Workshop Practices Flashcards
What does the Health and Safety at Work Act 1974 deal with?
Health, safety and welfare of people at work. Employers and employees responsibilities
Basic fundamentals of the Health and Safety at Work Act?
Employers responsibility to provide safe workplace, PPE, accident reports.
Employees responsibility to respect rules, wear PPE, report accidents
Maximum weight for someone to lift manually?
20kgs
Basic requirements for team lifting?
Everyone understands job involved
Area is clear
Weight evenly distributed
Person in charge not involved in lifting, observing for safety, etc
Function of Barrier Cream?
Prevents oils and fuel drying out skin, dermatitis
What are the reactions of the body when subjected to a 100V shock?
- 001 Amp - Sensation
- 012 Amp - Muscular contraction
- 1 Amp - Death
Treat someone for electric shock?
Remove victim from supply using insulated material e.g rubber gloves
Treat for shock, keep them warm
Get medical assistance
Under what conditions should electrical equipment never be handled?
If it is unserviceable (damaged) or dangerous to do so
Hazards of Compressed Gases?
Embolism
Spontaneous combustion when in contact with oil or grease
Oxygen intensifies a fire
Static electricity can cause a spark
Checks before using compressed air and air hoses?
No horseplay Disconnect when not in use Replacing drill bits Eye protection Good serviceability Protective caps fitted to cylinders
How are leak tests performed on oxygen systems?
Approved solutions
Bubbles
What is COSHH?
Control Of Substances Hazardous to Health
Employer
What is MSDS?
Material Safety Data Sheet
Employer
What are Risk Assessments?
Checks for hazards and risks
Carried out by qualified assessor
How can Dermatitis be prevented?
Barrier creams
Gloves
Remove oil or fuel soaked clothes
What must be done before carrying out work in fuel tanks?
Tanks completely emptied Vented/purged Explosiometer check Safety man Alternating turns
What classifications of fires are there?
Class A - wood, paper Class B - petrol, oils Class C - flammable gases Class D - metals Class F - cooking oils and fats Electrical fires
What extinguisher is suitable for what type of fire?
Water - class A
Carbon Dioxide - class B and electrical
Dry Powder - class B, C and D
Halon Class - B and C
Aqueous Film Forming Foam - class A and B - spills
Film Forming Foam Fluroprotein - better for deep pools
What does AFFF stand for?
Aqueous Film Forming Foam
What does FFFP stand for?
Film Forming Foam Fluroprotein
Good tool control?
Tagging
Shadow boards
Barcodes
Actions on an aircraft/engine fire?
Shut down all systems Call emergency services Remove all equipment from area Assist fire service Recover aircraft Report to AAIB within 72 hours
What is FOD?
How to prevent it?
Anything that could get sucked into the engine
Constant FOD checks carried out
What is Tool Husbandry?
Keep them serviceable - lubrication
Inspection
Organised
Damaged tools to be discarded
What quality of work should you strive for?
The highest quality
What pressure is an aircraft engineer usually under?
High pressure
Time
Possibly distracted - personal problems
How should long tubes or bars be stored?
Vertically to prevent bowing
Under what conditions should aircraft materials be stored?
In suitable conditions specified in SRM
What is the minimum material and component identification requirements?
Part number
Batch number
Certificate of conformity
What systems of measurement are used today in aviation?
Imperial and metric
What is general tolerance?
Usually given for all dimensions on a drawing and is stated in a printed box on the drawing
How are individual tolerances expressed?
When the general tolerance is not appropriate, an individual tolerance is given. Individual tolerance of one part rather than general tolerance of whole drawing
What is Nominal Dimension?
The exact dimension required in the design
What is Tolerance?
An allowable manufacturing deviation from the Nominal Dimension
What is Allowance?
A planned deviation form from the nominal or theoretical dimension.
The degree of allowance will give the type of fit for the two items i.e clearance fit, interference fit
What are the difference between Mega and Micro?
Kilo and Milli?
Mega - 1x10^6
Micro - 1x10^-6
Kilo - 1x10^3
Milli - 1x10^-3
What is a nautical mile?
Based on 1/60 of one degree of the earth’s circumference at the equator. Approx 6080 ft
How many inches in a metre?
39.37
How do you convert inches to millimetres?
Vice Versa?
Multiply by 25.4
Divide by 25.4
What is a Parallax Error?
Eye not at the correct angle. When taking measurements with a scale, it should be held so that the graduation lines are as close as possible to the face.
What are Feeler gauges?
Used for?
Made up of a number of thin steel leaves that fold into a handle like a pocket knife. These leaves can be inserted into a gap to measure the size. Can use 3 or 4 together
What is a ball gauge?
Used for?
Devices fitted into a hole and adjusted to fit the hole snuggly. Gauge is then removed and diameter is measured to determine hole’s size
What are the rules for “Marking Out?”
Never use lead pencil on titanium - cause cracking
Soft lead pencil on aluminium
Mark only once, only thin lines
Scriber markers only used for scribe lines, remove lines after
What is a combination set?
Used for?
Ruler, protractor, centre head
Used for measuring straight lines and angles
