Differences Between Closed-Loop and Open-Loop CT-AUT Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A test engineer is comparing open-loop and closed-loop testing for a battery management system (BMS) that controls charging current based on battery temperature. The BMS's output (charging current) affects the temperature. Which statement correctly describes the key difference in test design?

   • AClosed-loop testing requires a thermal model that reacts to the charging current, while open-loop testing uses a predefined temperature profile.
   • BOpen-loop testing is more realistic because it uses real temperature data.
   • CBoth approaches require the same test design because the BMS logic is the same.
   • DOpen-loop testing requires a thermal model of the battery, while closed-loop does not.
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   What is a primary disadvantage of closed-loop testing?

   • AIncreased complexity and difficulty in reproducing exact test conditions.
   • BLower fidelity of the test environment.
   • CLess realistic simulation of the environment.
   • DReduced ability to test control systems.
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   In open-loop testing, what is the role of the environment or surrounding systems?

   • AIt is not considered at all; the system is tested in isolation.
   • BIt reacts to the system under test's outputs in real time.
   • CIt provides predefined inputs that do not change based on the system's outputs.
   • DIt is simulated with high fidelity to provide realistic feedback.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   How does the presence of feedback affect the realism of a test?

   • AFeedback reduces realism because it makes the test unpredictable.
   • BFeedback increases realism because the system experiences dynamic responses similar to real-world conditions.
   • CFeedback has no effect on realism; realism depends only on the accuracy of the inputs.
   • DFeedback increases realism only if the simulation is hardware-based.
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   Which of the following is an example of an open-loop testing application?

   • ATesting an adaptive suspension system's response to a simulated road profile.
   • BTesting a stability control system's response to a simulated skid.
   • CTesting a parking assist system's response to a simulated obstacle.
   • DTesting a software module that computes a checksum for a given data packet.
   Reveal Solution Discussion Select an answer first