asa code

Question 1

What is checked on engine runup to determine the operational condition of the engine?

Answer 1

Idling RPM and manifold pressure, engine acceleration, maximum static RPM and manifold pressure, magneto drop, ignition switch safety check, propeller pitch change, propeller feathering, oil pressure, fuel pressure, and fuel flow.

Question 2

What are two main causes of a cylinder having low compression?

Answer 2

Piston rings not seating or broken, and valves not seating or burned.

Question 3

What is a low-tension ignition system?

Answer 3

using a magneto with a brush-type distributor and a coil that has no secondary wiring. Low voltage is directed from the magneto to a transformer mounted on the cylinder head. Here the low voltage is boosted to a high voltage and is directed through a very short high-tension lead to the spark plug. There is one transformer for each spark plug.

Question 4

what is advantage of horizontal opposed engine

Answer 4

lower power to weight ratio, low vibration, ideal for installation on wing

Question 5

What must be inspected to determine the airworthiness of an engine installation?

Answer 5

The propeller, lubrication system, ignition system, fuel metering system, cooling system, and the exhaust system.

Question 6

Where can you find the correct grade of fuel and amount of engine lubricating oil for an aircraft engine?

Answer 6

TCDS

Question 7

What are the basic steps in troubleshooting an engine installation?

Answer 7

a. Know how the system should operate.
b. Observe how the system is operating.
c. Divide the system into smaller parts to find the trouble.
d. Look for the obvious problems first.

Question 8

What must normally be done to a nose-wheel airplane before removing an engine?

Answer 8

tail of the airplane must be supported.

Question 9

What should be used to cover the ends of fuel and oil lines that have been disconnected from the engine?

Answer 9

The correct plugs or caps. Never cover the end of a line with tape.

Question 10

What is meant by a QEC engine assembly?

Answer 10

An engine that has been prepared for a quick engine change. The engine is on its mount and all of the accessories are installed. A minimum of time is required to change engines.
All that is needed is for the controls, wiring, and fluid lines to be connected to the firewall.

Question 11

What is meant by rigging the engine controls so they have some “cushion”?

Answer 11

The control on the engine component must contact its stop before the control handle in the flight deck reaches its stop. This causes the control handle to spring back a slight amount when it is moved to the extent of its

Question 12

What are two ways of pre-oiling an engine?

Answer 12

a. Before the spark plugs are installed and after the oil tank or sump is filled, turn the engine over with the starter until oil runs out of the fitting to which the oil pressure gauge connects.

b. Use a pre-oiler tank. Air pressure forces oil through all of the passages until some of it flows from the oil pressure gauge fitting.

Question 13

What is the purpose of a cold cylinder check?

Answer 13

cold cylinder check determines which cylinder is not firing. Run the engine for a few minutes at the speed, and on the magneto, at which it runs roughest. Shut it down and feel the exhaust stack near the cylinder head. The cylinder with the stack that is not as hot as the others is the cylinder that has not been firing.

Question 14

What engine fault could cause a turbine engine to have high exhaust gas temperature, low RPM, and high fuel flow at all engine pressure ratio settings?

Answer 14

Possible turbine damage and/or loss of turbine efficiency due to excessive wear.

Question 15

What would be the indications of an engine bleed-air valve malfunction?

Answer 15

Engine has higher-than-normal exhaust gas temperature during takeoff, climb, and cruise. RPM and fuel flow are higher than normal.

Question 16

what adjustment and rigging are accomplished on turbine engine

Answer 16

primary rigging -> adjust power control lever / fuel control unit

Question 17

who have responsibility keep aircraft safety

Answer 17

owner

Question 18

What kind of indicating system is used to measure oil temperature in a small, single-engine, general aviation airplane?

Answer 18

sealed system in which a bulb, partially filled with a highly volatile liquid, is installed inside the oil strainer.

Question 19

What kind of electrical instrument system is used for measuring oil temperature?

Answer 19

ratiometer-type system.

Question 20

What should a thermocouple cylinder-head temperature indicator read when the engine is cold?

Answer 20

same as outside temp

Question 21

What is critical in the installation of the thermocouple leads for a cylinder-head temperature indicator, the length of the leads or their resistance?

Answer 21

The resistance is critical, it must have the resistance specified on the indicator. This is usually 2 or 8 ohms.

Question 22

What should a ratiometer temperature indicator read when the electrical power is off?

Answer 22

off scale on low side

Question 23

How does a ratiometer-type oil temperature gauge measure the temperature of the oil?

Answer 23

ratiometer measures the resistance of the temperature bulb.

Question 24

What are four types of engine fire detection systems?

Answer 24

Thermoswitch system, thermocouple system, thermistor-type continuous-loop system, pneumatic-type continuous-loop system.

Question 25

Which type of fire detection system operates on the principle of the rate of temperature rise?

Answer 25

thermocouple

Question 26

Why must the reference junction in a thermocouple fire detection system be thermally insulated?

Answer 26

its temperature will not rise as quickly as that of the measuring junctions if a fire should

Question 27

How is a pneumatic-type continuous-loop fire detection system checked for operation?

Answer 27

test switch closed, current heats the element enough for it to release sufficient gas to activate the alarm switch.

Question 28

When determining maximum continuous electrical load of an aircraft, what defines if the load is intermittent or continuous?

Answer 28

The length of time the system is used. If the component or system is used for less than two minutes, it is considered an intermittent load. If it is used for more than two minutes, it is considered a continuous load.

Question 29

Why is stranded wire rather than solid wire used in most powerplant electrical systems?

Answer 29

Solid wire is likely to break when it is subjected to vibration.

Question 30

What two things must be considered in selection of wire size when making an electrical installation in an aircraft?

Answer 30

current-carrying capability of the wire, and the voltage drop

Question 31

What is used to protect a wire bundle from chafing where it passes through a hole in a bulkhead or frame?

Answer 31

grommet

Question 32

How are electrical wires protected where they pass through an area of high temperature?

Answer 32

insulator

Question 33

What is the minimum separation allowed between a wire bundle and a fluid line that carries combustible fluid or oxygen?

Answer 33

6 inches

Question 34

Which aircraft electrical circuit does not normally contain a fuse or circuit breaker?

Answer 34

starter

Question 35

When should aircraft wiring be installed in a conduit?

Answer 35

When the wiring passes through an area in the aircraft where open wiring could likely be damaged, such as through a wheel well.

Question 36

What is meant by a trip-free circuit breaker?

Answer 36

circuit breaker that opens a circuit any time an excessive amount of current flows,

Question 37

Which way should the toggle of a switch that controls the propeller pitch move to place the propeller in low pitch

Answer 37

forward

Question 38

What is straight mineral oil?

Answer 38

lubricating oil as obtained by fractional distillation of crude oil.

Question 39

What is ashless dispersant (AD) oil?

Answer 39

mineral lubricating oil containing additives, There are no ash-forming additives in AD oil.

Question 40

What is meant by a multiviscosity oil?

Answer 40

increases the viscosity of the oil when it is hot and decreases the viscosity when it is cold

Question 41

What are six functions of the oil in an aircraft engine?

Answer 41

a. Reduces friction. b. Seals and cushions. c. Removes heat. d. Cleans inside the engine. e. Protects against corrosion. f. Performs hydraulic action.

Question 42

What is the purpose of an air-oil separator, or deerator, in a turbine engine oil tank?

Answer 42

oil picks up a quantity of air and it is swirled as it enters the deerator.

Question 43

How is oil pressure regulated in an aircraft engine?

Answer 43

pressure-relief valve senses

Question 44

What is a hot-tank lubrication system for a turbojet engine?

Answer 44

lubrication system in which the oil cooler is in the pressure subsystem

Question 45

What is a cold-tank lubrication system for a turbojet engine?

Answer 45

lubrication system in which the oil cooler is in the scavenge subsystem,

Question 46

Where does a dry sump oil system store oil?

Answer 46

reservoir outside the engine

Question 47

What type of oil quantity indicator is used in most aircraft engines?

Answer 47

dipstick

Question 48

When should the engine oil quantity be checked on a turbine engine?

Answer 48

after shutdown

Question 49

Why do engine manufacturers recommend that engine lubricating oil be changed at specific intervals?

Answer 49

The oil picks up contaminants and carries them through the engine where they can cause wear.

Question 50

What kind of electric starting system is used on many of the smaller turbine engines?

Answer 50

starter-generator

Question 51

Why are air-turbine starters superior to electric starters for large turbine engines?

Answer 51

They are light weight for the torque they produce.

Question 52

Where does an air-turbine starter get its air for starting the engines on a jet transport airplane?

Answer 52

gpu, apu

Question 53

What prevents too high an air pressure from overspeeding an air-turbine starter?

Answer 53

air shutoff and regulating valve.

Question 54

Where does an air-turbine starter get its lubricating oil?

Answer 54

self-contained lubrication system

Question 55

What is the function of the capacitor in a magneto?

Answer 55

capacitor minimizes arcing at the breaker points, and it speeds up the collapse of the primary current

Question 56

What happens in a magneto ignition system when the ignition switch is placed in the Off position?

Answer 56

primary circuit is connected to ground.

Question 57

what position should the ignition switch be placed when using a timing light on the magnetos?

Answer 57

Both position.

Question 58

What malfunction in the ignition system would cause an aircraft reciprocating engine to continue to run after the ignition switch is placed in the Off position?

Answer 58

The ignition switch is not grounding the magneto primary circuit.

Question 59

What is the function of a float carburetor?

Answer 59

float carburetor's function is to measure airflow through the engine induction system

Question 60

What two things are adjusted when setting the idling conditions on a float carburetor?

Answer 60

a. Idling RPM by adjusting the throttle stop. b. Idling mixture by adjusting idle needle valve.

Question 61

What would likely cause a reciprocating engine equipped with a float carburetor to hesitate momentarily when the throttle is rapidly advanced from idle to full power?

Answer 61

malfunctioning accelerator pump.

Question 62

What is used in the TCM fuel injection system to control the amount of fuel sent to the nozzles?

Answer 62

The engine speed determines the injector pump output pressure. The relief valve determines the fuel for low-speed operation, and the adiustable orifice determines the fuel for high-speed operation.

Question 63

What is used in the Precision Airmotive system to control the amount of fuel sent to the nozzles?

Answer 63

The mass of the air entering the engine acts on an air diaphragm that controls a servo ball valve in the line between the regulator and the flow divider.

Question 64

Where are the fuel strainers normally located in an aircraft fuel system?

Answer 64

lowest point

Question 65

How can you tell when a fuel strainer for a turbine engine has been bypassed?

Answer 65

There is an indicator button that will pop out.

Question 66

What is the function of the snap ring inside the hub of a propeller that is mounted on a tapered or splined shaft?

Answer 66

snap ring allows the propeller to be pulled off of the shaft when the retaining nut backed off

Question 67

What are the basic types of propellers?

Answer 67

Fixed pitch, ground adjustable, constant-speed non-feathering, and constant-speed feathering.

Question 68

How is ice prevented from forming on propeller blades?

Answer 68

chemical anti-icing system is used.

Question 69

How is ice removed from propeller blades?

Answer 69

electrothermal deicing system is used.

Question 70

How can you determine that the electrically heated deicer boots on the propeller blades are working as they should?

Answer 70

ammeter