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WorksheetsH2: Human Performance and Limitations
Total questions: 35
Worksheet time: 18mins
Which one of the lists below contains only internal performance shaping factors that may adversely affect the engineer in the performance of maintenance tasks?
Lack of proper training, poor workspace layout and high stress levels.
High stress levels, lack of basic engineering skills and a marriage breakdown.
Poor workspace layout, adverse environmental conditions and poorly designed maintenance stands.
Which one of the following lists correctly identifies the important human senses?
Vision, audition, touch, smell, taste, vestibular, kinesthetic and psychic
Vestibular, kinesthetic, audition, touch, taste, smell, vision and proprioceptive
Intuition, kinesthetic, audition, touch, taste, smell, vision and proprioceptive
Concentration span for a repetitive maintenance task is
30 minutes
120 minutes
180 minutes
Working memory (short-term memory)
does not preserve the physical details
rapidly decays in the visual, auditory and kinesthetic stores
is not pre-attentive (i.e. conscious attention is required)
Judgement is a combination of
headwork and attitude
experience and exposure
decision making and responsibility
Effective decision making includes
taking a vote as this is the most democratic.
listening to and considering the viewpoints of the other technicians.
relying on personal feelings as these are most often correct.
A LAE makes use of his sight to perform aircraft maintenance inspections. Peripheral vision accuracy is measured
at an acute angle of 90 degrees from the line of vision.
at ±10 degrees from the line of vision.
only straight ahead in the line of vision.
During an inspection of structure, we cannot rely on peripheral vision. The arc of accurate vision in most people is
90 degrees from the eye
10 degrees from the centre of the eye
only straight ahead from the eye
Internal and external performance shaping factors (PSF) can be considered as
positive
positive or negative
negative
Performance Shaping Factor (PSF) is a major contributing factor in maintenance error. PSF consists of internal and external. Which of the following is external PSF?
Improper tooling and poor working condition
Illness and disturbance from family matters
Pressure from management
Most people are more likely to suffer from hypoxia when the altitude is
higher than 10,000 feet
between 5,000 to 10,000 feet
below 5,000 feet
Humans use their various senses as they interact with their environment. Some of the senses we rely on are vision, smell, touch, and taste. Using these senses help us to:
Work more effective as a team.
Gain information, process this information and take certain actions.
Completely eliminate errors in our workplace.
The 5 basic senses, namely vision, olfactory, auditory, gustatory and touch, are used by us to
move our body.
gather information and process it.
detect balance, motion, and acceleration.
You have given instructions to your subordinates. You have to ensure that they have perceived your instructions correctly. What factors affect perception other than the information you just gave?
Attitude, Expectations, Experience and Motivation
Qualifications, Intelligence, Attitude and Ambition
Qualifications, Experience, Age and Gender
When you have a fear of height and are asked to do inspection at a high platform, you should
wear non-slip shoes.
use proper harness and safety rope.
ask another Engineer to accompany you.
come down and said the job is done.
Long sighted people have an eyeball that is
shorter than normal.
longer than normal.
oval.
When the intensity of light increases, the pupil of the eye will
grow smaller
grow larger
not be affected
Motor Programmes are stored in the
long-term memory as behavioural sub-routines
short-term memory as reflex actions
sensory stores as automatic actions
The capacity of the short-term memory may be increased by
rehearsing information
breaking information into ‘chunks’
transferring information into long-term memory
The maximum number of unrelated items of information that can be stored in the working memory at any one time is normally limited to between
4 and 5
5 and 9
9 and 11
Information can be held in the working memory for
5 to 10 minutes
1 to 2 seconds
10 to 20 seconds
The distance that a person with normal hearing should be able to hear an average conversational voice in a quiet room is
two metres
three metres
four metres
Performance shaping factors affect work performance and attention to danger in the workplace and stress is one of them. Which of the following is true regarding stress?
Stress level is the same regardless of person.
Stress is caused by increasing workload.
Stress levels can vary greatly from person to person.
As a Licensed Aircraft Engineer and a supervisor, you will be constantly required to make decisions which affect safety and work output. The two main ingredients of a good decision are
quality and wisdom of the decision and acceptance and implementation by those affected by the decision.
the economics and the safety impact on the organisation.
the speed and accuracy with which the decision was made.
When a person is said to be suffering from colour-defective vision, which two colours he would not be able to distinguish clearly?
red and yellow
black and white
red and green
If an engineer is having trouble distinguishing between blue and yellow wire in an electrical loom, it is probable that the person is suffering from
forgetfulness.
an inner ear infection.
a form of colour-blindness.
Engineer may feel uneasy in a tight and enclosed space. They may experience physical and psychological pressure. This is
an abnormal fear.
a normal fear.
classified as panic.
Licensed aircraft maintenance engineer suspected of having claustrophobia
is not allowed to work on an aircraft.
is allowed to work when he is accompanied by another engineer.
must undergo medical check-up.
An engineer working inside the fuel tank is suspected of having claustrophobia. What are the symptoms for claustrophobia?
Migraine, headache, or loss of visibility
panic and is afraid that he might not be able to get out from the fuel tank
Drowsiness, loss of concentration
It is common for people over the age of 40 years to need glasses when
reading the safety signs posted around the hangar.
reading technical maintenance manuals and checklists while working on aircraft.
seeing control tower signals when towing aircraft to the run-up area.
In a situation whereby your attention is divided as you are required to perform two tasks at the same time,
one task may not be done better than the other.
both tasks will be done equally well.
both tasks may not be completed on time.
If a person suffers from hypermetropia, his visual image is focused
in front of the retina.
on the retina.
behind the retina.
When an engineer is doing maintenance tasks on an aircraft, he should have good
near vision only.
both near and distance vision.
distance vision only.
Attention and perception are factors of "Human performance and Limitations". Which of the following is not related to human perception?
Existing knowledge and experience
The process of assembling sensations into a useable mental representation of the world
Focusing mental resources on specific elements
Which of the following is not an environmental factor that affects the performance of the eye?
amount of light available
clarity of the air
time of day
