semana Carol segundo parcial

Question

Q1. Which was the first jet-powered aircraft?

Answer 1

A. Spitfire

Answer 2

B. Junkers Ju 87

Answer 3

C. Bell P-59

Answer 4

D. Heinkel He-178

Answer 5

A. It was the first jet-powered aircraft.

Answer 6

B. It was the first aircraft to break the sound barrier.

Answer 7

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

Answer 8

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

Answer 9

A. It had the first axial compressor in a turbojet engine.

Answer 10

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

Answer 11

C. It was the most produced engine in the WWII.

Answer 12

D. All the answers are false.

Answer 13

A. A turboprop produces more impulse than a turbojet.

Answer 14

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

Answer 15

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

Answer 16

D. A turboprop has the least SFC at any speed.

Answer 17

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

Answer 18

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

Answer 19

C. A and B are correct

Answer 20

D. None of the above

Answer 21

A. Large size.

Answer 22

B. Smaller size.

Answer 23

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

Answer 24

D. None of the above

Answer 25

(E (thrust) )/(G (airflow) )

Answer 26

(c (consumption) )/(E (thrust) )

Answer 27

(G (airflow) )/(E (thrust) )

Answer 28

(G (airflow) )/(c (consumption) )

Answer 29

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

Answer 30

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

Answer 31

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

Answer 32

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

Answer 33

A. Increase thrust

Answer 34

B. Increase Specific Fuel Consumption

Answer 35

C. Decrease thrust

Answer 36

D. A and B are correct

Answer 37

A. Generally, subsonic inlets are named “Pitot”

Answer 38

B. Typical parameters are NACA Serie 1 profiles

Answer 39

C. Drag is not due to inlet outer surface

Answer 40

D. The shape is aerodynamically smooth

Answer 41

A. 2D or spike

Answer 42

B. 3D or wedge

Answer 43

C. 2D or wedge

Answer 44

D. A and B are correct

Answer 45

A. Increase the pressure of the air mass received

Answer 46

B. Take the air to the combustion section

Answer 47

C. Provide bleed air for cabin pressure and other systems

Answer 48

D. All are correct

Answer 49

A. Bi-directional

Answer 50

C. Centrifugal

Answer 51

D. B and C are right

Answer 52

A. Diffuser

Answer 53

B. Stabilizer

Answer 54

C. Front case

Answer 55

D. Impeller

Answer 56

A. Divergent nozzles

Answer 57

B. Convergent nozzles

Answer 58

C. Divergent and convergent nozzles

Answer 59

D. None of them

Answer 60

A. Single-spool is a type of axial compressors

Answer 61

B. Multi-spool is a type of centrifugal compressors

Answer 62

C. Generally, in aviation are used single-spool and two spools

Answer 63

D. Multi-spool is a type of axial compressors

Answer 64

A. Boundary layer can stall

Answer 65

B. Will cause transonic zones

Answer 66

C. Can cause heating problem

Answer 67

D. Nothing can go wrong

Answer 68

A. Variable IGV

Answer 69

B. Variable stator blades

Answer 70

C. They close when velocity reduces

Answer 71

D. None of the above

Answer 72

A. Provides information of pressure ratio an equivalent flow for a throttle setting (IDLE-100%)

Answer 73

B. Does not give info relative to throttle settings

Answer 74

C. Gives info relative to weather conditions

Answer 75

Both A and C are correct

Answer 76

A. Ensure stable fuel burn with max. Thermal efficiency in large conditions ranges

Answer 77

B. Are not used for aviation engines

Answer 78

C. Max temperature (850-1700ºC) due to turbine materials

Answer 79

D. Combustion is initiated by an electric spark from an igniter plug

Answer 80

A. Corrugated strip cooling

Answer 81

B. Machined cooling ring

Answer 82

C. Splash cooling strip

Answer 83

D. Capsule icing allocation

Answer 84

A. Tubular

Answer 85

C. Annular

Answer 86

B. Tubo-annular

Answer 87

All the above

Answer 88

A. Vaporiser

Answer 89

B. Atomiser

Answer 90

C. Both A and B are correct

Answer 91

D. Both A and B are false

Answer 92

A. compressor

Answer 93

B. Impulse Turbine

Answer 94

C. Reaction Turbine

Answer 95

A. Turbofan of low derivation

Answer 96

B. Turbofan of high derivation

Answer 97

C. Piston engines

Answer 98

D. Stratojet

Answer 99

A. Because it implies more drag inside engine

Answer 100

B. Indeed, it is a really efficient method, especially in military aviation

Answer 101

Because of increment in thrust, that is proportional to (√T_PC)/(√T_NoPC )

Answer 102

D. Because the increment in thrust follows a linear gradient, so that is not too much.

Answer 103

A. Afterburning provides the best method of thrust augmentation for short periods.

Answer 104

B. Afterburning provides the worst method of thrust augmentation for short periods.

Answer 105

C. Afterburning provides the best method of thrust augmentation for long periods.

Answer 106

D. Afterburning provides the worst method of thrust augmentation for long periods.

Answer 107

A. It is a method of augmenting the basic thrust of an engine.

Answer 108

B. For military aircraft improve combat performance

Answer 109

C. It is the worst method of thrust augmentation for short periods.

Answer 110

D. A and B are correct

Answer 111

A. The nozzle expands

Answer 112

B. the nozzle contracts

Answer 113

C. the nozzle stays fixed

Answer 114

D. the nozzle opens and closes periodically

Answer 115

A. low derivation

Answer 116

B. high derivation

Answer 117

C. turboreactors

Answer 118

D. a and b are correct

Answer 119

A. Commercial planes

Answer 120

B. Fighters planes

Answer 121

C. None of the above

Answer 122

D. Helicopters

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semana Carol segundo parcial

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Question 7

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Question 9

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Question 11

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Question 13

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Question 24

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Question 27

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Question 29

Question 30

Question 31

Question 32

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	Created by Ismael Vázquez over 6 years ago