FAA RECIPROCATING ENGINE INDUCTION AND COOLING SYS 3

Which of the following is a function of the differential pressure controller?. It limits the maximum manifold pressure that can be produced by the turbocharger at full throttle conditions. It controls all positions of the waste gate except at fully open position. It controls the position of the waste gate after the aircraft has reached its critical altitude.

Reciprocating engines used in helicopters are cooled by. the downdraft from the main rotor. a fan mounted on the engine. blast tubes on either side of the engine mount.

The differential pressure controller in a turbocharger system. reduces bootstrapping during part-throttle operation. positions the waste gate valve for maximum power. provides a constant fuel-to-air ratio.

What method(s) is/are used to provide clean air to the engines of helicopters and turboprop airplanes that have particle (sand and ice) separators installed?. Positive and negative charged areas to attract and/or repel particulates out of the airflow. Air/moisture separators, and 'washing' the air clean utilizing water droplets. Sharp airflow directional change to take advantage of inertia and/or centrifugal force, and filters or engine inlet screens.

A carburetor air pre-heater is not generally used on takeoff unless absolutely necessary because of the. loss of power and possible detonation. possibility of induction system overboost. inability of the engine to supply enough heat to make a significant difference.

The application of carburetor heat during engine operation will. decrease the weight of the fuel/ air charge. decrease the volume of air in the cylinder. increase the density of air in the cylinder.

Aircraft reciprocating engine cylinder baffles and deflectors should be repaired as required to prevent loss of. power. fin area. cooling.

When a fireguard is standing by during an engine start, they should be watching for potential fires that could start. close to the battery compartment or starter. in the induction system or the exhaust system. at the ground power receptacle (if connected to a ground power unit).

Bootstrapping of a turbocharged engine is indicated by. an overboost condition of the engine on takeoft. a transient increase in engine power. a maximum increase in manifold pressure.

On small aircraft engines, fuel vaporization may be increased by. cooling the air before it enters the engine. circulating the fuel and air mixture through passages in the oil sump. heating the fuel before it enters the carburetor.

When operating an engine, the application of carburetor heat will have what effect on the air-fuel mixture?. Enriching the mixture because the AMC cannot make a correction for increased temperature. Enriching the mixture until the AMC can make a compensation. Leaning the mixture until the AMC can make a compensation.

What is the function of a blast tube as found on aircraft engines?. A means of cooling the engine by utilizing the propeller backwash. A tube used to load a cartridge starter. A device to cool an engine accessory.

The use of the carburetor air heater when it is not needed causes. a very lean mixture. excessive increase in manifold pressure. a decrease in power and possibly detonation.

The greatest portion of heat generated by combustion in a typical aircraft reciprocating engine is. converted into useful power. carried out with the exhaust gases. dissipated through the cylinder walls and heads.

Carburetor icing may be eliminated by which of the following methods?. Alcohol spray and electrically heated induction duct. Ethylene glycol spray and heated induction air. Alcohol spray and heated induction air.

Where are cooling fins usually located on air-cooled engines?. Exhaust side of the cylinder head, inside the pistons, and connecting rods. Cylinder head, cylinder walls, and inside the piston. Cylinder head, cylinder barrel, and inside the piston.

What is the purpose of an augmenter used in some reciprocating engine exhaust systems?. To reduce exhaust back pressure. To aid in cooling the engine. To assist in displacing the exhaust gases.

What is used to drive a supercharger?. Exhaust gases. Gear train from the crankshaft. Belt drive through a pulley arrangement.

Into what part of a reciprocating engine induction system is deicing alcohol normally injected?. The supercharger or impeller section. The airstream ahead of the carburetor. The low-pressure area ahead of the throttle valve.

The pressure between the turbocharger and the throttle valve is called. turbocharger boost pressure. induction manifold pressure. upper deck pressure.

What are the three basic regulating components of a sea-level boosted turbocharger system?. Exhaust bypass assembly, compressor assembly, and density controller. Exhaust bypass assembly, density controller, and differential pressure controller. Pump and bearing casing, compressor assembly, and density controller.

In an airplane equipped with an alternate air system, if the main air duct air filter becomes blocked or clogged, the. system will automatically allow warm, unfiltered air to be drawn into the engine. flow of air into the engine will be slowed or cut off unless alternate air is selected. system will automatically allow warm, filtered alternate air to be drawn into the engine.

One source commonly used for carburetor air heat is. turbocharger heated air. alternate air heat. exhaust gases.

Which of the following defects would likely cause a hot spot on a reciprocating engine cylinder?. Too much cooling fin area broken off. A cracked cylinder baffle. Cowling air seal leakage.

An engine becomes overheated due to excessive taxiing or improper ground runup. Prior to shutdown, operation must continue until cylinders have cooled, by running engine at. low RPM with oil dilution system activated. idle RPM. high RPM with mixture control in RICH position.