Maintenance Procedure final

1. During servicing of a lead acid battery, you notice that it has a low electrolyte level. What should you add to the battery to top up the electrolyte level?

A) Boric acid

B) Sulfuric acid

C) Distilled water

D) Tap water

2. What is used to neutralize a spilled electrolyte from a lead acid battery?

A) Boric acid

B) Baking soda

C) Water

D) Sulfuric Acid

3. What electrolyte is used in lead acid batteries?

A) Distilled water

B) Sulfuric acid

C) Potassium hydroxide

D) Boric acid

4. When servicing lead acid batteries, what precautions must be taken?

A) Wear PPE

B) Remove metal jewelry

C) All of the above

D) Ensure neutralizing agent is available

5. What is used to measure the specific gravity of a lead acid battery cell?

A) Anemometer

B) Barometer

C) Hydrometer

D) Thermometer

6. What electrolyte is used in NiCad batteries?

A) Sulfuric acid

B) Boric acid

C) Sodium bicarbonate

D) Potassium hydroxide

7. What is a benefit of NiCad batteries compared to Lead Acid Batteries?

A) NiCad batteries are not susceptible to thermal runaway

B) NiCad electrolyte is less corrosive & dangerous than Lead Acid electrolyte

C) NiCad batteries require fewer cells for the same voltage

D) NiCad batteries maintain an almost constant voltage throughout discharge

8. What happens to the specific gravity of a NiCad cell during discharge?

A) Increases

B) Drops to zero

C) Remains constant

D) Decreases

9. What is the required next step if a NiCad battery fails its capacity check?

A) Deep cycle

B) Tag serviceable & place on shelf

C) Recharge

D) Tag unserviceable & scrap

10. What is used to neutralize spilled electrolyte from a NiCad battery?

A) Water

B) Baking soda

C) Potassium hydroxide

D) Boric acid

11. How is the speed of the compressor controlled in a turbocharger system?

A) By controlling the flow of exhaust gases out of the turbine

B) By controlling the flow of filtered air into the compressor

C) By controlling the flow of exhaust gases out of the compressor

D) By controlling the flow of exhaust gases into the turbine

12. What is the compressor discharge pressure of a turbocharger also called?

A) Exhaust gas pressure

B) Upper deck pressure

C) Manifold pressure

D) Exhaust back pressure

13. What is used to turn the compressor of a turbocharger?

A) Intake gasses passing through a turbine will turn the compressor

B) The compressor will be turned by the propeller gearbox

C) Exhaust gasses passing through a turbine will turn the compressor

D) The compressor will be turned by the crankshaft

14. What is the purpose of a sea level boosted engine?

A) To maintain sea level performance below sea level

B) To maintain sea level performance up to the aircraft’s service ceiling

C) To maintain sea level performance up to the critical altitude

D) To maintain sea level performance above the critical altitude

15. What is often used to protect the engine from excessive turbocharger “boost”?

A) A back-pressure sensing thermal compensating negative relief bypass vale

B) A bypass valve which will redirect some of the turbochargers exhaust air back into the inlet

C) A bypass valve which will redirect some of the turbochargers output air back into the inlet

D) A pressure relief valve, set 1.5 – 2” of Hg above max specified boot

16. When does the density controller control the turbocharger?

A) At all throttle settings

B) At full throttle

C) It does not, that is the job of the differential pressure controller

D) At idle

17. What will happen to the performance of a sea level boosted engine once it is above it’s critical altitude?

A) Performance (horsepower) will drop

B) Performance (horsepower) will rise

C) Nothing

D) The engine will overspeed and overheat

18. What is the source of “muscle” pressure that drives the wastegate actuator towards the closed position?

A) Ful pressure from the EDP

B) Hydraulic pressure

C) Turbocharger compressor discharge pressure

D) Oil pressure from the EDP

19. Where will the exhaust gasses enter a turbocharger?

A) Through the circular plenum around the outside of the compressor

B) Through the center of the compressor

C) Through the circular plenum around the outside of the turbine

D) Through the center of the turbine

20. Which of the following is NOT a use for a turbocharger on an aircraft piston engine?

A) To create a pressure source to drive instruments and the de-ice systems

B) To increase sea level horsepower

C) To provide air for cabin pressurization

D) To maintain sea level horsepower to a critical altitude

21. Which statement is true concerning basic empty weight?

A) Includes full engine oil

B) Includes full usable fuel

C) Includes only full lavatory fluid and potable water

D) Does not include optional equipment, hydraulic fluid or paint

22. Which of the following describes useful load?

A) Maximum takeoff weight minus fuel used during flight

B) Maximum takeoff weight minus basic empty weight

C) Another name for payload

D) Basic empty weight plus usable fuel

23. How is net weight calculated for an aircraft?

A) Scale weight plus tare weight

B) Basic empty weight minus special and optional equipment

C) Scale weight minus tare weight

D) Basic empty weight + payload

24. An aircraft component is located at FS 112, WL 24. Where would this place the component?

A) 112 inches aft of the datum, 24 inches outboard of the fuselage center line

B) 112 inches aft of the datum, 24 inches above the fuselage center line

C) 112 inches forward of the datum, 24 inches below the fuselage center line

D) 112 inches above the datum, 24 inches outboard of the fuselage center line

25. How is aircraft basic empty weight determined?

A) Maximum takeoff weight minus fuel used during the flight

B) Net weight plus unusable fuel

C) Scale weight plus tare weight

D) Scale weight minus tare weight

26. Which of the following is included as part of the aircraft payload?

A) Flight crew

B) Unusable fuel

C) Fixed ballast

D) Optional equipment

27. Choose the statement that describes the datum from the following?

A) Fuselage station (FS) 0.0

B) Butt line (BL) 0.0

C) An imaginary reference line used to identify wing stations (ex. WS 134 is 134 inches outboard of the datum)

D) An imaginary line down the center line of the aircraft, established by the manufacturer, used exclusively for weight and balance computations

28. An aircraft type certificate data sheet provides the licensed empty weight of an aircraft. What action would the Aircraft Maintenance Engineer take when weighing the aircraft?

A) Mathematically remove the engine oil after weighing

B) Drain all operating fluids

C) Service all operating fluids (i.e., engine oil, hydraulic fluid, lavatory fluid, potable water; etc.) to full

D) Remove all special and optional equipment

29. What are the consequences of an aircraft operating with a center of gravity that is too far forward?

A) Lower stall speed

B) Improved pitch stability

C) Longer takeoff distance

D) Better spin characteristics

30. An aircraft type certificate data sheet identifies that the empty weight center of gravity (EWCG) range is between FS 47 and FS 53, an Aircraft Maintenance Engineer establishes that the actual EWCG is located at FS 47.2. Which of the following statement is correct?

A) Ballast is required at the nose of the aircraft

B) Ballast is required in the tail of the aircraft

C) The aircraft center of gravity will always be between the forward and after C o G range limits for all legal loading conditions

D) The aircraft must be reweighted at every annual inspection to ensure that the EWCG is still within range

31. Which equation would you apply to the illustrated aircraft (top of diagram) for weight and balance calculations?

32. What is the basic empty weight of the aircraft illustrated in the figure (aircraft fuel has been drained)? Note: Complete this in conjunction with the question asking about the empty weight center of gravity, as it is the same exercise

A) 2,554 lbs

B) 2,538 in.lbs

C) 2,553 lbs

D) 2,538 lbs

33. Choose the method that would normally be used to correct for a nose high condition during aircraft leveling

A) Release air from the nose wheel tire

B) Raise the nose gear jack

C) Lower the main jacks

D) Release air from the main gear oleo struts

34. What procedure is commonly accomplished if an aircraft’s center of gravity is not within its allowable C of G range?

A) Ballast can be added to shift it back into its desired range

B) Weight restrictions must be applied

C) Nothing is required, as this is a normal flight condition

D) Special loading charts are required prior to each flight

35. Which statement is true when preparing to weigh an aircraft?

A) All aircraft fluids must be drained (fuel, engine oil, hydraulics, etc.)

B) The aircraft brakes must be applied to prevent side loads on the scales

C) The aircraft must be leveled to simulate normal flight attitude

D) The illustrated parts catalogue (IPC) must be referenced to ensure that all required equipment is on board prior to weighing

36. What is the primary advantage of using electronic load cells over mechanical platform scales?

A) Load cells never require calibration

B) Tare weight is not required for the weighing procedure

C) Unusable fuel calculations are not required

D) The aircraft does not have to be placed on jacks, this saving considerable time

37. What is the empty weight center of gravity of the aircraft shown (aircraft fuel has been drained)? Note: Complete this in conjunction with the question asking about the basic empty weight, as it is the same exercise

A) 50.6 inches

B) 50.8 inches

C) Minus 50.6 inches

D) 51 inches

38. What is the center of gravity location, referenced to the datum for the illustrated lever?

A) +7 inches

B) -6 feet

C) -84 inches

D) +84 inches

39. When does a small aircraft need to be reweighed (after initial certification)?

A) When the weight and balance records have been lost

B) When substantial dirt has accumulated on the aircraft

C) Every five years

D) At every annual or 100-hour inspection

40. What is the term used to describe the product of a weight x its arm when applied to a lever?

A) Moment

B) Tare weight

C) Basic empty weight

D) Net weight

41. According to the chart, what is the approximate maximum gross weight of the aircraft?

A) 6,800 lbs

B) 6,550 lbs

C) 6,725 lbs

D) 6,400 lbs

42. What is the port side (left side) lateral C of G range limit for a longitudinal C of G at FS 248 (see the illustration)?

A) BL minus 1

B) BL 1.5

C) BL minus 2

D) BL 2.4

43. The flight crew of a large transport category aircraft have found that the center of gravity is aft of the operating range after loading. What would they do to remedy this condition?

A) Transfer baggage from the aft cargo compartment to the forward compartment

B) Install permanent ballast in the nose section of the aircraft

C) Trim the ailerons to compensate for this condition

D) Shift passengers from the front to the aft section of the aircraft

44. With reference to the accompanying chart, what is aft C of G range limit for a helicopter weight of 6,250 pounds?

A) FS 245.9

B) FS 245

C) FS 256

D) FS 255.1

45. Referencing the chart, what is the forward C of G range limit if the aircraft weighs 6,400 pounds?

A) 133 inches

B) 139.2 inches

C) 134 inches

D) 132 inches

46. How much ballast is required at the back of the illustrated aircraft to move the C of G aft from the current location at FS 37.5 to FS 42.5?

A) 58.43 lbs

B) 58.06 lbs

C) 45.15 lbs

D) 1.32 lbs

47. What additional weight and balance procedures is required for rotary wing aircraft that is not a function for fixed wing?

A) An auto-rotation test

B) A lateral C of G check

C) Static and dynamic main and tail rotor balancing

D) A mandatory test flight after maintenance mods, due to critical C of G operating envelopes

48. Complete the following sentence: weight and balance reports shall be certified by …

A) Signing a maintenance release

B) Signing a weight and balance amendment form

C) Completing a weight and balance addendum

D) Completing the weight and balance report and equipment list

49. What would need to be issued for an aircraft that has undergone a modification, resulting in a permanent change to the basic empty weight and empty weight C of G?

A) An airworthiness directive

B) A service bulletin

C) An amendment

D) An addendum

50. How is the center of gravity location commonly expressed for larger aircraft with swept back tapered wings?

A) % of the C of L (center of lift)

B) % of the MAC (mean aerodynamic chord)

C) FS (fuselage station) reference to the datum in feet

D) FS (fuselage station) reference to the datum in inches

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