A. POWERPLANT

The fuel required to produce a unit of thrust

What does the term specific fuel consumption refer to?

Axial Flow turbine

Which type of turbine is commonly used in modern jet engines

Better fuel efficiency

What is the primary advantage of using turbofan engine over a turbojet engine?

Supply air to the engine

What is the primary purpose of the induction system in an aircraft engine

to enhance lubrication and reduce wear

what is the primary purpose of oil additives in aircraft engines?

lower the temperature of cabin air

the function of the evaporator in freon cooling system is to

LOW

when checking a freon system, a steady stream of bubbles in the sight gauge indicates the charge is

high pressure vapor

what is the condition of refrigerant as it enters the condenser of a vapor cycle cooling system?

high pressure liquid

what is the condition of the refrigerant as it leaves the condensers of a vapor cycle cooling system?

pressure reducer valve

what is used in some oxygen systems to change high cylinder pressure to low system pressure

sensing

in which control element of an autopilot system is an attitude indicator?

servo

WHAT COMPONENT OF AN AUTOPILOT SYSTEM APPLIES TORQUE TO THE CONTROL SURFACES OF AN AIRCRAFT?

to reduce vibration and noise

IN A TWIN- ENGINE AIRCRAFT, WHAT IS THE PURPOSE OF SYNCHRONIZING THE PROPELLERS?

IT ROTATES AT A HIGHER RPM THAN SAFE LIMITS

WHAT HAPPEN WHEN A PROPELLER IS OVER SPEEDING?

blade back

WHICH OF THE FOLLOWING IS IDENTIFIED AS THE CAMBERED OR CURVED SIDE OF A PROPELLER BLADE, CORRESPONDING TO THE UPPER SURFACE OF A WING AIRFOIL SECTION?

HUB TO TIP

PROPELLER BLADE STATION NUMBERS INCREASE FROM:

PROVIDE SPARK FOR IGNITION

WHAT IS THE PURPOSE OF THE MAGNETO IN AN AIRCRAFT ENGINE

BEARING

WHICH COMPONENT IN A RECIPROCATION ENGINE HELPS REDUCE FRICTION BETWEEN MOVING PARTS

GENERATE ELECTRICAL POWER

WHAT IS THE PRIMARY FUNCTION OF THE ALTERNATOR IN AN AIRCRAFT ENGINE

COOL THE AIR BEFORE IT ENTERS THE ENGINE

WHAT IS THE PURPOSE OF AN INTERCOOLER IN A TURBOCHARGED ENGINE