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 IPE questions are organized by exam domain, so you can see how each part of the Introduction to Process Engineering blueprint is tested. Reveal the answer and explanation under each question.
A failed hydraulic hose sends a fine jet into the back of a technician's hand. After the equipment is made safe, only a pin-sized puncture is visible and the technician reports little pain. What should the supervisor arrange?
Correct answer: A - Immediate emergency medical assessment for a possible fluid-injection injury
On a wafer, patterned resist protects the areas of a thin film that must remain. Openings in the resist expose the film that must be removed. The next operation must transfer that pattern into the film beneath the resist. Select the operation that performs this step.
Correct answer: D - Etching
A transfer chute's guide insert shows little abrasion after weeks of service, but it chips when a product strikes its edge. The replacement must retain the present wear resistance and geometry. Which additional property should receive priority?
Correct answer: C - Impact toughness
An evaporator contains pure water at a controlled pressure of 101.3 kPa absolute. Two checked temperature sensors stay near 100 °C while the liquid level falls and vapor is collected. Heater output and all other readings remain within operating limits. How should the operator interpret the flat temperature trend?
Correct answer: D - Treat it as expected phase-change behavior and continue the specified step
Operators warm a process liquid while holding its average velocity through a full circular pipe constant. Its dynamic viscosity decreases substantially; its density and the pipe diameter are effectively unchanged. What trend in flow behavior should they anticipate?
Correct answer: C - A higher Reynolds number, favoring turbulent flow
After a suction strainer becomes heavily restricted, a centrifugal pump develops a rattling sound and an unstable discharge. The liquid's vapor pressure is 25 kPa absolute at its operating temperature. The estimated minimum pressure at the impeller eye is 18 kPa absolute, recovering well above 25 kPa farther through the pump. Which mechanism best fits these findings?
Correct answer: B - Cavitation: vapor forms at the impeller eye and then collapses
The vacuum-drying procedure permits the next step when chamber pressure is between 20 and 35 kPa absolute. Local atmospheric pressure is 98 kPa, and the chamber's compound gauge reads −70 kPa gauge. All other start checks are complete. On this evidence, the operator should:
Correct answer: A - Proceed; chamber pressure is 28 kPa absolute
Samples from an alkaline wash bath are tested at 25 °C with a calibrated pH meter. The pH is 10.4 before use and 9.1 afterward. Without assuming why the change occurred, what do these readings establish?
Correct answer: B - The bath remained alkaline while its hydrogen-ion activity increased
With a control board isolated, absence of voltage verified, and stored energy discharged, a technician measures 620 Ω across a resistor marked 1.0 kΩ without disconnecting it. The schematic shows another resistor connected in parallel. Before deciding whether the 1.0 kΩ resistor has failed, the technician should:
Correct answer: D - Disconnect one lead of the 1.0 kΩ resistor, then measure that resistor again
During a steady holding stage, a batch tank's linear temperature transmitter sends 8 mA. Its range is 40 °C at 4 mA to 120 °C at 20 mA. The required holding band is 55-65 °C, and all other operating checks are satisfactory. Which entry correctly pairs the temperature with the operator's response?
Correct answer: C - 60 °C - maintain the present setting and monitor
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