RECIPROCATING ENGINES INDUCTION PART 3

The action of a carburetor airscoop is to supply air to the carburetor, but it may also. cool the engine. keep fuel lines cool and prevent vapor lock. increase the pressure of the incoming air by ram effect.

If the turbocharger waste gate is completely closed,. none of the exhaust gases are directed through the turbine. the turbocharger is in the OFF position. all the exhaust gases are directed through the turbine.

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.

A method commonly used to prevent carburetor icing is to. preheat the intake air. mix alcohol with the fuel. electrically heat the throttle valve.

Using compressor bleed air directed into a nozzle, a vortex dissipater's primary function is to. reduce wingtip vortices. increase lift capability of aircraft flaps. destroy vortices that can suck debris from the ground into engines that are mounted in pods that are low to the ground.

A broken cooling fin on a cylinder head. is cause for rejection of the head. may be filed to smooth contours if damage and/or repair limits are not exceeded. should be left alone.

As manifold pressure increases in a reciprocating engine, the. volume of air in the cylinder increases. weight of the fuel/air charge decreases. density of air in the cylinder increases.

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.

The undersides of pistons are frequently finned. The principal reason is to. provide sludge chambers and sediment traps. provide for greater heat transfer to the engine oil. support ring grooves and piston pins.

In addition to causing accelerated wear, dust or sand ingested by a reciprocating engine may also cause. silicon fouling of spark plugs. sludge formation. acid formation.

The application of carburetor heat will have which of the following effects?. The manifold pressure will be increased. The mixture will become leaner. The mixture will become richer.

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

Increased engine heat will cause volumetric efficiency to. remain the same. decrease. increase.

Prolonged idling of an engine will usually result in. excessive cylinder head temperatures. increased oil consumption. foreign material buildup on spark plugs.

The purpose of a bellmouth compressor inlet is to. provide an increased ram air effect at low airspeeds. maximize the aerodynamic efficiency of the inlet. provide an increased pressure drop in the inlet.

If a turbocharger waste gate is not able to close fully,. the aircraft will not be able to reach its critical altitude. the engine is more likely to over boost. none of the exhaust gases will flow through the turbine.

What is the purpose of the density controller in a turbocharger system?. Limits the maximum manifold pressure that can be produced at other than full throttle conditions. Limits the maximum manifold pressure that can be produced by the turbocharger at full throttle. Maintains constant air velocity at the carburetor inlet.

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.

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.

Which of the following statements is true?. Some aircraft exhaust systems include an augmenter system to remove air over the engine for cooling. Augmenter systems are used to create a low-pressure area at the lower rear of the aircraft engine cowling. Augmenter systems are used to create a high-pressure area at the lower rear of the aircraft engine cowling.

During ground operation of an engine, the cowl flaps should be in what position?. Fully closed. Fully open. Opened according to ambient conditions.

Cylinder head temperatures are measured by means of an indicator and a. resistance bulb sensing device. wheatstone bridge sensing device. thermocouple sensing device.

The position of the cowl flaps during normal cruise flight conditions is. closed. open. neutral.

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.

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