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CNC machinist test for hiring

See how candidates reason through CNC work in inch units before you interview.

10 minuten
15 vragen
Intermediate
Multiple choice
Questions in Engels
Phone and desktop

Use this test free See the question formats

Het korte antwoord

The CNC machinist test is a timed, job-focused assessment for CNC machinists, CNC operators moving into setup or programming, manufacturing and production technicians, and general machinists who work with inch drawings. It measures G-code, machine setup and operation, and machining process planning through multiple-choice questions based on short program listings, setup sheets, offset tables, and part callouts.

Wat het meet

Reading and writing G-code in inch units, setting up and running CNC machines, and planning the order of machining operations.

CNC programming

Candidates read and write G-code in inch units using short program listings.

Machine setup and operation

Candidates work with setup sheets, offset tables, and choices about running or setting up CNC machines.

Process planning

Candidates choose an appropriate order for machining operations based on part callouts and job details.

Question formats

Multiple choice

The candidate: Reads a short situation, table or statement and picks the right answer, or every right answer.

You see: Whether the candidate knows the material well enough to apply it, not just recognize it.

15 questions in 10 minutes, served one at a time.

Roles this test fits

CNC machinists, CNC operators moving into setup or programming, manufacturing and production technicians, and general machinists who work with inch drawings.

Useful evidence for CNC hiring

Look beyond job titles
See how candidates handle inch-unit G-code, setup information, and machining decisions, rather than relying on resume descriptions alone.
Focus interviews on the work
Separate scores for CNC programming, machine setup and operation, and process planning show which area to probe with machinists and operators moving into setup.
Test with shop documents
Questions use program listings, setup sheets, offset tables, and part callouts, so the score reflects decisions a machinist makes on the job.
Keep the first check brief
The assessment takes 10 minutes and has 15 questions. An on-screen calculator is available for speeds, feeds, and tolerances.

What you get for each candidate

Example report (fictional data)CNC Machinist (Imperial Measurements)

72%Percentile 48. Benchmark: HireValid candidates, n = 930

CNC programming80%

Machine setup and operation75%

Process planning62%

Integrity ScoreHoge betrouwbaarheid

Stayed on the test tab throughout
No pasted answers
Answered at a steady pace

Scores, profiles and integrity signals are evidence for you to review alongside an interview, never an automatic decision.

Use this test free

Test controls and integrity signals

Each candidate gets a different set of questions from large question pools. Question order and answer options are shuffled, and the browser receives one question at a time. Timing runs on the server. Reloading brings back the same question with only the time left. The test takes 10 minutes, and candidates cannot go back to earlier questions. Question text cannot be copied or selected; blocked copy attempts are recorded in the timeline. HireValid records signals such as time away from the test tab, pastes into answers, and answers faster than a question can be read. The employer reviews them in an Integrity Score and evidence timeline, which never decide on their own. With candidate consent, webcam photos can be added at random moments.

Hoe we fraude met AI tegengaan · Integrity signals

Use the score as evidence

Review the score alongside a work sample and a structured interview. Ask candidates to explain how they would approach an inch-unit setup or sequence machining operations, then compare that reasoning with their sub-skill scores. The score is one signal for your review, not a hiring decision. For adjacent skills, see Geometric Dimensioning & Tolerancing (GD&T), Mechanical Reasoning, and HVAC (Heating, Ventilation, and Air Conditioning).

Vragen voor gestructureerde sollicitatiegesprekken

Tell me how you would decide the order of operations for a part shown on an inch drawing.
Listen for a clear sequence and how the candidate uses the part callouts to guide the plan.
Describe how you would check a setup sheet and offset table before running a CNC job.
Listen for a deliberate review of setup information and how the candidate would resolve uncertainty before operation.
Walk me through how you would respond if a program listing did not match the part callouts.
Listen for careful comparison of the information and a reasoned next step, rather than an unsupported guess.

Understand scoring and benchmarks

Fairness and accommodations

Questions use the inch units, G and M codes and shop terms the job itself requires, written in plain US English without idioms or local references. Any chart a question depends on, such as tap drill sizes or surface speeds, is shown in the question, so nothing rests on memorizing one shop's tables. Code is written in the common ISO style most controls share, avoiding features that work differently from one control maker to another. Names in setup notes come from many backgrounds, and every candidate may use the on-screen calculator and scratch paper.

You can give any candidate extra time as an accommodation. Results are evidence for a person to review, never an automatic decision.

Provisional: reliability is reported once 200 candidates have completed it.

Lees hoe we met eerlijkheid omgaan

Test details

A timed, job-focused check for people who run and program CNC mills and lathes in inch units. Candidates read short program listings, setup sheets, offset tables and part callouts, and choose what a skilled machinist would write, set or do next. Each question has its own short timer, and an on-screen calculator is available for speeds, feeds and tolerances.

Questions are in English.
Aids allowed: A calculator, Scratch paper.
Each question is answered once, in order, with no going back.
4 practice questions, 4 minutes, before the timed test.

Veelgestelde vragen

What does the CNC machinist test measure?+

It measures reading and writing G-code in inch units, setting up and running CNC machines, and planning the order of machining operations. Candidates respond to short program listings, setup sheets, offset tables, and part callouts.

How long is the CNC machinist test, and what can candidates use?+

The test has 15 multiple-choice questions and takes 10 minutes. Each question has its own short timer, and an on-screen calculator is available for speeds, feeds, and tolerances. Candidates may also use scratch paper.

Is there a practice set for the CNC machinist test?+

Yes. The practice set has 4 questions and takes 4 minutes. It can introduce candidates to the assessment experience before they work through questions on inch-unit G-code, machine setup, and operation planning.

How are CNC machinist test questions written?+

Questions use inch units, G and M codes, and shop terms in plain US English. Any chart needed, such as tap drill sizes or surface speeds, appears in the question. Code uses common ISO style and avoids features that vary by control maker.