Breath Tech UPDATED ACTUAL Exam
Questions and CORRECT Answers
What does this Status Message mean: Insufficient Sample - CORRECT ANSWER - The
Sample acceptance criteria has not been met
What is the definition of the Intox EC/IR II? - CORRECT ANSWER - The Intox EC/IR II
is an approved instrument which analyzes a sample of deep lung air and reports the results in
milligrams of alcohol in 100 millilitres of blood.
What is Henry's Law? - CORRECT ANSWER - At a given temperature the saturated
vapour above a solution contains a concentration of solute proportional to the concentration of
the solute in the solution.
What is Henry's Law applied to breath testing? - CORRECT ANSWER - At 34°C the deep
lung air contains a concentration of alcohol proportional to the concentration of the alcohol in the
blood.
What is the Breath Blood ratio? - CORRECT ANSWER - At 34°C, 2100 parts of deep
lung air contain the same amount of alcohol as 1 part of blood.
What are the factors that can affect a breath test result? (3) - CORRECT ANSWER - 1.
Breath Temperature
2. Mouth Alcohol
3. Shallow Blow
What is the margin of acceptability? - CORRECT ANSWER - The margin of acceptability
for the Intox EC/IR II is an alcohol standard result within 10% of the target value of the alcohol
standard. (100mg% is 90 - 110)
What are the two distinct analytical techniques to achieve a blood alcohol concentration (BAC)
result? (2) - CORRECT ANSWER - 1. Infrared Analysis (IR)
, 2. Electrochemical (EC) sensor (fuelcell)
What is the Infrared analysis? (2) - CORRECT ANSWER - 1. Monitors the quality of the
breath sample and is used to detect residual alcohol in the mouth.
2 . The flow sensor continuously monitors the breath sample to determine the exact moment to
introduce the sample to the fuel cell component of the instrument for final analyses
What is the Electrochemical (EC) sensor (fuelcell)? (2) - CORRECT ANSWER - 1. It is
specific to alcohol and facilitates a chemical reaction that results in an electrical current
2. The current is then used to calculate the blood alcohol content present in each sample
analyzed.
What is the measurement range of the instrument? - CORRECT ANSWER - 0 to
550milligrams of ethanol in 100millilitres of blood
What does the front display show? (4) - CORRECT ANSWER - 1. Location
2. Instrument serial number
3. Date and time
4. Any warning conditions that may affect the operation of the instrument
How does the pressure sensor tubing work? (2) - CORRECT ANSWER - 1. Monitors the
flow rate and volume of the subject's breath used.
2. Monitors ambient atmospheric pressure to determine the correction factor for dry gas
standards. This reading is used to determine the target value for the dry gas alcohol standard at
the time of the test (the target value varies according to atmospheric pressure).
How does the instrument protect against radio frequency interference (RFI)? (2) - CORRECT
ANSWER - 1. This cage, which includes the design and sealing of the metal body of the
instrument, is found over the sensitive components on the motherboard
2. Faraday cage is an enclosed conducting shell that shields its interior from strong electric fields
and electromagnetic waves.
Questions and CORRECT Answers
What does this Status Message mean: Insufficient Sample - CORRECT ANSWER - The
Sample acceptance criteria has not been met
What is the definition of the Intox EC/IR II? - CORRECT ANSWER - The Intox EC/IR II
is an approved instrument which analyzes a sample of deep lung air and reports the results in
milligrams of alcohol in 100 millilitres of blood.
What is Henry's Law? - CORRECT ANSWER - At a given temperature the saturated
vapour above a solution contains a concentration of solute proportional to the concentration of
the solute in the solution.
What is Henry's Law applied to breath testing? - CORRECT ANSWER - At 34°C the deep
lung air contains a concentration of alcohol proportional to the concentration of the alcohol in the
blood.
What is the Breath Blood ratio? - CORRECT ANSWER - At 34°C, 2100 parts of deep
lung air contain the same amount of alcohol as 1 part of blood.
What are the factors that can affect a breath test result? (3) - CORRECT ANSWER - 1.
Breath Temperature
2. Mouth Alcohol
3. Shallow Blow
What is the margin of acceptability? - CORRECT ANSWER - The margin of acceptability
for the Intox EC/IR II is an alcohol standard result within 10% of the target value of the alcohol
standard. (100mg% is 90 - 110)
What are the two distinct analytical techniques to achieve a blood alcohol concentration (BAC)
result? (2) - CORRECT ANSWER - 1. Infrared Analysis (IR)
, 2. Electrochemical (EC) sensor (fuelcell)
What is the Infrared analysis? (2) - CORRECT ANSWER - 1. Monitors the quality of the
breath sample and is used to detect residual alcohol in the mouth.
2 . The flow sensor continuously monitors the breath sample to determine the exact moment to
introduce the sample to the fuel cell component of the instrument for final analyses
What is the Electrochemical (EC) sensor (fuelcell)? (2) - CORRECT ANSWER - 1. It is
specific to alcohol and facilitates a chemical reaction that results in an electrical current
2. The current is then used to calculate the blood alcohol content present in each sample
analyzed.
What is the measurement range of the instrument? - CORRECT ANSWER - 0 to
550milligrams of ethanol in 100millilitres of blood
What does the front display show? (4) - CORRECT ANSWER - 1. Location
2. Instrument serial number
3. Date and time
4. Any warning conditions that may affect the operation of the instrument
How does the pressure sensor tubing work? (2) - CORRECT ANSWER - 1. Monitors the
flow rate and volume of the subject's breath used.
2. Monitors ambient atmospheric pressure to determine the correction factor for dry gas
standards. This reading is used to determine the target value for the dry gas alcohol standard at
the time of the test (the target value varies according to atmospheric pressure).
How does the instrument protect against radio frequency interference (RFI)? (2) - CORRECT
ANSWER - 1. This cage, which includes the design and sealing of the metal body of the
instrument, is found over the sensitive components on the motherboard
2. Faraday cage is an enclosed conducting shell that shields its interior from strong electric fields
and electromagnetic waves.
