Ground operation and servicing

Question 1

Name possible hazards that may be encountered during typical ground operations

Answer 1

Fire during engine start, turning propellers, rotors, jet blast, and turbine inlet areas. Other aircraft vehicles, people obstacles, foreign object debris

Question 2

What is the most generally use knot for tying down small aircraft?

Answer 2

The bowline

Question 3

Describe the precautions that should be taken to protect life and property while starting and running an aircraft engine

Answer 3

Study the procedures in the airplane flight manual, be sure the propeller or inlet area is clear and check the area for loose stones gravel debris that can be sucked into the prop or engine

Question 4

If an engine induction fire occurs while starting a reciprocating engine, what procedure should be followed to extinguish the fire

Answer 4

Continue cranking the engine to start it and hopefully suck the fire into the engine. If the engine doesn’t start in the fire continues to burn discontinued to start a time shut off the fuel source extinguish the fire with a suitable fire extinguisher

Question 5

What safety procedures must be observed on hand propping a small aircraft

Answer 5

Become thoroughly trained, have a qualified person in the cockpit, checked the brakes call switch off before moving the prop and make sure you have a solid footing. When ready to start, call contact and listen for the reply swing the prop with the flat of your hand and move back from the prop arc

Question 6

What procedure should be followed prior to starting a large radial engine to detect and or prevent hydraulic lock in the cylinders

Answer 6

Pull the propeller through by hand for three or four revolutions resistance to the prop turning indicates a possible hydraulic lock at least one of the cylinders

Question 7

What is the cause of hydraulic lock in large radial engines?

Answer 7

Oil seeps between the piston rings and accumulates in the combustion chamber of the lower cylinders

Question 8

What damage is most likely to result from hydraulic lock?

Answer 8

Sufficient for us can be exerted on the crankshaft to bend, or break the connecting rod

Question 9

What is a material safety data sheet?

Answer 9

A detailed chemical information sheet explaining health and safety risk when using the product

Question 10

What are the safety precautions when using a drill press

Answer 10

Where I protection and air protection, clamp, all work, securely, proper RPM, for the material used stop machine to make adjustments to the work, or to remove jammed, work and clean the area when finished

Question 11

When towing in aircraft with a tow vehicle, what breaks are used when the aircraft is to be stopped?

Answer 11

The tow vehicle breaks, the aircraft brakes should only be used in an emergency

Question 12

What is meant by a hot start when starting a jet engine?

Answer 12

Ignition occurs with an excessively rich mixture, leading to a rapid temperature rise that can exceed the EGT limit

Question 13

Why should a mechanic know the standard light signals at an airport?

Answer 13

Light signals bank may be used when taxiing an airplane without a radio, or when a radio becomes in operative of a tower controlled airport

Question 14

If a mixture of aviation, gasoline and jet fuel is used in a reciprocating aircraft engine, order the possible results

Answer 14

Avgas contaminated by jet fuel, must not be used in piston engines. The engine may be damaged or destroyed.

Question 15

When is pre-oiling of a reciprocating engine necessary

Answer 15

Pre-oiling is used before starting a new engine or an engine that has been preserved for storage

Question 16

What does the number 100 signify in 100 LL aviation gasoline?

Answer 16

It refers to the lean mixture, performance number, or octane rating of the fuel

Question 17

Is it permissible to use of gas in a turbine engine?

Answer 17

Limited operation may be allowed by the manufacture, continued use, may reduce efficiency due to lead deposits on the turbine blades

Question 18

What are some of the possible outcomes of using a low-grade of avgas, then the specified grade

Answer 18

And increase chance of engine damage, due to detonation loss of engine power, and an increased probability of overheating

Question 19

Part 23.973 of the FAA regulations specifies that certain markings must be placed adjacent to the fuel filler openings what markings are used for reciprocating engine powered airplanes

Answer 19

The filler openings must be marked with the fuel grade and the word avgas

Question 20

Describe the important precautions that should be observed when fueling an aircraft

Answer 20

Be certain you are using the correct fuel properly, ground the aircraft and refueling unit and protect the aircraft surfaces from hose and nozzle damage

Question 21

The marking requirements for oil tank, filler openings as specified by FAR 23.1157. What markings are required for piston powered airplanes?

Answer 21

The word oil, and the permissible grades, and or types or reference to the appropriate airplane flight manual for permissible, grades, and or types

Question 22

Where can the standard aircraft taxi hand signals be found?

Answer 22

In the aeronautical information manual

Question 23

Under what condition may automobile gasoline be used in an aircraft engine?

Answer 23

Only if approved by the FAA usually by the issuance of the supplementary type certificate (STC)

Question 24

What are the indications of water in aircraft feel after draining a sample from the fuel sumps

Answer 24

The sample may have a cloudy or hazy appearance, or a solid slug of water in the bottom of the sample