9
At what distance should a person without hearing difficulties be able to hear an average
2 metres (6 feet)
From what age does hearing ability normally begin to decline?
30
What is white finger?
A disorder of the finger which may occur through continuous use of pneumatic tools because of reduced blood flow
Where are the responsibilities of Licensed Aircraft Engineers laid down?
AWN.3
What is the CAA standard for vision?
Acceptable corrected vision
The most common cause of myopia is
An elongated eyeball
A good team is one where every member has
An input
To focus on a near object, the lens of the eye must
Be thickened
70 80% of the total focusing ability of the eye is carried out by the
Cornea
Light enters the eye through the
Cornea
When someone is working in an enclosed space (such a fuel tank), another person should be outside the space in constant communication to
For safety reasons
Which of the following is least associated with the study of human factors?
Health and Safety
Successful working teams have the following attributes:-
Members participate in team activities but retain their own individual requirements
The difference between what a person 'can' do and what he will' do is largely determined by his
Motivation
The desire of an individual to 'conform' to a group by allowing one's opinions, attitudes and actions to be affected by prevailing conditions is known as
Peer pressure
The first stage in information processing is
Perception
If a person is colour blind, which colours would be most difficult to see?
Red and green
People with colour defective vision usually have difficulty differentiating between
Red and green
Which type of memory is most susceptible to interference from external
Short term
The working memory' is
Short term memory
The symptoms of de-motivation are very similar to the symptoms of
Stress
What happened to contribute towards the incident in 1995 where a Boeing 737 lost oil
The HP rotor drive covers of both engines had not been refitted after a boroscope inspection.
In AWN 47, what is the standard hearing test?
The ability to hear a conversation in a quiet room at 2 metres
What part of the eye is colour sensitive?.
The cones.
What part of the eye controls the amount of light that is allowed to enter the eye?
The iris
Risky shift' is
The tendency for a group of workers to arrive at a course of action which is riskier than that which any individual member might pursue
Long term memory capacity is usually
Unlimited
How long is the short term memory good for remembering 7 items?
Up to 30 seconds
What do you do when someone is hypothermic?
Warm them up
Which of the following defines a peer pressure situation?
Your colleagues pressuring you to work faster so they can go home.
The ear is used to detect
acceleration
The memory can be aided by
checklist
Extreme discomfort experienced by a maintenance engineer due to working in a confined space is known as
claustrophobia
The nose
filters, warms and moistens the air into the lungs.
A regular behaviour of an individual is known as
habit
The pupil of the eye grows smaller.
in condition of increased light
Most engineering related incidents are due to
installing components incorrectly.
An engineer who has developed his own way of performing a task
is in regular violation.
The 'cocktail party effect is descriptive of
selective attention.
Myopia is_____ and a_____ lens is needed to correct it
short sightedness and concave
The percentage of accidents attributable to aircraft maintenance and inspection causes
significant and rising.
Murphy's law can be regarded as the notion
something can go wrong it will'.
Iconic memory
stores visual information and lasts up to 1/2 second.
company's safety policy should be defined in
the Maintenance Organization Exposition.
Detail is best sensed by the_______ and movement best sensed by the______
the fovea and periphery
Peer pressure is
the perceived pressure to conform to what you believe your colleagues expect of you.
In a discussion, the person who is most likely to be agreed with is
the person with the highest status.
Motivation is
the thing that drives someone to do something.
A person with 20/40 vision has
worse eyesight as a person with 20/20 vision.
If a 737 had both engines serviced and lost oil from both engines in flight. This
would be a direct result of human error.
What causes the most aircraft accidents?
Communication
Murphy's law is perpetuated mainly by
Complacency
What type of lens is used to overcome short sightedness?.
Concave.
What type of lens is used to correct long sightedness?.
Convex.
The type of memory which is most easily influenced by a person's expectations of what should have happened is the
Episodic memory
What is peer group pressure?.
Our behaviour influenced by our friends and colleagues.
The inability for the eyes to accommodate sufficiently is known as
Presbyopia
At lower light levels, the visual sensing is performed mainly by the
Rods
Peripheral vision is detected by the
Rods
In AWN 47 what is the recommended hearing test?
The ability to hear an average conversation voice at a distance of 6 feet.
The eyesight of an engineer is the responsibility of
The engineer
Whose responsibility is it that an engineer remains current on new technology and procedures
The engineers
Colour defective vision affects
almost 1 in 10 of men.
The scientific study of measurements of the human body is known as
anthropometrics
An aircraft engineer who has 'responsibility'
are liable to be called to account as being in charge or control of, or answerable for something
Motor programmes
are stored as working rules in long term memory
If an image formed on the retina of the eye is inverted relative to the viewers normal perception of the image, the viewer will
behave and feel normal
According to Maslow, safety needs (protection from potentially dangerous objects or situations)
is second only to physiological needs (food drink, oxygen etc.).
Good aircraft maintenance supervisory judgment is usually based upon
knowledge and experience and reference to approved data.
The Otoliths detect
linear acceleration.
Hypermetropia is the medical name for
long sightedness.
A person with low self-esteem is
more likely to conform to peer pressure.
Learning of a routine by repeated practice is known as
motor programming
In an organization which practices human factors there is
no blame unless there is a deliberate violation.
An aircraft maintenance engineer who wears glasses or contact lenses should
not require their duties to be restricted providing they have frequent checks to ensure the adequacy of their glasses/contact lenses.
Visual Acuity is the ability
of the eye to discriminate sharp detail at varying distances.
The inability for the eyes to accommodate sufficiently is known as
presbyopia
To ensure that a technician remains reasonably current on the aircraft types to which they hold authorizations, they are required that
they are involved in at least 6 months of actual aircraft maintenance experience in any 2 year period and they have appropriate continuation/refresher training
A person can be said to be motivated if
they are taking action to achieve something.
Diffusion of responsibility may occur
to an individual working as a member of a team
The aim of human factors programs within an organizations is
to optimize the relationship between maintenance personnel and systems with a view to improving safety efficiency and well-being.
A perforated ear drum could occur if
you were subjected to continuous noise below 8 kHz.
Information in the short term memory not rehearsed will be lost in
10-20 seconds
Information, if not rehearsed is lost in
10-20 seconds
How long can the aural reflex protect the ear from loud noise?
15 minutes
Ultra short term memory has a duration of about
2 seconds
Ultra short term memory has a duration of about
2 seconds.
At what maximum frequency does the human ear hear?.
20.000 Hz (20kHz)
Presbyopia often effects the eyes of people after the age of
40
The amount of light which is allowed to enter the eye can vary by a factor of
5:1
Conductive deafness can be caused by damage to the
Cochlea
What range of sound is usually impaired first with the onset of presbycusis?.
High pitch sound
The incident where a 737 lost oil from both engines is a direct result of
Human error
What is the most common cause of in-flight engine shutdown?
Incomplete installation.
The impact of human factors and human error is most important to
It is equally important to technicians, engineers, planners and managers.
Accidents and engineering faults are
Signnificant and increasing
AWN 47 states that the engineer
does not report for work if unfit.
Confirmation bias' is
engineer's beliefs, and inattention to evidence which contradicts his beliefs.
An effective group work is when
everyone contributes in some way.
Organizational culture (whether good or bad) is best described as
the way we do things around here'.
