XACTIMATE LEVEL 2 CERTIFICATION TEST
BANK COMPLETE SOLVED QUESTIONS
EXPERT REVIEW FULL SOLUTION
●● 18.5%
Answer: Level of oxygen in the air in the MR scanner room that you
SHOULD NOT SCAN if the O2 level falls below this percentage
This might occur if liquid helium, used on a daily basis as a coolant for
the magnet, were to escape and displace the oxygen in the room, causing
the percentage to drop
●● 19.5%
Answer: If oxygen level falls below ____ the oxygen monitor light is
trigger
●● 18.5%
Answer: Warning lights are triggered if the O2 level falls below ____
●● 14.4%
Answer: Sound alarm is triggered if the oxygen level falls below____
●● 11%
,Answer: Breathing becomes difficult if the O2 levels fall below ___
●● Quench or broken pipe
Answer: 2 times when helium would escape
●● 15-19.5%
Answer: Percentage of O2 that would cause decreased ability to work
strenuously, may impair coordination I and may induce symptoms in
persons with coronary, pulmonary, or circulatory problems
●● 12-15%
Answer: Respiration deepens, increased pulse rate and impaired
coordination, perception, judgement
●● 10-12%
Answer: Further increase in rate and depth of respiration, further
increase in pulse rate, performance failure, giddiness, poor judgement,
blue lips
●● 8-10%
Answer: Mental failure, nausea, vomiting, fainting, unconsciousness,
ashen face, blue lips
●● 608%
, Answer: 8 minutes may be fatal in 50-100% of exposures, 6 minutes
may fatal in 25-50% of exposures, 4-5 minutes = recovery with
treatment
●● 4-6%
Answer: Coma in 40 seconds, convulsions, respiration ceases, death
●● Quench
Answer: Liquid helium used to cool the magnet is vaporized ( hissing
noise) and released via an exhaust line, causing the temperature inside
the magnet to rise
This causes the magnetic field to lose superconductivity as the heat is
rapidly released
Helium displaces O2 in room: can cause dangerous drop in O2, helium
droplets on exhaust vent lines, frostbite
Can cause sever and expensive damage to magnet
●● Automatic quench
Answer: This occurs by the MRI scanner if the helium level has dropped
below 20%, there is sudden power loss
BANK COMPLETE SOLVED QUESTIONS
EXPERT REVIEW FULL SOLUTION
●● 18.5%
Answer: Level of oxygen in the air in the MR scanner room that you
SHOULD NOT SCAN if the O2 level falls below this percentage
This might occur if liquid helium, used on a daily basis as a coolant for
the magnet, were to escape and displace the oxygen in the room, causing
the percentage to drop
●● 19.5%
Answer: If oxygen level falls below ____ the oxygen monitor light is
trigger
●● 18.5%
Answer: Warning lights are triggered if the O2 level falls below ____
●● 14.4%
Answer: Sound alarm is triggered if the oxygen level falls below____
●● 11%
,Answer: Breathing becomes difficult if the O2 levels fall below ___
●● Quench or broken pipe
Answer: 2 times when helium would escape
●● 15-19.5%
Answer: Percentage of O2 that would cause decreased ability to work
strenuously, may impair coordination I and may induce symptoms in
persons with coronary, pulmonary, or circulatory problems
●● 12-15%
Answer: Respiration deepens, increased pulse rate and impaired
coordination, perception, judgement
●● 10-12%
Answer: Further increase in rate and depth of respiration, further
increase in pulse rate, performance failure, giddiness, poor judgement,
blue lips
●● 8-10%
Answer: Mental failure, nausea, vomiting, fainting, unconsciousness,
ashen face, blue lips
●● 608%
, Answer: 8 minutes may be fatal in 50-100% of exposures, 6 minutes
may fatal in 25-50% of exposures, 4-5 minutes = recovery with
treatment
●● 4-6%
Answer: Coma in 40 seconds, convulsions, respiration ceases, death
●● Quench
Answer: Liquid helium used to cool the magnet is vaporized ( hissing
noise) and released via an exhaust line, causing the temperature inside
the magnet to rise
This causes the magnetic field to lose superconductivity as the heat is
rapidly released
Helium displaces O2 in room: can cause dangerous drop in O2, helium
droplets on exhaust vent lines, frostbite
Can cause sever and expensive damage to magnet
●● Automatic quench
Answer: This occurs by the MRI scanner if the helium level has dropped
below 20%, there is sudden power loss
