CASA ATPL AHUF QUESTIONS AND ANSWERS LATEST 2025
BMI formula - ANSWER-weight (kg) / height (m^2)
Most common cause of pilot incapacitation - ANSWER-Food and
drink poisoning
Most comfortable temperature range and relative humidity
range - ANSWER-21-27 degrees C at 40-60% relative humidity
Definition of heat stress type 1 and remedy - ANSWER-
Operating above 32 degs C best remedied by drinking water.
Definition of heat stress type 2 - ANSWER-Too much sun
through sunbathing, inadequate protection or liquid intake
Definition of heat stress type 3 - ANSWER-Temperatures below
10 degs C. Body loses more body heat than it can produce
resulting in hypothermia (cognitive impairment, apathy,
unconsciousness and ultimately death)
,Early sensation of dehydration - ANSWER-Dry nasal passage
and prickly eyes
Hours of non-flying required after a blood donation - ANSWER-
24 hours
Define (otic) Barotrauma - ANSWER-Stretching of ear drum due
to uneven air pressures between middle ear and ambient. (NO!
Any pain caused due to pressure differential)
Effect of (otic) barotrauma - ANSWER-Pressure vertigo of
ear/balance mechanism causing dizziness
What does the Valsave manoeuvre do? - ANSWER-Forces air via
Eustascian Tube into middle ear to increase pressure equal to
ambient
What are sinuses? - ANSWER-Cavities in the skull that are lined
with a mucus membrane that can swell to block venting.
Aggravated by pressure differential during descent.
Litres of body fluids lost during a hot day - ANSWER-5
,Effect of eating green vegetables prior to flight - ANSWER-
Expansion/release of gases in digestive system due to low
ambient pressure
Alcohol consumed with food increases rate of alcohol
absorption or rate of alcohol removal? - ANSWER-Only increase
alcohol absorption. Rate of alcohol removal cannot be changed.
Percentage of alcohol break down in liver compared to other
mechanism (including respiration, expiration and urine). -
ANSWER-90% in liver. 10% through respiration, expiration and
urine.
Standard drink units of alcohol metabolised per hour in an
adult male. - ANSWER-1 standard drink.
Number of hours alcohol is present in brain after consumption.
- ANSWER-24 hours.
Recommended maximum number of standard drinks 24 hours
prior to flight. - ANSWER-1-2 standard drinks.
Maximum recommended standard drinks consumed a week for
a male and female. - ANSWER-21-28 standard drinks for a male
and 14-21 standard drinks for a female.
, Definition of "analgesic" medication. - ANSWER-Painkiller
Definition of "antihistamine" medication. - ANSWER-Clears up
congestion.
Definition of "ephedrine" medication. - ANSWER-Nasal sprays.
Definition of hyperventilation. - ANSWER-Excessive breathing
causing removal of too much carbon dioxide from blood.
Fraction of standard atmospheric pressure at 18000ft? -
ANSWER-Half.
Air expands in cavities and vents into the nasal regions during a
climb or descent? - ANSWER-Climb.
When 30m (100ft) below water, how many times the standard
atmospheric pressure is experienced? - ANSWER-Twice.
Typical foods to avoid when flying due to bloating. - ANSWER-
Beer, cabbage and beans.
BMI formula - ANSWER-weight (kg) / height (m^2)
Most common cause of pilot incapacitation - ANSWER-Food and
drink poisoning
Most comfortable temperature range and relative humidity
range - ANSWER-21-27 degrees C at 40-60% relative humidity
Definition of heat stress type 1 and remedy - ANSWER-
Operating above 32 degs C best remedied by drinking water.
Definition of heat stress type 2 - ANSWER-Too much sun
through sunbathing, inadequate protection or liquid intake
Definition of heat stress type 3 - ANSWER-Temperatures below
10 degs C. Body loses more body heat than it can produce
resulting in hypothermia (cognitive impairment, apathy,
unconsciousness and ultimately death)
,Early sensation of dehydration - ANSWER-Dry nasal passage
and prickly eyes
Hours of non-flying required after a blood donation - ANSWER-
24 hours
Define (otic) Barotrauma - ANSWER-Stretching of ear drum due
to uneven air pressures between middle ear and ambient. (NO!
Any pain caused due to pressure differential)
Effect of (otic) barotrauma - ANSWER-Pressure vertigo of
ear/balance mechanism causing dizziness
What does the Valsave manoeuvre do? - ANSWER-Forces air via
Eustascian Tube into middle ear to increase pressure equal to
ambient
What are sinuses? - ANSWER-Cavities in the skull that are lined
with a mucus membrane that can swell to block venting.
Aggravated by pressure differential during descent.
Litres of body fluids lost during a hot day - ANSWER-5
,Effect of eating green vegetables prior to flight - ANSWER-
Expansion/release of gases in digestive system due to low
ambient pressure
Alcohol consumed with food increases rate of alcohol
absorption or rate of alcohol removal? - ANSWER-Only increase
alcohol absorption. Rate of alcohol removal cannot be changed.
Percentage of alcohol break down in liver compared to other
mechanism (including respiration, expiration and urine). -
ANSWER-90% in liver. 10% through respiration, expiration and
urine.
Standard drink units of alcohol metabolised per hour in an
adult male. - ANSWER-1 standard drink.
Number of hours alcohol is present in brain after consumption.
- ANSWER-24 hours.
Recommended maximum number of standard drinks 24 hours
prior to flight. - ANSWER-1-2 standard drinks.
Maximum recommended standard drinks consumed a week for
a male and female. - ANSWER-21-28 standard drinks for a male
and 14-21 standard drinks for a female.
, Definition of "analgesic" medication. - ANSWER-Painkiller
Definition of "antihistamine" medication. - ANSWER-Clears up
congestion.
Definition of "ephedrine" medication. - ANSWER-Nasal sprays.
Definition of hyperventilation. - ANSWER-Excessive breathing
causing removal of too much carbon dioxide from blood.
Fraction of standard atmospheric pressure at 18000ft? -
ANSWER-Half.
Air expands in cavities and vents into the nasal regions during a
climb or descent? - ANSWER-Climb.
When 30m (100ft) below water, how many times the standard
atmospheric pressure is experienced? - ANSWER-Twice.
Typical foods to avoid when flying due to bloating. - ANSWER-
Beer, cabbage and beans.
