CARO - Certified Assistant Refrigeration Operator Ammonia Refrigeration Safety Questions and Answers

Question 1

A facility has an ammonia refrigeration system containing 12,000 pounds of anhydrous ammonia. Which of the following OSHA standards is the primary regulation they must follow for safety management?

Accepted Answer

29 CFR 1910.119 - Process Safety Management (PSM)

Answer

The General Duty Clause

Answer

29 CFR 1910.134 - Respiratory Protection

Answer

29 CFR 1910.120 - HAZWOPER

Question 2

An operator is responding to an ammonia leak in a machinery room where the ammonia concentration is unknown but a visible cloud is present. What is the minimum level of Personal Protective Equipment (PPE) required for entry?

Accepted Answer

Level A: Fully encapsulating, vapor-tight suit with a self-contained breathing apparatus (SCBA)

Answer

Level C: Full-face air-purifying respirator and chemical-resistant clothing

Answer

Level D: Standard work uniform with safety glasses and gloves

Answer

Level B: Self-contained breathing apparatus (SCBA) with chemical-resistant clothing

Question 3

According to IIAR standards, what is the required action for the emergency ventilation system in an ammonia machinery room when an ammonia detector is activated at a concentration of 150 ppm?

Accepted Answer

The ventilation system must automatically activate.

Answer

A visual alarm should activate, but the fans remain off.

Answer

An operator must manually start the emergency fans within 5 minutes.

Answer

The system should shut down all power to the machinery room.

Question 4

During a routine tour, a Certified Assistant Refrigeration Operator (CARO) discovers a small, weeping leak from a valve stem packing nut. There is a faint smell of ammonia, but no visible cloud, and the area's ammonia detector is not in alarm. What is the most appropriate initial action?

Accepted Answer

Notify the supervising operator or chief engineer immediately and keep a safe distance.

Answer

Immediately activate the full emergency shutdown for the entire facility.

Answer

Attempt to tighten the packing nut using a standard adjustable wrench.

Answer

Evacuate the machinery room and call 911.

Question 5

Which of the following is a key requirement for an emergency shutdown procedure in an ammonia refrigeration facility?

Accepted Answer

It must define conditions for shutdown and assign responsibility to qualified operators.

Answer

It must be reviewed and updated every 10 years.

Answer

Only certified emergency responders are allowed to initiate a shutdown.

Answer

The procedure must be posted only in the main office.

Question 6

The IIAR 2 standard specifies requirements for the safe design of ammonia refrigeration systems. What is the minimum required discharge velocity for emergency ventilation fans from a machinery room?

Accepted Answer

2,500 feet-per-minute

Answer

500 feet-per-minute

Answer

1,000 feet-per-minute

Answer

5,000 feet-per-minute

A facility has an ammonia refrigeration system containing 12,000 pounds of anhydrous ammonia.Which of the following OSHA standards is the primary regulation they must follow for safety management?

A facility has an ammonia refrigeration system containing 12,000 pounds of anhydrous ammonia.
Which of the following OSHA standards is the primary regulation they must follow for safety management?