ABSA 5th Class Practice Exam

The chosen option identifies important factors that can lead to pressure explosions.

The effects of corrosion can compromise the structural integrity of containers and piping systems, making them more susceptible to failure under pressure. When a vessel is weakened due to corrosion, it cannot withstand high pressures, increasing the risk of an explosion.

A weak pilot flame is critical for maintaining a safe combustion process. If the pilot flame is weak, it may not effectively ignite the gas, leading to unburned fuel accumulation, which can create an explosive environment when mixed with air.

Stressed material due to heating too quickly can cause thermal shock. Rapid temperature changes can lead to uneven expansion of materials, creating stress points that might fail under pressure. This can lead to catastrophic failures like explosions if the material cannot withstand the sudden changes in pressure and temperature.

This combination of factors highlights how mechanical integrity, proper ignition, and temperature management are essential to prevent pressure explosions.