RECIPROCATING ENGINES INDUCTION PART 1

If carburetor or induction system icing is not present when carburetor heat is applied with no change in the throttle setting, the. mixture will become richer. manifold pressure will increase. engine RPM will increase.

Cracks in cooling fins that do not extend into the cylinder head. should be left alone and monitored. may be repaired by removing the affected area and contour filing within limits. may be repaired by adding a stiffener.

Which of the following statements regarding volumetric efficiency of an engine is true?. The volumetric efficiency of an engine will remain the same regardless of the amount of throttle opening. It is impossible to exceed 100 percent volumetric efficiency of any engine regardless of the type of supercharger used. It is possible to exceed 100 percent volumetric efficiency of some engines by the use of superchargers of the proper type.

Which of the following would be a factor in the failure of an engine to develop full power at takeoff?. Improper adjustment of carburetor heat valve control linkage. Excessively rich setting on the idle mixture adjustment. Failure of the economizer valve to remain closed at takeoff throttle setting.

Which of the following should a mechanic consult to determine the maximum amount of cylinder cooling fin that could be removed when cracks are found?. AC 43.13-1A. Engine manufacturer's service or overhaul manual. Engine structure repair manual.

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.

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.

How do cowl flaps aid in cooling a horizontally opposed aircraft engine?. Recirculates air through the engine cylinders. Directs air through the engine cylinders. Controls the amount of air flowing around the cylinders.

Which of the following assists in removing heat from the metal walls and fins of an air-cooled cylinder assembly?. An intercooler system. A baffle and cowl arrangement. An engine induction system.

What directly regulates the speed of a turbocharger?. Turbine. Waste gate. Throttle.

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 a turbocharger system for a small reciprocating aircraft engine?. Compresses the air to hold the cabin pressure constant after the aircraft has reached its critical altitude. Maintains constant air velocity in the intake manifold. Compresses air to maintain manifold pressure constant from sea level to the critical altitude of the engine.

If an engine air filter element is not routinely cleaned and becomes excessively dirty, it can cause. the engine to not start. a loss of engine power. both A and B are true.

If a fire starts in the induction system during the engine starting procedure, what should the operator do?. Turn off the fuel pump switches. Continue cranking the engine. Turn off the magneto switches.

What is the position of the cowl flaps during engine starting and warmup operations under normal conditions?. Full open at all times. Full closed at all times. Open for starting, closed for warmup.

A bent cooling fin on an aluminum cylinder head should be. sawed off and filed smooth. left alone if no crack has formed. straightened out as much as possible without breaking.

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.

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.

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 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.

Carburetor icing is most severe at. air temperatures between 30 and 40°F. high altitudes. low engine temperatures.

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.

During an operational check of an electrically powered aircraft engine cowl flap system, the motor fails to operate. Which of the following is the first to be checked?. Flap actuator motor circuit breaker. Flap actuator control switch. Flap actuator motor.

What part of an aircraft in flight will begin to accumulate ice before any other?. Wing leading edge. Propeller spinner or dome. Carburetor.

Where would a carburetor air heater be located in a fuel injection system?. At the air intake entrance. None is required. Between the air intake and the venturi.