again displays the prompt to specify another extension-line origin, with Select shown as the default option.

Using Enter rather than Esc, how should the drafter end the command without creating or selecting another continuation base?

  1. Press Enter once; this immediately terminates DIMCONTINUE because Select with no input ends the command.
  2. Press Enter twice; the first accepts the Select option and the second ends the command with no selection made. (correct answer)
  3. Press Enter three times; the keystrokes accept Select, clear the base dimension, and then terminate DIMCONTINUE.
  4. Press Enter once and then Spacebar; the Spacebar keystroke removes the active continuation base before exiting.
Explanation: Whenever you see a question about ending a repeating AutoCAD command like DIMCONTINUE, think carefully about how many layers of prompts are active — because each Enter keystroke answers one prompt at a time, not the entire command at once. After you supply the final extension-line origin in DIMCONTINUE, AutoCAD returns to its looping prompt asking for another origin, with Select shown as the default. At this point, two nested prompt layers are running: the inner "Select" option prompt and the outer "specify extension-line origin" prompt. Pressing Enter the first time accepts the Select default, which shifts AutoCAD into dimension-selection mode. Pressing Enter a second time, with nothing selected, signals that you have no dimension to select — and this empty response is what finally terminates the command. That two-keystroke sequence is exactly what answer B describes, making it correct. Answer A is wrong because a single Enter only accepts the Select option; it moves you into a new sub-prompt rather than exiting. Answer C adds a phantom third keystroke — there is no third prompt layer in DIMCONTINUE, so this reflects a misunderstanding of the command's prompt structure. Answer D mixes up the Spacebar (which AutoCAD treats as equivalent to Enter in most contexts, not as a special "clear base" key) — there is no dedicated base-clearing keystroke before exit. A useful rule of thumb: when AutoCAD shows a default option in brackets, one Enter accepts it but does not quit — you still need to satisfy any follow-up prompt that opens. Count your prompts, then count your Enters.

Question 6

DIMASSOC is set to 22. Using object snaps, a drafter creates a seed dimension from a datum object at x=0x=0 to a feature object at x=30x=30, then creates a baseline dimension to another feature object at x=60x=60. Later, the datum object moves to x=10x=10 while both feature objects remain fixed.

Assuming the associations remain intact, what values should the two dimensions display after the move?

  1. The seed displays 4040 and the baseline dimension displays 7070.
  2. The seed displays 3030 and the baseline dimension displays 6060.
  3. The seed displays 2020 and the baseline dimension displays 6060.
  4. The seed displays 2020 and the baseline dimension displays 5050. (correct answer)
Explanation: When working with associative dimensions (DIMASSOC = 2), each dimension endpoint is linked to a specific point on a specific object. This means when an object moves, any dimension attached to it updates automatically — but only the endpoints tied to that object shift. Here's how to think through this scenario. The seed dimension spans from the datum object (originally at x=0x=0) to the first feature (x=30x=30), measuring 3030. The baseline dimension measures from that same datum origin out to the second feature (x=60x=60), displaying 6060. When baseline dimensioning is used, both dimensions share the same first extension line — anchored to the datum object. When the datum moves to x=10x=10, both dimensions have their "zero end" pulled to x=10x=10, while both feature objects stay fixed. The seed dimension now spans x=10x=10 to x=30x=30, giving 60−10=2060 - 10 = 20. The baseline dimension now spans x=10x=10 to x=60x=60, giving 60−10=5060 - 10 = 50. That confirms D is correct. Choice A (4040 and 7070) incorrectly adds the datum's movement to both values rather than recalculating from the new anchor. Choice B (3030 and 6060) assumes no update occurred — as if DIMASSOC were set to 0 (non-associative). Choice C (2020 and 6060) correctly updates the seed but mistakenly treats the baseline as unaffected by the datum shift, forgetting that the baseline shares the same anchored origin. A reliable study tip: always trace which object each extension line snaps to. If the datum moves and both dimensions are anchored to it, both measurements shrink or grow by the same delta.

Question 7

A part has feature locations at x=0x=0, x=30x=30, x=55x=55, and x=90x=90 millimeters. An existing linear dimension was created from x=0x=0 to x=30x=30. The designer then supplies x=55x=55 and x=90x=90 as successive extension-line origins.

Which new dimension values are created by DIMBASELINE, compared with those created by DIMCONTINUE?

  1. DIMBASELINE creates 5555 and 9090; DIMCONTINUE creates 2525 and 3535. (correct answer)
  2. DIMBASELINE creates 2525 and 3535; DIMCONTINUE creates 5555 and 9090.
  3. DIMBASELINE creates 3030 and 6060; DIMCONTINUE creates 5555 and 9090.
  4. DIMBASELINE creates 5555 and 3535; DIMCONTINUE creates 2525 and 9090.
Explanation: Whenever you see a question involving DIMBASELINE and DIMCONTINUE, ask yourself one key question: where does each command measure from? That distinction is everything. Both commands build on an existing dimension — here, the baseline dimension from x=0x=0 to x=30x=30. DIMBASELINE always measures from the original first extension line (x=0x=0), so when you supply x=55x=55 and x=90x=90, it produces dimensions of 55−0=5555-0=55 and 90−0=9090-0=90. This creates a stacked, or "baseline," dimensioning scheme. DIMCONTINUE, by contrast, chains each new dimension from the previous endpoint. The first new segment runs from x=30x=30 to x=55x=55, giving 2525; the second runs from x=55x=55 to x=90x=90, giving 3535. This is correct answer A. Choice B swaps the two commands entirely — it assigns DIMBASELINE the incremental values and DIMCONTINUE the cumulative values, which is exactly backwards. Choice C invents values (3030 and 6060) that don't correspond to either command's logic; those numbers suggest someone mistakenly doubled or shifted the inputs rather than applying a clear measurement rule. Choice D mixes one value from each correct set (5555 from DIMBASELINE, 3535 from DIMCONTINUE), which reflects a partial understanding that still confuses the two commands. A reliable memory trick: DIMBASELINE = Base stays fixed (always back to zero), while DIMCONTINUE = Chain continues (each segment picks up where the last left off). Keeping that contrast sharp will protect you on any dimensioning question.

Question 8

Four rays from one vertex are located at angular positions of 0∘0^\circ, 25∘25^\circ, 60∘60^\circ, and 95∘95^\circ. An angular seed dimension was created from the 0∘0^\circ ray to the 25∘25^\circ ray. The remaining rays are then selected in increasing angular order.

What new angular values result from DIMBASELINE, and what values would DIMCONTINUE produce instead?

  1. DIMBASELINE creates 60∘60^\circ and 95∘95^\circ; DIMCONTINUE creates 35∘35^\circ and 35∘35^\circ. (correct answer)
  2. DIMBASELINE creates 35∘35^\circ and 35∘35^\circ; DIMCONTINUE creates 60∘60^\circ and 95∘95^\circ.
  3. DIMBASELINE creates 25∘25^\circ and 70∘70^\circ; DIMCONTINUE creates 60∘60^\circ and 35∘35^\circ.
  4. DIMBASELINE creates 60∘60^\circ and 35∘35^\circ; DIMCONTINUE creates 35∘35^\circ and 95∘95^\circ.
Explanation: When working with angular dimensions in AutoCAD, the key distinction between DIMBASELINE and DIMCONTINUE comes down to where each command measures from. DIMBASELINE always measures from the original baseline (the first extension line of the seed dimension), while DIMCONTINUE measures from the most recently placed dimension's second extension line, chaining incrementally. Here, the seed dimension runs from 0°0° to 25°25°, producing a 25°25° value. When you then select the 60°60° and 95°95° rays in order:
  • DIMBASELINE measures each new ray back to the original 0°0° baseline, producing 60°−0°=60°60° - 0° = 60° and 95°−0°=95°95° - 0° = 95°.
  • DIMCONTINUE measures each ray from the previous ray: 60°−25°=35°60° - 25° = 35°, then 95°−60°=35°95° - 60° = 35°. Both incremental gaps happen to equal 35°35°.
This confirms answer A is correct. Answer B reverses the two commands — it assigns the baseline-style cumulative values to DIMCONTINUE and the incremental values to DIMBASELINE, which is exactly backwards. Answer C mixes up both the logic and the arithmetic, producing values like 70°70° and 25°25° that don't correspond to either method correctly. Answer D similarly scrambles the outputs, incorrectly pairing 60°60° with DIMBASELINE's second value and 95°95° with DIMCONTINUE. A reliable memory trick: BASELINE = Big picture (always back to the origin); CONTINUE = Chain link (each connects to the last). If you keep that distinction clear, these questions become straightforward arithmetic.

Question 9

A seed dimension line is located 12 mm12\ \text{mm} from the object. DIMDLI is set to 8 mm8\ \text{mm}. With no text-fit or manual-positioning adjustments, the drafter creates three dimensions in one DIMBASELINE operation.

How far from the object will the outermost newly created baseline dimension line be located?

  1. 20 mm20\ \text{mm}, because DIMDLI is applied once to the complete baseline set.
  2. 24 mm24\ \text{mm}, because the three new dimensions share the DIMDLI distance.
  3. 36 mm36\ \text{mm}, because each new baseline line adds one DIMDLI interval. (correct answer)
  4. 44 mm44\ \text{mm}, because four dimension lines require four DIMDLI intervals.
Explanation: Whenever you see a DIMBASELINE question, the key concept to lock in is this: each new dimension line spawns from the previous one, not from the original object. The variable DIMDLI (Dimension Line Increment) controls the fixed offset between consecutive baseline dimension lines — and it applies once per new line created. Here's how to trace the math. Your seed dimension line sits 12 mm12\ \text{mm} from the object. DIMDLI is 8 mm8\ \text{mm}. When you run one DIMBASELINE operation to create three new dimensions, AutoCAD places each successive line one DIMDLI increment beyond the last:
  • Line 1 (seed): 12 mm12\ \text{mm}
  • New line 1: 12+8=20 mm12 + 8 = 20\ \text{mm}
  • New line 2: 20+8=28 mm20 + 8 = 28\ \text{mm}
  • New line 3 (outermost): 28+8=36 mm28 + 8 = 36\ \text{mm}
That confirms C — the outermost line lands at 36 mm36\ \text{mm}. A is wrong because it treats DIMDLI as a single total offset applied to the whole group — DIMDLI stacks with every new line. B incorrectly implies the three new lines somehow share one DIMDLI interval, dividing or averaging it, which is not how AutoCAD behaves. D counts four DIMDLI intervals (12+4×8=44 mm12 + 4 \times 8 = 44\ \text{mm}), which would only be correct if the seed line itself were also shifted — but the seed is already placed and doesn't move. A good memory anchor: DIMDLI × number of new lines added = total additional distance. Count only the new lines, not the seed.

Question 10

During one DIMBASELINE operation, a drafter creates dimensions to features at 40 mm40\ \text{mm}, 70 mm70\ \text{mm}, and 100 mm100\ \text{mm} from the common datum, in that order. The 70 mm70\ \text{mm} feature should not be dimensioned, but the 100 mm100\ \text{mm} dimension must remain.

Which workflow corrects the set while preserving the active baseline operation?

  1. Use Undo once, then respecify the 70 mm70\ \text{mm} origin and finish the command.
  2. Use Undo twice, then respecify the 100 mm100\ \text{mm} origin and finish the command. (correct answer)
  3. Use Select once, choose the 70 mm70\ \text{mm} dimension, and press Enter to delete it.
  4. Use Undo three times, then respecify both 40 mm40\ \text{mm} and 100 mm100\ \text{mm} origins.
Explanation: When working inside an active DIMBASELINE command, AutoCAD gives you a live Undo option that steps backward through the dimensions created during that session — without exiting the command. Understanding this distinction is the key to answering workflow questions like this one. Here, three dimensions were placed in sequence: 40 mm40\ \text{mm}, then 70 mm70\ \text{mm}, then 100 mm100\ \text{mm}. The goal is to remove the 70 mm70\ \text{mm} dimension while keeping both the 40 mm40\ \text{mm} and 100 mm100\ \text{mm} dimensions. Because Undo within DIMBASELINE removes the most recently placed dimension and steps you back to the previous pick point, you need to undo the last two placements — first removing 100 mm100\ \text{mm}, then removing 70 mm70\ \text{mm} — leaving only 40 mm40\ \text{mm} active. From there, you respecify the 100 mm100\ \text{mm} origin and finish the command. That is exactly what B describes, making it correct. A is wrong because undoing only once removes just the 100 mm100\ \text{mm} dimension, leaving the unwanted 70 mm70\ \text{mm} dimension still in place. You cannot then "respecify the 70 mm70\ \text{mm} origin" to fix it — you'd be recreating the problem. C is wrong because there is no "Select" sub-option inside DIMBASELINE that deletes an existing dimension. That option is used to choose a different baseline, not to remove a placed dimension. D is wrong because undoing three times removes all three dimensions, including the 40 mm40\ \text{mm} one, forcing you to respecify it unnecessarily — extra work that the question specifically says to avoid. Remember: within DIMBASELINE, each Undo peels back exactly one dimension in reverse order. Count your steps before you undo.