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...