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RPC/RPL > BAK - Engine & Engine Systems > Flashcards

BAK - Engine & Engine Systems Flashcards

1
Q

What component of a piston engine provides the chamber for the combustion of the fuel-air mixture?

A

The cylinders

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2
Q

Is the power generated by the pistons transmitted by the, connecting rod or the rotating engine crank shaft, to the propellor to produce thrust?

A

Rotating engine crank shaft

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3
Q

What is the engine component that converts the reciprocating “up-and-down” motion of the piston to the rotary motion of the crankshaft?

A

Connecting Rod

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4
Q

What engine components are housed in the cylinders?

A

Pistons, Piston Rings, Valves, and Spark Plugs

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5
Q

How many spark plug are housed in each cylinder of a typical recreational piston aircraft?

A

2

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6
Q

The force due to combustion is transmitted to the connecting rod by which engine component?

A

Pistons

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7
Q

True or False - One function of the piston rings is to prevent leakage of combustion pressure around the pistons, which would result in a loss of power?

A

True

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8
Q

In correct order, name the four strokes of a typical 4-cylinder piston engine?

A

Induction / Intake
Compression
Power
Exhaust

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9
Q

True or False - Each magneto in a dual ignition system ‘fires’ one spark plug in each cylinder

A

True

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10
Q

Name two advantages of a dual ignition system

A

Redundancy should one system fail, and
enhanced combustion

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11
Q

What is the power source that provides the ‘spark’ for the ignition system?

A

The magnetos

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12
Q

What is the power source for the electric starter motor?

A

The battery

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13
Q

When operating on one magneto, will there be a slight rise or drop in RPM if the magneto is operating properly?

A

Drop

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14
Q

What is the purpose of the lubrication system?

A

Reduce friction of engine components and aid cooling but removing heat around engine components

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15
Q

Having determined that the problem is not the selection of an empty fuel tank, what is the likely cause of a low fuel pressure reading?

A

Engine-driven fuel pump failure

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16
Q

Do high-wing aircraft usually have gravity-fed or pump-fed fuelling systems?

A

Gravity-fed

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17
Q

What is the purpose of the back-up electric pump associated with pump-fed fuelling systems?

A

For emergencies in case the engine-driven pump fails, and for starting.

18
Q

In pump-fed fuel systems, should the back-up electric pump be selected to ON or OFF during take-offs, landings and when switching between tanks?

A

Selected “ON”

19
Q

What may a blocked oil cooler result in?

A

Engine overheating

20
Q

In what atmospheric conditions are vapour locks in the fuel lines most likely to occur?

A

Low atmospheric pressure, and high temperatures

21
Q

What pre-take off action should the pilot take if they suspects “heat-soaking” of the engine?

A

Do not take-off to quickly after the previous flight, and perform an adequate engine run-up prior to take-off to purge the fuel lines of vapour locks

22
Q

What is the colour of 110L AVGAS? What is the colour of AVTUR?

A

110L AVGAS is blue, and

AVTUR is clear.

23
Q

True or False - Fuels with a lower octane rating are more prone to detonation?

A

True

24
Q

What is the term used to describe an oil’s flow properties?

A

Viscosity

25
Q

Using fuel higher than the specified grade is likely to result in what?

A

Spark plug fouling

26
Q

Do high or low viscosity oils flow more freely?

A

Low viscosity

27
Q

Do high or low temperatures increase an oil’s viscosity and therefore make them flow more freely?

A

High temperatures

28
Q

True or False - Different grades of single viscosity oil are used depending on whether the temperature is hot or cold?

A

True

29
Q

For what purpose are multi-grade oils produced?

A

So that the one oil can be used in either hot or cold temperatures

30
Q

True or False - inadequate lubrication is a likely result of using an oil that is higher or lower grade than specified?

A

True

31
Q

Name two contaminants of fuel

A

Any two of the following:

Water,
Solids - rust, dirt, scale,
Incorrect grade of fuel - ie MOGAS, AVGAS, AVTUR,
Chemical additives in incorrect proportions

32
Q

What is the main advantage of filling the fuel tanks over night?

A

It reduces the risk of condensation that may occur over night, and it reduces the risk of fire

33
Q

Is excess oil being burnt in the cylinders indicated by blue or black smoke from the exhaust?

A

Blue smoke

34
Q

Does an excess oil level above the specified amount increase the possibility of spark plug fouling or engine overheating?

A

Spark plug fouling

35
Q

Before the first flight of the day and after each refuelling, what should the fuel tanks be checked for the presence of?

A

Presence of water

36
Q

Does a carburettor sense the weight or volume of air being drawn into the engine?

A

Volume of air

37
Q

If a fuel/air mixture is richer than the chemically correct mixture (CCM), would the fuel/air mixture contain more or less fuel than the reference mixture?

A

More

38
Q

What is the main disadvantage of recreational aircraft having a carburettor is a carburettor’s susceptibility to XXX?

A

Engine icing

39
Q

In an aircraft with a fuel pressure gauge (usually a pump-fed system), is a blocked vent most likely indicated by a sudden or gradual loss of fuel pressure?

A

Gradual

40
Q

Will replacing your aircraft with a fine or coarser pitch propellor likely result in an increased take-off distance, a reduced climb performance and an improved cruise performance?

A

Coarser pitch

41
Q

Loss of thrust, engine wear and vibration a likely result of a stone-damaged or a coarser pitch propellor?

A

Stone-damaged propellor

42
Q

Your aircraft has a back-up electric-fuel pump and upon starting it is apparent that is has failed. Why is it important not to take-off?

A

Because the electric back-up fuel pump is needed in flight in case the engine-driven fuelpump fails

RPC/RPL (39 decks)

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