HF Physiology Practice Questions Flashcards
The average piston engined aeroplanes noise level is:
a.
85 - 110 dB
b.
50 - 100 dB
c.
100 - 200 dB
d.
100 - 150 dB
The correct answer is: 85 - 110 dB
Which of the following has symptoms of positive G?
a.
tunnel vision, greyout, redout, G-LOC
b.
colour vision deterioration, tunnel vision, greyout, blackout
c.
headache, breathing difficulty, slowing heart rate
d.
tunnel vision, greyout, slowing heart rate
The correct answer is: colour vision deterioration, tunnel vision, greyout, blackout
The most common human errors that caused aircraft accidents are
a.
handling errors
b.
decision making errors
c.
errors caused by lack of knowledge
d.
errors caused by lack of experience
The correct answer is: decision making errors
One of the functions of the outer ear is to
a.
equalise the pressure on either side of the eardrum
b.
send nerve impulses to the brain
c.
protect the eardrum from intrusions of foreign bodies
d.
send vibration to cochlea
The correct answer is: protect the eardrum from intrusions of foreign bodies
What is the percentage of Carbon Dioxide in the atmosphere?
a.
78%
b.
0.03%
c.
1%
d.
21%
The correct answer is: 0.03%
Each passenger must be provided with supplemental oxygen at all times at which an unpressurised aircraft is operating above
a.
10,000ft
b.
14,000ft
c.
8,000ft
d.
20,000ft
The correct answer is: 14,000ft
Which component of the inner ear senses changes in speed with constant direction (linear acceleration)?
a.
otoliths
b.
semi-circular canal
c.
cochlea
d.
eardrum
The correct answer is: otoliths
When established in a balanced level turn at constant bank angle, the hair cells of the semi-circular canals will be
a.
deflected in the direction of turn
b.
waving back and forth
c.
in the rest position with no deflection
d.
deflected in the opposite direction to the turn
The correct answer is: in the rest position with no deflection
Eyes adapt to changes in ambient light intensity by adjusting
a.
the cornea and the shape of the lens
b.
the position of the rods and cones
c.
the iris to change the shape of the pupil and making chemical changes in the retina
d.
the shape of the lens with the ciliary muscle
The correct answer is: the iris to change the shape of the pupil and making chemical changes in the retina
Which one will not reduce performance of a pilot in the flight deck?
a.
constant noise
b.
5% of humidity
c.
temperature off 20°C
d.
constant vibration
The correct answer is: temperature off 20°C
Which phase of a flight is likely to be more of a problem to a blocked Eustachian tube than the rest?
a.
climb, with the volume of gas in the middle ear increasing
b.
climb, with the volume of gas in the inner ear increasing
c.
descent, with the volume of gas in the middle ear decreasing
d.
descent, with the volume of gas in the inner ear decreasing
The correct answer is: descent, with the volume of gas in the middle ear decreasing
During repeated turns with constant angle of bank and speed, the hair cells of cupula in the semi-circular canals go back to the position of:
a.
upright
b.
tumble around
c.
tilted in the opposite direction to the turn
d.
tilted in the same direction as the turn
The correct answer is: upright
The most common reason for ‘in flight incapacitation’ is
a.
heart attack
b.
dehydration
c.
decompression
d.
food poisoning
The correct answer is: food poisoning
At an altitude of 18000ft the ambient atmospheric pressure is approximately
a.
one third of sea level value
b.
One half of its sea level value
c.
two thirds of its sea level value
d.
one tenth of its sea level value
The correct answer is: One half of its sea level value
Which of the following is a function of the middle ear?
a.
to maintain the sense of balance
b.
to sense linear velocity
c.
to convert the mechanical energy of vibration to nerve signals
d.
to amplify the vibrations and transfer to the cochlea
The correct answer is: to amplify the vibrations and transfer to the cochlea
What is the approximate cabin altitude above which you must breathe 100% oxygen if you are to maintain an alveolar partial pressure equal to that of sea level?
a.
10,000ft
b.
40,000ft
c.
30,000ft
d.
33,700ft
The correct answer is: 33,700ft
Before flying, the minimum recommended period after a three and a half hour SCUBA diving that requires decompression stops is
a.
4 hours
b.
12 hours
c.
48 hours
d.
24 hours
The correct answer is: 12 hours
At a depth of about 30 feet, the underwater pressure is closest to
a.
One half of normal sea level atmospheric pressure
b.
two times normal sea level atmospheric pressure
c.
three times normal sea level atmospheric pressure
d.
one and a half time normal sea level atmospheric pressure
The correct answer is: two times normal sea level atmospheric pressure
Which of the following is true about pilots taking medications before flight?
a.
any ‘over the counter medicine’ can be considered safe
b.
DAME’s opinion should be sought before using any medications
c.
prescribed medications by a doctor can be considered safe
d.
medications can be considered safe unless there is a warning on the packet
The correct answer is: DAME’s opinion should be sought before using any medications
What are the possible side effects of Aspirin?
a.
melanoma
b.
insomnia, high blood pressure
c.
stomach bleeding, kidney or Liver problems
d.
drowsiness, sleepiness
The correct answer is: stomach bleeding, kidney or Liver problems
Which of the following is not a symptom of carbon monoxide poisoning?
a.
headache and fatigue
b.
euphoria
c.
mental confusion, vision impairment
d.
cherry red complexion
The correct answer is: euphoria
The minimum recommended period to stay on the ground after a blood donation is
a.
48 hrs
b.
12 hrs
c.
36 hrs
d.
24 hrs
The correct answer is: 24 hrs
Vestibular apparatus consists of
a.
semicircular canals and cochlea
b.
Eustachian tube and cochlea
c.
semicircular canals and otoliths
d.
otoliths and ossicles
The correct answer is: semicircular canals and otoliths
An organ in the inner ear that provides a sense of balance is
a.
Eustachian tube
b.
ossicles
c.
semicircular canals
d.
cochlea
The correct answer is: semicircular canals
Astigmatism is caused by
a.
unevenness of the curvature of the cornea
b.
age changes
c.
short sightedness
d.
long sightedness
The correct answer is: unevenness of the curvature of the cornea