CARO Safety Procedures & Regulations 2

Question 1

Under OSHA's Process Safety Management standard (29 CFR 1910.119), at what quantity of anhydrous ammonia does a refrigeration system become covered?

Accepted Answer

10,000 pounds

Answer

OSHA PSM applies to processes containing 10,000 pounds or more of anhydrous ammonia.

Question 2

What is the OSHA permissible exposure limit (PEL) for ammonia as an 8-hour time-weighted average?

Accepted Answer

50 ppm

Answer

OSHA sets the ammonia PEL at 50 ppm as an 8-hour TWA.

Question 3

What ammonia concentration does NIOSH list as Immediately Dangerous to Life or Health (IDLH)?

Accepted Answer

300 ppm

Answer

NIOSH lists 300 ppm as the IDLH concentration for ammonia.

Question 4

Under PSM, how often must a Process Hazard Analysis (PHA) be updated and revalidated?

Accepted Answer

Every 5 years

Answer

PSM requires PHAs to be updated and revalidated at least every five years.

Question 5

Before an operator works on a compressor motor, which OSHA standard governs isolating its energy sources?

Accepted Answer

29 CFR 1910.147 Control of Hazardous Energy

Answer

Lockout/tagout is governed by 29 CFR 1910.147, the control of hazardous energy standard.

CARO - Certified Assistant Refrigeration Operator Practice Test