7.1.4 Safe Working Practices

Question 1

What should you never do when handling electrical equipment?

Answer 1

Never handle or operate electrical equipment with wet hands or feet, or in a wet area.

Question 2

What type of tools should be used when working on aircraft?

Answer 2

Pneumatic tools are preferable whenever they are available.

Question 3

What should you avoid with electrical wires and cables?

Answer 3

Do not allow electrical wires and cables to dangle over sharp edges.

Question 4

What should you check for on electrical cables?

Answer 4

Always ensure that electrical cables are not frayed and that they have undamaged insulation.

Question 5

What should you never do with electrical wires?

Answer 5

Never trail electrical wires through oil, water, or other liquids.

Question 6

What is required for electrical equipment?

Answer 6

All equipment should have a suitable plug fitted and be either earthed, or where necessary, double insulated.

Question 7

How often should electrical equipment be checked?

Answer 7

Electrical equipment needs to be checked regularly, and a serviceable label should be attached, with the most recent test date appended.

Question 8

What type of electrical equipment should be used in hazardous areas?

Answer 8

Only use approved and specially designed explosion proof electrical equipment in hazardous areas, such as fuel tanks.

Question 9

What are the potential effects of electric shock?

Answer 9

The passage of electric current can cause muscular contractions, respiratory failure, fibrillation of the heart, cardiac arrest, or injury from internal burns.

Question 10

What factors affect the severity of electric shock injuries?

Answer 10

The nature and severity of injury depends upon the magnitude, duration, and path of the current through the body.

Question 11

What must be done before working on aircraft electrical systems?

Answer 11

Ensure that external electrical power has been switched off.

Question 12

What should be done with the aircraft battery before working on electrical systems?

Answer 12

Disconnect the aircraft battery.

Question 13

What should be placed at external power receptacles of the aircraft?

Answer 13

Place warning signs advising personnel not to apply power.

Question 14

What should be done with circuit breakers before work?

Answer 14

Pull and tag all relevant circuit breakers prior to work and ensure they are reset afterwards.

Question 15

What should be checked before applying power to aircraft systems?

Answer 15

Ensure all switches are in the correct position for the system they relate to.

Question 16

What hazards do compressed gases present?

Answer 16

Compressed gases provide a number of potential dangers to personnel and must always be treated with extreme caution.

Question 17

What must be done before charging an aircraft system with a compressed gas?

Answer 17

Purge the hose on the gas bottles to discharge contaminants to the atmosphere.

Question 18

How should pressure be increased when charging aircraft systems?

Answer 18

Increase the pressure in slow increments to ensure that the gas does not become hot.

Question 19

What should be checked on pressure gauges?

Answer 19

Always check that pressure gauges are within their calibration date.

Question 20

What is the typical operating pressure for compressed air in workshops?

Answer 20

Compressed air is generally supplied at an operating pressure of approximately 80 psi.

Question 21

What can happen if compressed air is directed at people?

Answer 21

Foreign objects can be injected and lodged under the skin, or flying particles can cut or bruise the body.

Question 22

What can happen if compressed air is blown into the eyes?

Answer 22

Foreign particles blown into eyes can cause eye injuries that can lead to a loss of sight.

Question 23

What can injecting an air bubble into the bloodstream cause?

Answer 23

It can lead to a fatal embolism.

Question 24

What can happen if air is blown into the mouth?

Answer 24

It can rupture the oesophagus or the lungs.

Question 25

What should never be done with compressed air tools?

Answer 25

Never point compressed air tools at people.

Question 26

What personal protective equipment (PPE) should be worn when using compressed air?

Answer 26

Always wear proper PPE, including safety glasses, face shields, and hearing protection.

Question 27

What must be done with compressed air supplies when not in use?

Answer 27

Always disconnect compressed air supplies when not in use.

Question 28

What should be done before replacing components on a power tool?

Answer 28

Always disconnect the compressed air supply to a power tool before replacing expendable components.

Question 29

What is a major hazard associated with oxygen?

Answer 29

Oxygen can cause fire and explosion if misused.

Question 30

What should be avoided to prevent fire when working with oxygen?

Answer 30

Avoid oxygen coming into contact with oils and greases.

Question 31

What type of tools should be used on oxygen systems?

Answer 31

Only oxygen-specific tools should be used on oxygen systems.

Question 32

What should be used for lubricating tools on oxygen systems?

Answer 32

Only approved lubricants, such as Perfluorinated Polyether (PFPE) lubricants, should be used.

Question 33

What must be done before charging breathing oxygen systems?

Answer 33

The oxygen must be inhaled to ensure it is not contaminated.

Question 34

What must all oils and chemicals have?

Answer 34

All oils and chemicals are to have MSDS or SDSs that contain information for safe handling.

Question 35

What does the GHS safety data sheet include?

Answer 35

The GHS safety data sheet is a 16-section document that includes identification, hazard identification, and first-aid measures, among others.

Question 36

What is a major threat during aircraft fuelling?

Answer 36

The main threat is the risk of fire.

Question 37

What must be avoided to prevent static discharge during fuelling?

Answer 37

Static discharge in the form of a spark must be avoided at all times.

Question 38

What defines confined space working?

Answer 38

Any enclosed space with a risk of death or serious injury from hazardous substances or dangerous conditions.

Question 39

What dangers can arise in confined spaces?

Answer 39

Dangers include lack of oxygen, poisonous gas, fire and explosions, and hot conditions.

Question 40

What must be done if entry into a confined space cannot be avoided?

Answer 40

Ensure that a safe system is available to work inside the space, and monitor the environment for safety.