module 9 Human Factors

Information, if not rehearsed is lost in a) 10 - 20 seconds b) 1 minute c) 30 - 40 seconds

a) 10 - 20 seconds

Ultra short term memory has a duration of about a) 2 seconds b) 10 to 20 seconds c) 80 - 100 milliseconds

a) 2 seconds

From what age does hearing ability normally begin to decline? a) 30 b) 40 c) 50

a) 30

Presbyopia often effects the eyes of people after the age of a) 40 b) 55 c) 70

a) 40

The amount of light which is allowed to enter the eye can vary by a factor of a) 5:1 b) 50:1 c) 500:1

a) 5:1

When a person moves from a well lit area to a poorly lit area, what is the minimum time they should allow for the eyes to adapt? a) 7 minutes b) 7 seconds c) 30 seconds

a) 7 minutes

In AWN 47, what is the standard hearing test? a) The ability to hear a conversation in a quiet room at 2 metres b) The ability to hear a conversation in a quiet room at 10 metres c) The ability to hear a conversation in a noisy room at 2 metres

a) The ability to hear a conversation in a quiet room at 2 metres

What do you do when someone is hypothermic? a) Warm them up b) Give them a drink because of dehydration c) Feed them sweet things because of their diabetes

a) Warm them up

Alertness and performance is reduced when the body temperature is a) below normal b) above normal c) either above or below normal

a) below normal

The only permitted stimulant is a) caffeine b) bromine c) amphetamine

a) caffeine

Large amounts of caffeine can a) cause anxiety, headaches and stress b) improve alertness and increase awareness c) reduce anxiety and stress

a) cause anxiety, headaches and stress

Long shift work a) decreases the ability to recognize defects b) increases the ability to recognize defects c) has no effect on the ability to recognize defects

a) decreases the ability to recognize defects

When working with bright lights consideration should be given to a) glare b) shadows c) blurred image

a) glare

What range of sound is usually impaired first with the onset of presbycusis a) high pitch sound b) mid range sound c) low pitch sound

a) high pitch sound

Consumption of alcohol a) increases mental and physical reaction times b) decreases mental and physical reaction times c) has no affect upon mental and physical reaction times

a) increases mental and physical reaction times

Visual inspection by an 'experienced' maintenance engineer is a) knowledge and rule base behaviour b) skill and knowledge based behaviour c) skill and rule based behaviour

a) knowledge and rule base behaviour

Hypermetropia is the medical name for a) long sightedness b) short sightedness c) deafness

a) long sightedness

A person with low self-esteem is a) more likely to conform to peer pressure b) less likely to conform to peer pressure c) Conformity to peer pressure is not affected by level of self-esteem

a) more likely to conform to peer pressure

The first stage in information processing is Ans a) perception b) memorizing c) decision

a) perception

The first stage in information processing is a) perception b) memorizing c) decision

a) perception

The "cocktail party effect" is descriptive of a) selective attention b) divided attention c) focused attention

a) selective attention

Iconic memory a) stores visual information and lasts up to 1/2 second b) stores sounds and lasts up to 2 seconds c) stores visual information and lasts up to 2 seconds

a) stores visual information and lasts up to 1/2 second

The symptoms of de-motivation are very similar to the symptoms of a) stress b) tiredness c) mental illness

a) stress

'Asynchronous' communication includes a) technical manuals, memos, Advisory Circulars and Airworthiness Directives b) face-to-face communications c) immediate voice communication by radio link

a) technical manuals, memos, Advisory Circulars and Airworthiness Directives

In the UK, an airside ramp vehicle driver is most likely to go deaf in a) the right ear b) the left ear c) both ears

a) the right ear

'Confirmation bias' is a) the subconscious attention to evidence which confirms an engineer's beliefs, and inattention to evidence which contradicts his beliefs b) An inspection of work carried out by an independent inspector or supervisor c) Error in work carried out by a supervisor who has also inspected and signed for his own work

a) the subconscious attention to evidence which confirms an engineer's beliefs, and inattention to evidence which contradicts his beliefs

Motivation is a) the thing that drives someone to do something b) a reward or punishment designed to reduce errors c) a reward or punishment designed to increase work rate

a) the thing that drives someone to do something

The best type of handover is a) the use of handover logs and a brief by the shift supervisor b) when each individual gets a personal handover of the job c) when written instructions are given by the engineer finishing his shift to the engineer just beginning a shift.

a) the use of handover logs and a brief by the shift supervisor

on a task that is complex, an engineer uses his own procedures due to pressure. This is legally termed a) violation b) initiative c) modification

a) violation

An important point in machine safety is to a. ensure you Know how to stop a machine before you start it b. check the oil level at the end of each operation c. ensure feed mechanisms are engaged before starting

a. ensure you Know how to stop a machine before you start it

In the UK, the normal approach to a helicopter is made a. on the advancing blade side within sight of the aircrew b. at a 45° angle from either side c. directly from ahead in full view of the aircrew

a. on the advancing blade side within sight of the aircrew

Grease and oils used in aircraft systems must not be allowed to come into contact with a. oxygen b. nitrogen c. carbon dioxide

a. oxygen

Up to what proximity to an aircraft with engines running is the use of ear protection recommended for maintenance personnel? a) 20 - 30 metres b) 200 - 300 metres c) 2 - 3 metres

b) 200 - 300 metres

Finding that familiar tasks (such as programming the video recorder) seems more complicated than usual, could be an early indication of a) Acute stress b) Chronic fatigue c) A cold or flu

b) Chronic fatigue

Which type of human error is easiest to correct? a) Variable error b) Constant error c) Reversible error

b) Constant error

A person with 20/40 vision has a) Better eyesight than a person with 20/20 vision b) Worse eyesight as a person with 20/20 vision c) the same eyesight as a person with 20/20 vision

b) Worse eyesight as a person with 20/20 vision

A good team is one where every member has a) an opinion b) an input c) a job

b) an input

Cycles of sleep repeat a) approximately each 4 hours b) approximately each 90 minutes c) approximately 20 minutes

b) approximately each 90 minutes

If an image formed on the retina of the eye is inverted relative to the viewers normal perception of the image, the viewer will a) become disoriented and dizzy b) behave and feel normal c) consciously mentally revert the image so as to make sense of his/her surroundings

b) behave and feel normal

Circadian Rhythms control a) urine output b) body temperature c) sleeping patterns

b) body temperature

'Environmental capture' is a type of error possible when an engineer does the same job repeatedly a) on the same type of aircraft b) but on different types of aircraft c) in a short timescale

b) but on different types of aircraft

A stimulant allowed to be taken without a doctor's prescription is a) bromine b) caffeine c) antihistamine

b) caffeine

The effect on an engineer of environmental noise is a) it improves concentration and quality of work b) it decreases concentration and quality of work c) it has no affect on concentration of quality of work

b) it decreases concentration and quality of work

In the 'slips, lapses and mistakes' definition of errors, forgetting to replace an engine cowling would be considered a a) slip b) lapse c) mistake

b) lapse

Excess noise in a working environment can a) not affect performance b) lower resistance to other stresses c) raise resistance to other stresses

b) lower resistance to other stresses

People with colour defective vision usually have difficulty differentiating between a) blue and yellow b) red and green c) blue and green

b) red and green

At lower light levels, the visual sensing is performed mainly by the a) cones b) rods c) fovea

b) rods

The "working memory" is a) ultra short term memory b) short term memory c) long term memory

b) short term memory

Sleeping tablets can a) help REM sleep and realign circadian rhythms b) slow reaction time and dull the senses c) increase alertness after waking the following morning

b) slow reaction time and dull the senses

The eyesight of an engineer is the responsibility of a) the optician b) the engineer c) the Quality Manager

b) the engineer

Rubber gauntlets must be worn when handling a. very hot components b. acids or alkaline c. very cold components

b. acids or alkaline

FOD is defined as a. first opportunity decision b. foreign object damage c. fiber optic display

b. foreign object damage

When handling sheet metal ensure a. safety shoes are worn b. proper protective gloves are worn c. safety goggles are worn

b. proper protective gloves are worn

Information in the motor memory not rehearsed will be lost is a) 1 - 3 months b) 2 - 3 weeks c) 10 - 20 seconds

c) 10 - 20 seconds

What effect would the consumption of 3 - 5 units of alcohol? a) Loss of quality of sleep b) Low REM sleep c) A drop in body temperature

c) A drop in body temperature

Information for certifying staff when medically unfit is found in a) ANO b) AWN 3 c) AWN 47

c) AWN 47

Studies have shown that working outside in a temperature of 55oF will have what effect on hand dexterity? a) None b) Very slight c) Around 50%

c) Around 50%

Studies have shown that working outside in a temperature of 55oF will have what effect on hand dexterity? a) None b) Very slight c) Around 50%

c) Around 50%

In AWN 47 what is the recommended hearing test? a) The ability to hear an average conversation voice at a distance of 10 feet b) The ability to hear a certain noise at 8 feet c) The ability to hear an average conversation voice at a distance of 6 feet

c) The ability to hear an average conversation voice at a distance of 6 feet

Which of the following defines a peer pressure situation? a) Your girlfriend telling you to go out with her b) Your supervising manager pressuring you to complete the current task on time c) Your colleagues pressuring you to work faster so they can go home

c) Your colleagues pressuring you to work faster so they can go home

If a maintenance engineer has a cold or flu he should a) only absent himself from duty if his work contract includes sickness pay b) only absent himself from duty if there are no staff shortages at his workplace or within his work team c) absent himself from duty until fully recovered, regardless of other factors

c) absent himself from duty until fully recovered, regardless of other factors

For a person with normal Circadian rhythms, the body temperature will be lowest a) at midday b) upon waking c) between 4 and 6 o'clock in the morning

c) between 4 and 6 o'clock in the morning

AWN 47 states that the engineer a) is responsible for the work he has signed for b) is responsible for health and safety c) does not report for work if unfit

c) does not report for work if unfit

The incident where a 737 lost oil from both engines is a direct result of a) engine vibration b) human factors c) human error

c) human error

The symptoms of stress are a) indications of improved work performance b) violence, sickness, absence from work, drug and alcohol abuse c) irritability, forgetfulness, sickness, absence from work, drug and alcohol abuse

c) irritability, forgetfulness, sickness, absence from work, drug and alcohol abuse

A good rule of thumb for an adequate amount of sleep is a) two hours of high quality sleep is good for one hour of activity b) one hour of high quality sleep is good for one hour of activity c) one hour of high quality sleep is good for two hours of activity

c) one hour of high quality sleep is good for two hours of activity

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 a) culture issues b) esteem needs c) peer pressure

c) peer pressure

In the 'slips, lapses and mistakes' definition of errors, a mistake would typically occur at the a) execution stage b) storage (memory) stage c) planning stage

c) planning stage

The inability for the eyes to accommodate sufficiently is known as a) myopia b) hypermetropia c) presbyopia

c) presbyopia

Peer pressure is a) typified by the expression "the way we do it around here" b) the perceived pressure to carry out a task in the same way your colleagues would c) the perceived pressure to conform to what you believe your colleagues expect of you.

c) the perceived pressure to conform to what you believe your colleagues expect of you.

Peer pressure is a) typified by the expression "the way we do it around here" b) the perceived pressure to carry out a task in the same way your colleagues would c) the perceived pressure to conform to what you believe your colleagues expect of you.

c) the perceived pressure to conform to what you believe your colleagues expect of you.

Long term memory capacity is usually a) 4 - 8 years b) 12 months c) unlimited

c) unlimited

The most effective form of communication is a) written communication b) explicit communication c) verbal communication

c) verbal communication

The conditions laid down in AWN 47 are applicable to aircraft engineers a) who sign for work completed b) for their safety at work c) when under the influence of drink or drugs

c) when under the influence of drink or drugs

If a 737 had both engines serviced and lost oil from both engines in flight, this a) can be considered an acceptable probability b) can be expected to happen statistically due to the number of aircraft in service c) would be a direct result of human error

c) would be a direct result of human error

The suction area around a typical medium size twin jet gas turbine engine intake when the aircraft is at ground idle is at a radius of a. 15 feet b. 12 feet c. 9 feet

c. 9 feet

When working with oils or greases ensure your hands are protected with barrier cream. On completion hands must be washed using a. an approved solvent b. a good proprietary abrasive powder c. a approved cleaning gel

c. a approved cleaning gel

Break in markings for aircraft are identified by a. black and yellow diagonal stripes b. a red triangle with 'break in' printed in black c. a broken coloured line defining the break-in area

c. a broken coloured line defining the break-in area

If a tool is lost and cannot be readily found on an aircraft a. inform the stores department to order a new item b. make a note to keep a look out for it later c. report the fact to a supervisor or foreman

c. report the fact to a supervisor or foreman

Colour defective vision affects a) almost 1 in 10 of men b) almost 1 in 10 of women c) more women than men

a) almost 1 in 10 of men

Alertness and performance is reduced when the body temperature is a) below normal b) above normal c) either above or below normal

a) below normal

Which of the following is true? a) Noise does not affect a person's standard of work b) Noise does affect the standard of work with certain people c) Noise affects the standard of work proportionately with the level of the noise

b) Noise does affect the standard of work with certain people

The memory can be aided by a) memory checking b) mind logging c) a checklist

c) a checklist

An effective group work is when a) everyone discusses ideas and opinions b) everyone has a job to do c) everyone contributes in some way

c) everyone contributes in some way

Leather aprons are designed to protect against a. acids b. alkaline c. heat

c. heat