FAA Powerplant Written Practice Test

What technique is recommended when tightening exhaust system clamps?

1. Use a hammer for maximum tightness

2. Wrench down firmly without any aids

3. Tap the clamps with a rawhide mallet to prevent binding

4. Ensure it is completely dry before tightening

The correct answer is: Tap the clamps with a rawhide mallet to prevent binding

The recommended technique for tightening exhaust system clamps involves tapping the clamps with a rawhide mallet to prevent binding. This method is advantageous because it allows for a gentle application of force that encourages the clamp to seat properly without damaging the components or causing misalignment. Tapping with a rawhide mallet helps provide even pressure around the clamp while minimizing the risk of overtightening, which could lead to deformation or stress on the exhaust system parts. Using a hammer, as suggested in one of the other choices, can lead to excessive force, potentially damaging the clamps or the exhaust housing. Wrenching down firmly without any aids may not ensure an even distribution of pressure, which is critical for maintaining a good seal and preventing leaks. Lastly, ensuring that the area is dry before tightening is not a standard practice for exhaust clamps, as moisture isn't typically a concern for the clamping mechanism itself; the focus should be on proper alignment and even tightening.