PCS Safety Procedures 2

Question 1

Per OSHA's permit-required confined space standard, an atmosphere is considered hazardous when flammable vapor exceeds what percentage of the LEL?

Accepted Answer

10%

Answer

29 CFR 1910.146 defines flammable gas or vapor above 10% of the LEL as a hazardous atmosphere.

Question 2

What is the acceptable oxygen range for confined space entry under OSHA?

Accepted Answer

19.5% to 23.5%

Answer

Below 19.5% is oxygen-deficient and above 23.5% is oxygen-enriched.

Question 3

In what order should a multi-gas meter test a confined space atmosphere?

Accepted Answer

Oxygen, flammables, toxics

Answer

Oxygen is tested first because many combustible sensors need adequate oxygen to read accurately.

Question 4

What role must the confined space attendant NOT perform?

Accepted Answer

Enter the space to perform rescue

Answer

Attendants must remain outside and must not enter to attempt rescue unless relieved by another attendant.

Question 5

For vertical entry into a permit space deeper than 5 feet, what is required?

Accepted Answer

A mechanical retrieval device

Answer

OSHA requires a mechanical retrieval device for vertical entries over 5 feet deep.

PCS - Protective Coatings Specialist Certification Practice Test