96. SEMANAS 2018

Question

Q1. Which of the following are lubricating oil types?

Answer 1

Straight mineral oil

Answer 2

Ashless dispersant oil

Answer 3

Synthetic oil

Answer 4

All of them are correct

Answer 5

Wet sump lubrication system stores the oil in a reservoir inside the engine.

Answer 6

Dry sump lubrication system pumps the oil from the engine ́s crankcase to an external tank that stores oil.

Answer 7

A and B are true

Answer 8

A and B are false

Answer 9

Oil absorbs heat from the engine components and dissipates to the atmosphere through a heat exchanger

Answer 10

Sealing is one of the functions of engine oil

Answer 11

Engine oil increases friction created between the moving parts of the engine

Answer 12

All of them

Answer 13

Wide ratio of uses

Answer 14

Wide ratio of temperatures

Answer 15

It is specially designed for airplanes

Answer 16

It is specially prepared for winter

Answer 17

It must work properly in every altitude or atmospheric conditions

Answer 18

It doesn’t need an element to cool the lubricant

Answer 19

Oil leakages are not important

Answer 20

None of them are true

Answer 21

Pressure pump

Answer 22

Affects the behavior of the combustion with the possibility of detonations

Answer 23

Shortens the life of the engine

Answer 24

Impairs lubrication

Answer 25

All of them are true

Answer 26

They control the airflow

Answer 27

They increase the performances of the engine

Answer 28

They increase drag

Answer 29

None of them are disadvantages

Answer 30

A. For a fixed blade angle, variations in TAS (or RPM) implies variation of the angle of attack

Answer 31

B. For a fixed blade angle, variations in TAS (or RPM) do not implies variation of the angle of attack

Answer 32

C. The propeller can be optimized for several flight conditions

Answer 33

D. AandCaretrue

Answer 34

Pilot uses fine pitch during cruise

Answer 35

Pilot uses coarse pitch in take off

Answer 36

Pilot uses fine pitch during takeoff because more power is needed

Answer 37

All are false

Answer 38

A. The pitch setting must be modified by the pilot during the flight to maintain a determined constant rotational speed

Answer 39

B. The pitch setting varies automatically during the flight to maintain a determined constant rotational speed

Answer 40

C. The pilot actuates directly in the governor to control the blade angle variation

Answer 41

D. A and C are true

Answer 42

Piston engines

Answer 43

Both of them

Answer 44

None of them

Answer 45

It is an overspeed condition, so flyweights tilt outwards and raise pilot valve which introduces oil to increase propeller pitch and lower engine RPM

Answer 46

It is an underspeed condition, so flyweights tilt outwards and raise pilot valve which introduces oil to increase propeller pitch and lower engine RPM

Answer 47

It is an underspeed condition, so flyweights tilt inwards and pilot valve is forced down which decreases oil flow to decrease propeller pitch and increase engine RPM

Answer 48

None of them

Answer 49

It is an overspeed condition, so flyweights tilt outwards and raise pilot valve which introduces oil to increase propeller pitch and lower engine RPM

Answer 50

It is an underspeed condition, so flyweights tilt outwards and raise pilot valve which introduces oil to increase propeller pitch and lower engine RPM

Answer 51

It is an underspeed condition, so flyweights tilt inwards and pilot valve is forced down which decreases oil flow to decrease propeller pitch and increase engine RPM

Answer 52

None of them

Answer 53

A. A good propeller de-icing could be resistance heating elements

Answer 54

B. It causes aerodynamic shape lost

Answer 55

C. Due to the propeller's high spin velocity, icing in blades is not common

Answer 56

D. A and B are true

Answer 57

A. Propellers are better propellants than jet engines

Answer 58

B. Propellers are worse propellants than jet engines

Answer 59

C. Propellers are not good a high cruising speed due to excessive velocities in blade's tips

Answer 60

D. A and C are true

Answer 61

Junkers Ju 87

Answer 62

Heinkel He-178

Answer 63

It was the first jet-powered aircraft.

Answer 64

It was the first aircraft to break the sound barrier.

Answer 65

It was the first aircraft with sufficient speed to attack the German V1 flying bomb.

Answer 66

It was the first aircraft that could perform sustained inverted flight.

Answer 67

It had the first axial compressor in a turbojet engine.

Answer 68

It had the biggest change of pressure in one stage up until then.

Answer 69

It was the most produced engine in the WWII.

Answer 70

All the answers are false.

Answer 71

A turboprop produces more impulse than a turbojet.

Answer 72

A low-BPR turbofan has a bigger SFC than a high-BPR turbofan in low speeds.

Answer 73

A turboprop has a bigger SFC than a turbojet in low speeds.

Answer 74

A turboprop has the least SFC at any speed.

Answer 75

Axial compressor is a compressor in which the gas or working fluid principally flows parallel to the axis of rotation

Answer 76

Centrifugal compressor is a compressor in which the gas or working fluid principally flows with a radial component through the compressor.

Answer 77

A and B are correct

Answer 78

None of the above

Answer 79

Large size.

Answer 80

Smaller size.

Answer 81

The division between thrust (E) and airflow (G) is lower

Answer 82

None of the above

Answer 83

E (thrust) / G (airflow)

Answer 84

c (consumption) / E (thrust)

Answer 85

G (airflow) / E (thrust)

Answer 86

G (airflow) / c (consumption)

Answer 87

Secondary flow / Primary flow ; and primary flows through the combustion chamber.

Answer 88

Secondary flow / Primary flow ; and secondary flows through the combustion chamber.

Answer 89

Primary flow / Secondary flow ; and primary flows through the combustion chamber.

Answer 90

Primary flow / Secondary flow ; and secondary flows through the combustion chamber.

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96. SEMANAS 2018

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	Criado por Ismael Vázquez mais de 6 anos atrás