10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The CMfgE exam has 173 questions and runs 4 hours.
These 10 free CMfgE questions are organized by exam domain, so you can see how each part of the Certified Manufacturing Engineer (CMfgE) blueprint is tested. Reveal the answer and explanation under each question.
A hole is dimensioned 0.500 to 0.520 in. diameter and carries a position tolerance of 0.010 in. diameter at maximum material condition. The hole is produced at 0.514 in. diameter. What total position tolerance is available for that feature?
Correct answer: D - 0.024 in.
To reduce cumulative trauma disorders on a high-repetition assembly line, a plant rotates operators through three different workstations every two hours. Under the hierarchy of controls, this countermeasure is:
Correct answer: A - An administrative control, ranking below workstation redesign
A 2.000 in. diameter carbon steel bar is to be turned at a cutting speed of 300 surface feet per minute. What spindle speed should be programmed?
Correct answer: B - 573 rpm
A round blank 2.50 in. in diameter is to be produced from sheet steel 0.075 in. thick having a shear strength of 45,000 psi. What blanking force is required?
Correct answer: B - 26,500 lb
A filler metal with a liquidus of 610 degrees C (1,130 degrees F) is drawn into a closely fitted joint by capillary action, and the base metals are not melted. This process is:
Correct answer: A - Brazing
A fixture designer supports a machined casting on its primary datum surface using eight locating pins rather than three. The MOST likely consequence is:
Correct answer: D - Inconsistent seating and part distortion caused by over-constraint
A company develops a proprietary heat-treatment cycle that gives its gears superior fatigue life. The cycle cannot be determined by examining or testing a finished gear. Which protection strategy is MOST appropriate?
Correct answer: C - Maintain it as a trade secret with controlled access and NDAs
A manufacturer is setting security priorities for its plant floor control network. Compared with a typical enterprise IT network, which security attribute is normally elevated to the highest priority in an operational technology environment?
Correct answer: D - Availability
A machining center streams live spindle load and temperature data to a virtual model that updates in real time. The model cannot send any command or adjustment back to the machine. This arrangement is correctly described as a:
Correct answer: A - Digital shadow
An articulated robot returns to a taught point within 0.02 mm on every cycle. When the same robot is commanded to a coordinate generated by offline programming, the tool center point lands 1.4 mm from the intended location. This result MOST directly demonstrates that:
Correct answer: B - The robot's repeatability is far better than its absolute accuracy
The CMfgE exam also covers these domains. Drill them in the full free practice test:
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