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'.