Term
| What is the procedure for extinguishing reciprocating engine induction system fires that occur during starting? |
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Definition
| Continue cranking the engine to draw in the fire while maintaining the starting procedures. If the engine does not start and the fire continues to burn, stop and have the fireguard extinguish the fire |
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Term
| What are the results of using aviation gas that has been contaminated with jet fuel, in a reciprocating engine? |
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Definition
| Turbine fuel is unsafe for use in reciprocating engines and could cause damage or failure |
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Term
| What information must be located adjacent to fuel and oil filler openings? |
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Definition
The fuel filler opening must be clearly marked with the words:
Fuel, tank capacity and type of fuel.
The oil filler opening must be clearly marked with the words:
Oil and capacity |
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Term
| Describe the system used by aircraft fuel suppliers to designate performance rating of aviation gasoline. |
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Definition
| Aviation fuel has two scales to designate fuel grade: Example I00\130. The lower number designates the lean mixture rating and the higher number designates the rich mixture rating |
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Term
| What procedure should be followed before starting a reciprocating engine to detect liquid locking of the cylinders? |
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Definition
| Turn the engine over three or four complete revolutions by hand to detect a liquid lock. Never use force when a liquid lock is detected |
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Term
| What damage is most likely to result from liquid lock? |
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Definition
| Sufficient force can be exerted on the crankshaft to bend or break a connecting rod |
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Term
| What methods should be used to aid reciprocating engine starts in cold weather? |
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Definition
Use of pre-heat and oil dilution as needed
Proper mixture and priming procedures recommended by the manufacturer for the engine/carburetor combination |
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Term
| How do you determine the presence of water in aircraft fuel when draining fuel sumps? |
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Definition
| By using a clean clear container, the water will appear as droplets at the bottom of the container |
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Term
| May automotive gasoline be used in an aircraft engine? |
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Definition
| Only if its approved by the FAA in an STC and the TCDS should be checked for limitations |
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Term
| What is meant by the term "HOT START" when starting an aircraft turbojet (turbine) engine? |
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Definition
| When the engine starts and the EGT exceeds specified limits |
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Term
| When and why is pre-oiling of a reciprocating engine necessary? |
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Definition
| To provide adequate lubrication on initial start of a new engine or one that has been preserved for storage |
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Term
| When refueling an aircraft, what precautions should be taken? |
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Definition
Use of correct fuel
Proper grounding of aircraft and refueling unit
Protection of aircraft surface from hose or nozzle damage and fuel spillage hazard. |
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Term
| Where are aircraft taxi hand signals published? |
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Definition
| AIM-Airman's Information Manual |
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Term
| Why should aviation mechanics know standard light signals? |
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Definition
| For taxi control when taxiing |
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Term
| When towing an aircraft with a tow-tractor, what brakes are used when the aircraft is to be stopped? |
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Definition
| The tow-tractor brakes, the aircraft brakes should only be used in emergency conditions |
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Term
| What type of knots should be used when securing rope to secure light aircraft? |
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Definition
| Anti-slip knots like the bowline |
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Term
| What are the starting safety procedures when hand propping a small engine? |
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Definition
Fuel on, brakes on
Switch off, throttle closed
Contact is called and the switch is turned on
Be sure the ground is firm and do not lean into propeller arc |
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Term
| What are the physical and safety requirements for starting and running a powerplant? |
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Definition
| Use proper starting checklist. Position aircraft into the wind. Check prop blast area. Secure external power cart and use a fireguard |
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Term
| What would be the result of operating an engine with a lower grade of gasoline than specified? |
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Definition
Loss of engine power and efficiency
The probability of overheating and engine damage |
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Term
| What are the results of using aviation gas in a turbine engine? |
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Definition
A limited operation may be allowed by the manufacturer. Additives can develop deposits on turbine blades and vanes which may cause a loss in engine efficiency
Reduced service life and possible engine damage |
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Term
| What does the number 100 refer to in 100LL aviation gasoline? |
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Definition
| It is the lean mixture performance number or octane rating for the fuel |
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