EV Troubleshooting — real-world interview & field troubleshooting questions with clear, practical answers. Tap any question to open its answer. Showing the first 70 questions free. The complete question bank is available as a PDF below. EV Safety, High-Voltage Basics & Interlocks Q1 An EV will not power up after a repair. What should you check before touching the high-voltage system? Answer I will first follow the manufacturer's shutdown and high-voltage isolation procedure. I will verify the vehicle is in a safe state, disconnect the approved service disconnect where applicable, wait the specified discharge time, and confirm absence of hazardous voltage with the correct CAT-rated meter and PPE. I will never bypass interlocks or improvise a high-voltage isolation method. Q2 Why are orange cables used in EVs, and what does that mean during troubleshooting? Answer Orange cables normally identify high-voltage circuits. I treat any orange cable or component as potentially...

Pneumatic Troubleshooting — real-world interview & field troubleshooting questions with clear, practical answers. Tap any question to open its answer. Showing the first 70 questions free. The complete question bank is available as a PDF below. Compressor & Air Supply Q1 The pneumatic machine suddenly becomes weak and several cylinders move slowly. What would you check first? Answer Check the compressor outlet pressure, receiver pressure, and the pressure at the machine inlet while the machine is actually operating. If pressure falls sharply under load, inspect compressor capacity, leaks, clogged intake filters, and undersized piping before changing the actuator. Q2 The compressor reaches its cut-out pressure but the machine still cannot complete its stroke. How would you troubleshoot it? Answer Measure pressure at the machine during the stroke rather than relying on the receiver gauge. A large pressure drop can indicate a blocked line, dirty FRL filter, undersized hose, or...

Quality and Measurement Troubleshooting — real-world interview & field troubleshooting questions with clear, practical answers. Tap any question to open its answer. Showing the first 70 questions free. The complete question bank is available as a PDF below. VERNIER CALIPERS, MICROMETERS & HAND METROLOGY TOOLS Q1 A digital outside micrometer consistently reads +0.006 mm higher than a calibrated Grade 0 gauge block. How do you isolate and correct the error? Answer Clean the carbide measuring faces with optical lint-free paper. Inspect the anvils under low-angle light for micro-burrs or debris. If the faces are pristine, close the thimble using strictly the friction ratchet / thimble stop (1.5–2 N force) to observe mechanical zero offset. Adjust the zero datum line using the provided C-spanner on the sleeve, or re-zero the digital electronic display. Q2 Operators measure the same machined shaft with vernier calipers and get readings differing by 0.05 mm across shifts. Roo...