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Peters Test3 Review
| Question | Answer |
|---|---|
| What does the basic induction system of an aircraft consist of? | Air scoop to collect inlet air and ducting that transfers air to the inlet filter |
| What are the different arrangements for induction systems? | Updraft-type and downdraft-type |
| How can induction ice be prevented / eliminated? | By raising the temp of the air through the system using carburetor heat, well ahead of the dangerous icing systems |
| The complete induction system for an aircraft engine includes what 3 principal sections? | Air scoop and ducting, carburetor air control system, and intake manifold and pipes |
| What are the 3 types of induction filters? | Wetted-type mesh filters, dry paper filters, and polyurethane foam filters |
| MAP is the pressure inside of what part? | Manifold |
| When air is compressed, the temperature is _________. | Increased |
| What can happen when the fuel air mixture reaches an excessively high temperature? | Preignition or detonation |
| How is the position of the waste gate controlled? | By adjusting the oil pressure in the waste gate actuator |
| What is the compressor assembly of turbo supercharger made up of? | An impeller, diffuser, and a casing |
| The bellmouth is attached to the movable part of the _________ and _________ with the engine. | test stand, moves |
| High bypass turbofan engines are usually constructed with the fan at the forward end of the compressor. | True |
| The air accelerated by the outer part of the fan blades forms a secondary air stream which is ducted overboard without passing through the main engine. The secondary air produces 20% of the thrust in high bypass engines. | False |
| There are 2 general types of exhaust systems in use of reciprocating aircraft engines: the long stack (closed) system and the connector system. | False |
| Although the collector system raises the back pressure of the exhaust, the gain in hp from the turbo supercharging more than offsets the loss in hp from increased backpressure. | False |
| The augmenters are designed to produce a venturi effect to draw an increased airflow over the engine to augment engine cooling. | True |
| Exhaust system parts should never be marked with a lead pencil. | True |
| A good exhaust gasket seal is indicated by a flat gray or sooty black streak on the pipes in the sealed areas. | False |
| Daily inspection of the exhaust system usually consists of checking the exposed exhaust system for cracks, scaling, excessive leakage, and loose clamps. | True |
| Any exhaust system failure should be regarded as a severe hazard. | True |
| Approximately half of all muffler and heat exchanger failures can be traced to cracks or ruptures in the heat exchanger surfaces used for cabin and carburetor heat sources. | True |
| Internal muffler failures are rarely cause for partial or complete engine power loss by restricting the flow of the exhaust gases | False |
| When a turbocharger or a turbo supercharger system is included, the engine exhaust system operates under decreased pressure and temperature conditions. | False |
| Cracks in augmenter tubes can present a fire or carbon monoxide hazard by allowing exhaust gases to enter the nacelle, wing, or cabin areas. | True |
| Turboprop exhaust nozzles provide small amounts of thrust (10-15%) but are mainly used to discharge the exhaust gases from the aircraft. | True |
| The very first part of the exhaust nozzle and the exhaust plug form a convergent duct to reduce the in air flow. | False |
| Less air flow entering the carburetor will tend to make carburetors run richer at altitude than at ground level. | True |
| It is necessary that a mixture control be provided to lean the mixture and compensate for increased altitude. | True |
| If an engine is operating at high power setting with a very lean mixture, the cylinder-head temperatures would exceed the maximum permissible temperatures and detonation would occur. | True |
| Gasoline and other liquid fuels will burn even if they are not mixed with air. | False |
| A mixture with a ratio of 12 to 1 is made up of 12lbs air and 1 lb fuel. | True |
| The stoichiometric mixture produces the lowest combustion temperatures because the proportion of heat released to a mass of charge (fuel and air) is the greatest. | False |
| An engine running near full power requires a very lean mixture to prevent overheating and detonation. | False |
| As the air speeds up to get through the narrow portion of a venturi, its pressure drops | True |
Created by:
mattpayne001