Maintenance Quiz

730
Engineer working on the wing of a Cessna
image: Civil Aviation Safety Authority

1. Castellated nuts:

  1. are one-time use only and cannot be reused
  2. cannot be used in high-vibration applications
  3. allow a lower torque to be applied
  4. can be torqued to specific values

2. When a wet torque is specified in a maintenance document, it means:

  1. lubrication must be applied to the nut and threaded portion
  2. lubrication must be applied to the threaded portion only
  3. if lubrication is not applied, it may cause an under‑torque
  4. if lubrication is not applied, it may cause an over‑torque

3. The main reason for using cadmium-plated steel fasteners is they:

  1. have an attractive gold appearance
  2. are not brittle
  3. do not fail if over-torqued
  4. have anti-corrosive properties

4. Many light aircraft have tubular structures manufactured from 4130 steel:

  1. the number 4 indicates a carbon content of 0.40%
  2. the number 1 refers to the 10% chromium-molybdenum
  3. the number 30 refers to a carbon content of 0.30%
  4. the number 30 refers to the 30% chromium-molybdenum content

5. AD/GENERAL/87 Amdt 1 – Primary Flight Control Cable Terminals – Detailed Visual Inspections – requires (unless otherwise specified in this AD or the manufacturer’s maintenance schedule) the visual inspection of cable assemblies using swaged terminal fittings manufactured from SAE-AISI 303Se or SAE-AISI 304 stainless steel every:

  1. 15 years
  2. 12 years
  3. year if they have more than 15 years in service
  4. year if they have more than 12 years in service

6. Control cables can be made of galvanised steel or stainless steel:

  1. galvanised steel cables resist abrasion wear longer than stainless steel cables
  2. galvanised steel works better than stainless steel in saltwater applications
  3. stainless steel is harder than galvanised steel
  4. stainless steel cables cost less than galvanised steel cables

7. Maintenance may be carried out with reference to FAA AC 43.13-2B if:

  1. the aircraft is pressurised
  2. the aircraft is above 5700 kg MTOW
  3. the manufacturer allows the reference to AC 43.13-2B
  4. the manufacturer allows the reference to AC 43.13-2B and the aircraft logbook statement has an entry to that effect

8. Aircraft hardware contains a selection of various types of nuts including nylock nuts:

  1. nylock nuts use the nylon insert to grip the end of the fastener
  2. only red-coloured insert nylock nuts are approved for aircraft use
  3. nylock nuts are always manufactured from cadmium-plated steel
  4. nylock nuts may be loosened by aircraft vibration

9. Markings on the heads of aircraft rivets are used to classify their characteristics. A rivet made from carbon steel has the following marking on the head:

  1. recessed dot
  2. raised dot
  3. recessed triangle
  4. recessed dash

10. On light turbofan engines such as the Honeywell 731 series, the engine is deemed serviceable:

  1. if the charted fan speed of the day is reached before the interstage turbine temperature (ITT) red line
  2. if the charted fan speed of the day that is reached is 5% over the ITT red line
  3. the ITT is insignificant so long as the charted fan speed is reached
  4. the charted fan speed is insignificant as long as the ITT red line is not exceeded

11. On a KingAir200, the starter switch has two positions, start and motor:

  1. in the motor position, the starter generator turns the engine and the pilot selects the ignition separately
  2. in the start position, the starter generator turns the engine and ignition is provided to the ignitors to start combustion
  3. in the start position, ignition will remain continuous for up to 10 seconds
  4. in the motor position, the starter generator turns the engine and switches off automatically

12. If an aircraft is inadvertently submerged in water:

  1. it should be flushed only if it has been submerged in saltwater
  2. it doesn’t require flushing if a de-watering fluid is applied quickly
  3. it doesn’t require flushing if it is dried mechanically within 24 hours
  4. it should be flushed if it has been submerged in saltwater or freshwater

13. Oxygen supply bottles require hydrostatic testing on a regular basis:

  1. hydrostatic testing ensures the integrity of the bottle by measuring fluid displacement under high pressure
  2. hydrostatic testing is not required if the bottle has been full of oxygen since its last hydrostatic test
  3. hydrostatic testing detects the presence of corrosion inside the bottle
  4. bottles that are regularly hydrostatically tested have an unlimited life

14. A different type of replacement battery may be fitted to an aircraft:

  1. providing it has the same capacity as the original
  2. providing it has the same form, fit and function as the original
  3. only if the replacement battery has an STC (or other form of approval) to install that battery in a particular aircraft
  4. only if the battery is the same technology as the original battery (i.e. lead acid for lead acid or nicad for nicad)

15. When weighing a general aviation aircraft:

  1. reservoirs containing fluids required for normal flight should be empty
  2. fuel tanks should be full
  3. the aircraft should have all wheels on level ground
  4. the flight manual (if applicable) should be included in the weight and listed on the equipment list

 

Answers:

  1. (c)
  2. (a)
  3. (d)
  4. (c)
  5. (c)
  6. (a)
  7. (d)
  8. (a)
  9. (c)
  10. (a)
  11. (b)
  12. (d)
  13. (a)
  14. (c)
  15. (d)

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