Free MRSO Cryogen Safety Questions and Answers

Question 1

What is the primary and most immediate danger to personnel inside the magnet room during a quench?

Accepted Answer

Asphyxiation due to oxygen displacement

Answer

During a quench, liquid helium rapidly boils off into a massive volume of helium gas, which displaces the oxygen in the room. This creates a significant and immediate risk of asphyxiation if personnel cannot evacuate the room instantly.

Question 2

What is the minimum required Personal Protective Equipment (PPE) when handling or transferring liquid cryogens?

Accepted Answer

Insulated gloves, a face shield/goggles, and closed-toe shoes

Answer

Handling cryogens poses severe risks of frostbite from skin contact and permanent eye damage from splashes. The minimum required PPE includes insulated (cryogenic) gloves, a face shield or safety goggles to protect the face and eyes, and fully enclosed shoes to protect the feet from spills.

Question 3

Where is the proper location for storing a dewar of liquid helium?

Accepted Answer

In a well-ventilated area, away from patient care areas

Answer

Cryogen dewars must be stored in a well-ventilated area to prevent the buildup of gas from normal, expected boil-off. Storing them in a sealed room could lead to an oxygen-deficient atmosphere, creating a serious safety hazard.

Question 4

An oxygen (O2) monitor in the magnet room alarms, showing a level of 18.5%. What is the appropriate first action?

Accepted Answer

Immediately evacuate all personnel from the magnet room

Answer

An oxygen level below 19.5% is considered an oxygen-deficient atmosphere by OSHA, and 18.5% represents a significant danger to life. The immediate priority is to evacuate all personnel from the potentially hazardous environment before taking any other action.

Question 5

What is the primary function of the quench pipe or vent?

Accepted Answer

To safely vent helium gas outside the building during a quench

Answer

The quench pipe is a critical safety feature designed to direct the massive volume of helium gas generated during a quench away from the magnet room and safely outside the building. This prevents a catastrophic pressure buildup and asphyxiation hazard within the facility.

MRSO - Magnetic Resonance Safety Officer Practice Test

MRSO - Magnetic Resonance Safety Officer Practice Test

Free MRSO Cryogen Safety Questions and Answers