Ch 2B - Powerplant and Related Systems

Question 1

AC

Answer 1

Alternating Current - alternators produce

Question 2

DC

Answer 2

Direct Current - alternator rectifier converts AC to DC

Question 3

Turbine engine

Answer 3

Costly, powerful

Question 4

Reciprocating engine

Answer 4

Converts fuel into mechanical energy within cylinders

Question 5

Four-stroke operating cycle

Answer 5

intake of fuel/air mix, compression by the piston, ignition and expansion of the gas, venting of burned gas

Question 6

Throttle control

Answer 6

Controls engine power by regulating the amount of fuel and air mixture that flows into the cylinders

Question 7

Mixture control

Answer 7

Controls the fuel/air ratio

Question 8

Intake port

Answer 8

Where outside air enters induction system

Question 9

Carburetor

Answer 9

Mixes the incoming air with fuel and delivers it to the combustion chamber

Question 10

Carburetor ice

Answer 10

Caused by fuel vaporization and decreasing air pressure in the venturi, more likely to occur below 21C(70F) and relative humidity above 80%, carburetor heat systems route air across heat source before entering carburetor

Question 11

Supercharger

Answer 11

compresses incoming air using a pump driven by the engine

Question 12

Constant speed propeller

Answer 12

adjusted in cockpit, manifold pressure gauge monitor engine output by displaying pressure in inches of mercury (Hg)

Question 13

Constant speed propeller

Answer 13

adjusted in cockpit by propeller control, manifold pressure gauge monitor engine output by displaying pressure in inches of mercury (Hg) and propeller control sets engine RPM on the tachometer, low RPM and high manifold pressure causes engine stress

Question 14

Fixed pitch propeller is displayed on

Answer 14

a tachometer in revolutions per minute (RPM)

Question 15

Fuel injection

Answer 15

increases engine efficiency and eliminates carburetor ice

Question 16

Turbocharger

Answer 16

pressurizes air using a mechanism driven by engine exhaust gases

Question 17

Magneto

Answer 17

self-contained, supplies electrical current to the spark plugs

Question 18

Detonation

Answer 18

uncontrolled explosive ignition of the fuel/air mixture within the cylinders combustion chamber

Question 19

Preignition

Answer 19

uncontrolled combustion of fuel in advance of normal ignition

Question 20

Fuel pump system

Answer 20

engine driven pump provides fuel under pressure from the fuel tanks

Question 21

Fuel pressure gauge

Answer 21

useful in measuring fuel pump malfunctions

Question 22

Vapor lock

Answer 22

occurs when high engine temperatures cause bubbles of fuel vapor to form in the fuel lines or fuel pump

Question 23

Gravity-feed system

Answer 23

fuel flows from fuel tanks to engine by gravity

Question 24

Fuel tanks

Answer 24

usually in wings, has vent to make pressure equal in and out

Question 25

Fuel quantity gauges

Answer 25

use sensing unit to measure fuel, measured in gallons/pounds/metric units

Question 26

Fuel selector valve

Answer 26

Left/Right/Both/(Off)

Question 27

Fuel strainer

Answer 27

removes moisture and other sediments that settle at sump in bottom of the strainer

Question 28

Fill fuel tanks at end of the day

Answer 28

prevents moisture from condensing in tanks

Question 29

If fuel grade is not available

Answer 29

use next higher grade if approved by manufacturer, using a lower grade will cause engine to overheat

Question 30

Dry sump system

Answer 30

oil is contained in a separate tank and circulated through the engine by pumps

Question 31

wet sump system

Answer 31

all oil is carried in a sump that is part of the engine

Question 32

oil used for

Answer 32

lubrication of internal parts and cooling

Question 33

oil pressure gauge

Answer 33

indicates pressure in pound per square inch (PSI) or bars

Question 34

oil temperature gauge

Answer 34

can take several minutes after starting to read increase in temp

Question 35

High engine oil temp

Answer 35

caused by too low oil level

Question 36

Immediately after starting the engine

Answer 36

adjust RPM and check engine instruments for proper indications

Question 37

Cowl flap

Answer 37

creates a larger opening for air to exit the engine compartment

Question 38

Excessive engine temperatures

Answer 38

can result in loss of power, high oil consumption, and engine damage

Question 39

cylinder head temperature gauge

Answer 39

provides direct temp reading from one of the engine cylinders

Question 40

Engine temp can be reduced by

Answer 40

enriching the mixture, reducing the rate of climb, increasing airspeed, or reducing power

Question 41

If oil and cylinder head temp are above normal

Answer 41

you might be using too much power with an overly lean mixture

Question 42

Fixed pitch propeller

Answer 42

blade angle is set for primary function of the airplane and cannot be adjusted

Question 43

Climb propeller

Answer 43

propeller with low blade angle, provides best performance for takeoff and climb

Question 44

Cruise propeller

Answer 44

propeller with high blade angle, optimized for high speed and altitude cruise

Question 45

Alternator

Answer 45

produce AC current and then convert it to DC for use in the airplane

Question 46

Ammeter

Answer 46

monitors electrical current in amperes, can measure current flowing to/from battery and/or loadmeter measures load on alternator

Question 47

Master switch

Answer 47

controls entire electircal system except ignition system

Question 48

Standby battery

Answer 48

disconnects from main bus and powers essential bus

Question 49

When a mixture is leaned

Answer 49

fuel flow is decreased to compensate for decreased air density, can eliminate engine roughness during runup at high-elevation airports

Question 50

During descents from high to low altitudes

Answer 50

you have to enrich the mixture control

Question 51

First indication of carburetor ice in a fixed pitch propeller is

Answer 51

loss of RPM, caused by enriched mixture

Question 52

Carburetor heat

Answer 52

decreases engine performance

Question 53

If you suspect detonation on climbout

Answer 53

lower nose to increase airspeed and increase cooling airflow around the engine

Question 54

How to reduce engine temps

Answer 54

enrich the mixture, reduce rate of climb, increase airspeed, or reduce power