Wastewater Treatment Operator Certification Practice Test

Which of the following is not true about permitted confined space entry?

1. Wear an approved harness with an attached line

2. If the entry is made through a top opening, use a hoisting device with a harness that suspends a person in an upright position

3. Testing for atmospheric hazards is not required as long as a blower is in use

4. Wear protective clothing when entering a confined space that contains corrosive substances

The correct answer is: Testing for atmospheric hazards is not required as long as a blower is in use

The statement regarding testing for atmospheric hazards not being required as long as a blower is in use is inaccurate. In confined space entry procedures, testing for atmospheric hazards is a critical safety measure that must be conducted regardless of the ventilation methods employed, such as using a blower. This is to ensure that the space is free from harmful gases, vapors, or oxygen deficiency before entry. Relying solely on a blower could lead to dangerous situations if toxic or flammable atmospheres still exist within the space. In contrast, the other statements align with standard safety practices for confined space entry. Wearing an approved harness with an attached line is essential to ensure that workers can be safely retrieved in emergencies. Using a hoisting device with a harness that keeps a person in an upright position when entering from the top helps prevent falls or injuries. Furthermore, wearing protective clothing when entering spaces containing corrosive substances is crucial to protect personnel from potential chemical exposure.