RECIPROCATING ENGINES INDUCTION PART 2

The purpose of a sonic venturi on a turbocharged engine is to. limit the amount of air that can flow from the turbocharger into the cabin for pressurization. increase the amount of air that can flow from the turbocharger into the cabin for pressurization. increase the velocity of the fuel/air charge.

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

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.

The most common method and generally the best conduction of heat from the inside of a cylinder barrel to the cooling air is accomplished by. machining fins directly on the outside of the barrel. shrinking on a jacket or muff of aluminum cooling fins around a steel cylinder sleeve. machining fins directly on the outside of the barrel and shrinking on a jacket or muff of aluminum cooling fins around a steel cylinder sleeve (on different areas of the barrel).

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

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.

What part of an air-cooled cylinder assembly has the greatest fin area per square inch?. Cylinder barrel. Rear of the cylinder head. Exhaust valve port.

A malfunction that causes the turbocharger waste gate or controller to fluctuate will. have no effect on manifold pressure. cause engine surges due to an erratic manifold pressure. cause the oil pressure to the turbocharger to decrease.

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.

Carburetor icing on an engine equipped with a constant-speed propeller can be detected by. a decrease in power output with no change in manifold pressure or RPM. an increase in manifold pressure with a constant RPM. a decrease in manifold pressure with a constant RPM.

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

An increase in manifold pressure when carburetor heat is applied indicates. ice was forming in the carburetor. mixture was too lean. overheating of cylinder heads.

What is the purpose of the rate-of-change controller in a turbocharger system?. Limits the maximum manifold pressure that can be produced by the turbocharger at full throttle conditions. Controls the rate at which the turbocharger discharge pressure will increase. 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.

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 purpose of an intercooler when used with a turbocharger is to cool the. exhaust gases before they come in contact with the turbo drive. turbocharger bearings. air entering the carburetor from the turbocharger.

During full power output of an unsupercharged engine equipped with a float-type carburetor, in which of the following areas will the highest pressure exist?. Venturi. Intake manifold. Carburetor air scoop.

Which of the following results in a decrease in volumetric efficiency?. Cylinder head temperature too low. Part-throttle operation. Short intake pipes of large diameter.

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).

Generally, a small crack just started in a cylinder baffle. requires repair by reinforcing, such as installation of a doubler over the area. requires no action unless it grows or is branched into two cracks. may be stop drilled.

Boost manifold pressure is generally considered to be any manifold pressure above. 14.7 "Hg. 50 "Hg. 30 "Hg.

The primary purpose of baffles and deflectors installed around cylinders of air-cooled aircraft engines is to. create a low pressure area aft of the cylinders. force cooling air into close contact with all parts of the cylinders. increase the volume of air used to cool the engine.

When starting an engine equipped with a carburetor air heater, in what position should the heater be placed?. HOT. COLD. NEUTRAL.

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.

High cylinder head temperatures are likely to result from. a very lean mixture at high power settings. fouled spark plugs. a very rich mixture at high power settings.