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Ground ops human factors practice questions

18 questions from the aviation mechanic general practice test.

Ground ops human factors practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

Which extinguisher is suitable for a fire in energized electrical equipment?

  1. Carbon dioxide
  2. Plain water
  3. Water-based foam
  4. Soda-acid
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A. Carbon dioxide

Carbon dioxide does not conduct electricity and leaves no residue, so it suits Class C fires. Water and water-based agents conduct current and put the operator at risk of shock.

Reference: FAA-H-8083-30, Safety, Ground Operations and Servicing (fire protection; extinguishing agents)

What must be done before the fuel cap is removed for overwing fueling?

  1. Turn on the aircraft battery
  2. Bond the nozzle to the aircraft
  3. Start the auxiliary power unit
  4. Disconnect the ground cable
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B. Bond the nozzle to the aircraft

Fuel moving through a hose builds a static charge, so the truck, aircraft and nozzle are bonded before the tank is opened to prevent a spark at the filler. Electrical power is kept off as far as practical during fueling.

Reference: FAA-H-8083-30, Safety, Ground Operations and Servicing (fueling procedures)

What must be kept away from oxygen servicing equipment and fittings?

  1. Dry nitrogen
  2. Clean water
  3. Oil and grease
  4. Teflon tape
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C. Oil and grease

Petroleum products can ignite spontaneously in contact with high-pressure oxygen, so hands, tools and fittings must be free of oil and grease. Only approved oxygen-compatible thread sealants and leak-test solutions are used.

Reference: FAA-H-8083-30, Safety, Ground Operations and Servicing (oxygen servicing)

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