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PPL Course - (2) RPL (Exam Review) > Chapter 5.3 - Exam Review > Flashcards

Chapter 5.3 - Exam Review Flashcards

1
Q

In Aircrafts with a fixed-pitch propeller, (airspeed/engine speed) is a measure of power out?

A

Engine Speed.

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2
Q

Opening and closing the Throttle too quickly can overstress the Engine by (increasing/decreasing) the cylinder head temperatures and bearing pressures.

A

Increasing.

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3
Q

If excess fuel is left in the cylinders after combustion, the mixture is said to be (lean/rich)?

A

Rich.

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4
Q

A lean mixture is one where excess (air/fuel) is left in the cylinders after combustion.

A

Air.

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5
Q

What is the name for a mixture which produces complete combustion?

A

A Chemically Correct Mixture (CCM).

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6
Q

Does this mixture produce the best power? If not what fuel-air mixture does produce the best power (2)?

A
  • No.

- Slightly higher than CCM.

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7
Q

Air density (increases/decreases) with increases in Altitude?

A

Decreases.

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8
Q

A Carburettor senses the (weight/volume) of air entering the Engine?

A

Volume.

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9
Q

As an Aircraft climbs into less dense air, the fuel-air mixture becomes (richer/leaner)?

A

Richer.

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10
Q

Fouled spark plugs are a likely result of an (over-lean/over-rich) mixture?

A

Over-rich.

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11
Q

An over-rich mixture is indicated by (blue/black) smoke from the exhaust?

A

Black.

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12
Q

Afterfiring is more likely consequence of an (over-rich/over-lean) mixture?

A

Over-rich.

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13
Q

Is detonation more likely from an over-rich or over-lean mixture at high power settings?

A

Over-lean.

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14
Q

During a climb, the Throttle must be opened progressively to maintain a constant Engine power output. Eventually, an Altitude is reached where the Throttle is fully open. What is the term given to this Altitude?

A

Full Throttle Height.

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15
Q

Name two reasons for selecting ILDE CUT-OFF to stop the Engine rather than just turning the Ignition off?

A
  • Stops propeller being turned on if Ignition is left on.

- Ensure Carburettor remains full of Fuel.

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16
Q

What is the likely result of leaning the Fuel-air Mixture at high power settings (above 75% MC)?

A

Detonation.

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17
Q

A (rich/lean) mixture at full power is used for all takeoffs except those in reduced density conditions because the cooling effect of the (rich/lean) mixture (lowers/increases) the detonation threshold?

A
  • Rich.
  • Rich.
  • Lowers.
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18
Q

Why should the Fuel-air Mixture be leaned according to the manufacturer’s instructions before takeoff from high altitude airports (elevation above 5000 ft)?

A

Due to with Air-Density conditions.

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19
Q

Why should the Mixture Control be selected to FULL-RICH on descent?

A

To avoid the Engine stopping at low power settings.

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20
Q

Name two likely causes of detonation?

A
  • Wrong grade of Fuel being used.

- High Fuel-air Mixture and wide open Throttle settings.

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21
Q

What action should a Pilot take if detonation is suspected (3)?

A
  • Enrich the Fuel-air Mixture.
  • Turn Carburettor Heat Control to OFF.
  • Reduce Power.
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22
Q

Premature combustion of the Fuel-air Mixture caused by a local hot spot in the combustion chamber is called (detonation/pre-ignition)?

A

Pre-ignition.

23
Q

Name two ways of preventing abnormal combustion (3)?

A
  • Correct use of Fuel Mixture Control.
  • Not exceeding maximum RPM.
  • Use correct grade of Fuel.
24
Q

What is the first indication of Carburettor icing in an Engine with fixed-pitch propeller?

A

A gradual loss in RPM.

25
Q

Fuel Evaporation and Throttle ice are more likely in (below freezing/mild) temperatures and (high/low) humidity?

A
  • Mild.

- High.

26
Q

Is Carburettor icing more likely at (wide-open/part Throttle) settings?

A

Part Throttle.

27
Q

(Fuel injected systems/Carburettors) are more susceptible to Fuel Evaporation and Throttle icing?

A

Carburettors.

28
Q

What is the danger of incorrectly diagnosing Carburettor icing and progressively opening the Throttle to compensate for the reduction in RPM?

A

Build-up of ice will make it impossible to remove and cause complete Engine stoppage.

29
Q

Impact ice is most likely to form at atmospheric temperatures ranging from (0°C to -25°C/0°C to 16°C) when visible moisture (is/is not) present?

A
  • 0°C to -25°C.

- Is.

30
Q

What type of control is used in fuel injected Engines to bypass the filter in case it gets blocked with impact ice?

A

Alternate Air Control.

31
Q

When using the Carburettor Heat Control as a de-icing device, an (increase/decrease) in RPM indicates that the ice has been removed?

A

Increase.

32
Q

What is the reason for not moving the Throttle initially when applying Carburettor Heat under suspected icing conditions?

A

If ice is present, the Engine may stop due to ice from the Throttle Butterfly.

33
Q

When using the Carburettor Heat Control as an anti-icing device on descent, why should full heat be applied before closing the Throttle?

A

To maximise the amount of heated air.

34
Q

The use of Carburettor heat (increases/reduces) the power output of an Engine?

A

Reduces.

35
Q

Carburettor heat should not be used on takeoff because it (increases/reduces) the power out and (increases/reduces) both the climb performance and Airspeed?

A
  • Reduces.

- Reduces.

36
Q

The reduction in power caused by the application of Carburettor heat is a result of the (more/less) dense ‘heated’ air and the (richer/leaner) mixture it produces?

A
  • Less.

- Richer.

37
Q

The use of Carburettor heat on takeoff not only has a detrimental effect on power output; it may also (increase/decrease) the operating temperature of the Engine and cause detonation?

A

Increase.

38
Q

Why should Carburettor heat be selected off just before Landing?

A

In case full power is required for a go-around.

39
Q

What is the reason for limiting the maximum RPM of an Engine?

A

To ensure the Engine is not overstressed and damaged.

40
Q

What is the reason for minimum limit being placed on Oil Pressure?

A

To ensure the Engine is receiving a minimum amount of Oil needed to prevent Engine damage and failure.

41
Q

Maximum Cylinder Head Temperatures are limited because as metal gets hotter, its strength is (increased/reduced)?

A

Reduced.

42
Q

Above the maximum temperature limit, the Oil will get too hot. Name two likely consequences of this (4)?

A
  • Engine will overheat and cause loss of power.
  • Possible Detonation.
  • Probable Engine damage.
  • Excessive Oil consumption.
43
Q

At Oil temperatures (below the minimum/above the maximum), the Oil pump will not be able to pump the cold and thick Oil sufficient for proper pressure and lubrication?

A

Below the minimum.

44
Q

What term is given to the maximum power that can be maintained continuously by an Engine?

A

Maximum Continuous Power (MC).

45
Q

In Aircrafts with a fixed-pitched propeller, Throttle setting is proportional to both Engine speed (RPM) and power output. With the Throttle closed, will the Engine speed (RPM) and power output be (high/low)?

A

Low.

46
Q

Give two reasons why the Engine should be warmed periodically during a prolonged glide?

A
  • Clean Engine of Carbon.

- Keeping Oil Temperature operating normally.

47
Q

Keeping Carburettor heat on during closed-throttle operations (reduces/improves) fuel vaporisation?

A

Improves.

48
Q

Why should the Starter be engaged for short periods only?

A

If prolonged this may cause damage to the Starter Motor and the Battery.

49
Q

Why should you not exceed 1000 RPM during the first minute of operation when starting a cold Engine?

A

Engine damage will occur to the Oil Temperature being low.

50
Q

Why shouldn’t the Starter be re-engaged while the propeller is still turning?

A

Can damage the Starter Motor.

51
Q

Why is the Ignition system checked prior to takeoff?

A

To check both Magnetos are operational.

52
Q

If recommended by the manufacturer, why is the Ignition system sometimes checked at idling RPM prior to Engine shut-down?

A

To confirm the Magnetos are deactivated (grounded).

53
Q

What is the effect of prolonged idling on Engine operation (2)?

A
  • This may cause Spark Plug Fouling.

- Engine Overheating.

PPL Course - (2) RPL (Exam Review) (18 decks)

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