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.
These 10 free FPAI questions are organized by exam domain, so you can see how each part of the Fluid Power Accredited Instructor blueprint is tested. Reveal the answer and explanation under each question.
A vertical hydraulic cylinder raises a loaded platen smoothly but chatters during lowering. A pilot-operated check valve holds the load. Each time pilot pressure opens the check, the platen accelerates, pilot pressure falls, and the check closes again. Which design change addresses this instability while retaining load control?
Correct answer: C - Replace the check with a pilot-assisted counterbalance valve to meter the lowering flow.
A cylinder must begin extending against an 18 kN resisting load. Cap-end pressure is limited to 100 bar, and rod-end backpressure is 25 bar. The full piston area is 20 cm²; the rod-side annular area is 12 cm². Both pressures are gauge pressures. Neglect seal friction. Will the available hydraulic force start the load?
Correct answer: B - No; the net extension force is 17 kN.
During extension of a double-acting pneumatic cylinder, the cap end receives supply air and the rod end exhausts. The extension speed needs adjustment, but inlet flow to the rod end during retraction must remain unmetered. Which installation provides meter-out control of extension?
Correct answer: B - A one-way flow control at the rod port, restricting outward flow and allowing free inward flow.
A PID position controller driving a proportional hydraulic valve reaches its output limit while a temporary load prevents the axis from reaching its target. After the load is removed, the axis passes the target, yet the controller continues commanding motion in the original direction before eventually recovering. Position feedback has been verified. This response most strongly indicates:
Correct answer: A - Integral windup following prolonged output saturation.
A commissioning specification requires an ISO 4406 cleanliness code no higher than 18/16/13. Two representative samples collected at operating temperature both report 17/15/14. The commissioning record should state:
Correct answer: C - Fail: the 14 µm(c)-and-larger particle channel exceeds its limit.
A fitter wiping oil from a pressurized hydraulic hose feels a sharp sting and finds a pinpoint puncture on a finger. There is little bleeding, and the initial pain subsides. The equipment has now been isolated. Which response is warranted now?
Correct answer: C - Arrange immediate emergency medical assessment for suspected high-pressure fluid injection.
During off-machine commissioning, a linear pressure transmitter is ranged 0-200 bar with a 4-20 mA output. At a verified zero-pressure input, both loop current and the controller's raw input read 4.0 mA, but the screen shows 40 bar. At a verified 100 bar input, both read 12.0 mA, but the screen shows 120 bar. Where should the correction be made?
Correct answer: D - Rescale the controller's pressure conversion so 4-20 mA represents 0-200 bar.
Rehearsal feedback shows that learners lose track of a force calculation for a single-rod cylinder when the instructor starts discussing return-line losses before finishing the force balance. Learners can do the arithmetic but cannot identify which pressure acts on each piston face. The scheduled teaching time is adequate. What should change in the instructor's delivery?
Correct answer: D - Identify each chamber pressure in turn and finish the force balance before introducing line losses.
An instructor wants learners to distinguish the effect of hydraulic flow from the effect of load. A guarded trainer has an adjustable-displacement pump and one cylinder. Measurements will be taken during steady motion, away from the end cushions, with the relief closed and the pump below its pressure-compensator setting. The clearest comparison is to:
Correct answer: C - Change pump flow, hold the load constant, and compare piston speed and chamber pressures.
At an IFPS Instructor Training Workshop, a candidate follows the submitted outline but ends the teaching presentation after 37 minutes. Audience questions then occupy eight minutes. How is this assessed under the current workshop requirements?
Correct answer: A - It is incomplete: the teaching presentation lasted less than 40 minutes.
The FPAI exam also covers these domains. Drill them in the full free practice test:
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