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WorksheetsM9.5 Cat B
Total questions: 20
Worksheet time: 10mins
Environmental stresses are
caused by noise, fumes, heat and vibration
tolerated by everyone equally
not normally cumulative
Employers must provide their employees with personal ear protectors if the noise level reaches
70 dB
85 dB
60 dB
The maximum allowable noise dose is
85 dB
any combination of noise and time which exceeds 90 dB TWA
90 dB for 24 hours
Environmental capture' is a type of error possible when an engineer does the same job repeatedly
but on different types of aircraft
on the same type of aircraft
in a short timescale
In the UK, an air-side ramp vehicle driver is most likely to go deaf in
the left ear
both ears
the right ear
Up to what proximity to an aircraft with engines running is the use of ear protection recommended for maintenance personnel?
200 - 300 metres
20 - 30 metres
2 - 3 metres
Studies have shown that working outside in a temperature of 55°F will have what effect on hand dexterity?
Around 50%
Very slight
None
When working with bright lights consideration should be given to
blurred image
shadows
glare
Which of the following is true?
Noise affects the standard of work proportionately with the level of the noise
Noise does not affect a person's standard of work
Noise does affect the standard of work with certain people
The effect on an engineer of environmental noise is
it improves concentration and quality of work
it decreases concentration and quality of work
it has no affect on concentration of quality of work
Excess noise in a working environment can
raise resistance to other stresses
not affect performance
lower resistance to other stresses
If the temperature is - 15°C and you are working on the line, you should
rotate engineers regularly and have a supervisor keep an eye on them
carry on regardless of the weather to keep the aircraft flying
stop all maintenance until the weather improves
Cold stress can be influenced by
insufficient vitamins in the diet
a drop in body temperature
the wind chill factor
Environmental stresses in an extreme high temperature and noisy environment causes
attention to be disturbed and distributed
no loss of attention or distraction
total loss of attention
Which of the following environments is best suited to aircraft maintenance?
Working outside, at night, in the rain
Working outside, in the direct midday sun
Working inside in a well lit, comfortable hangar
Intense or loud noise may lead to
deafness
fatigue
no effects
Facility lighting in a hangar should be
no brighter than 10 lux
provided by fixed light units giving light to shadow ratio of 3:1
portable so that individual tasks may be well lit
When tasks are being designed, the maximum mass an engineer should lift is
32 kg
23 kg
50 kg
Sensing and perception errors are most likely to result from
distraction of other engineers
poor lighting or noise
lack of adequate training
Task lighting in a hangar is mainly
provided by fixed lighting
provided by fluorescent tubes
portable so that individual tasks may be well lit
