96. SEMANAS 2018

Question 1 of 24

1

Q1. Which of the following are lubricating oil types?

Select one of the following:

Straight mineral oil
Ashless dispersant oil
Synthetic oil
All of them are correct

Explanation

Question 2 of 24

1

Q2. Which of the following statements are correct?

Select one of the following:

Wet sump lubrication system stores the oil in a reservoir inside the engine.
Dry sump lubrication system pumps the oil from the engine ́s crankcase to an external tank that stores oil.
A and B are true
A and B are false

Explanation

Question 3 of 24

1

Q3. Which of the following statements is incorrect?

Select one of the following:

Oil absorbs heat from the engine components and dissipates to the atmosphere through a heat exchanger
Sealing is one of the functions of engine oil
Engine oil increases friction created between the moving parts of the engine
All of them

Explanation

Question 4 of 24

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Q4. What does ‘W’ means referring to oils?

Select one of the following:

Wide ratio of uses
Wide ratio of temperatures
It is specially designed for airplanes
It is specially prepared for winter

Explanation

Question 5 of 24

1

Q5. One of the following statements is vital for aviation (regarding to lubrication system)

Select one of the following:

It must work properly in every altitude or atmospheric conditions
It doesn’t need an element to cool the lubricant
Oil leakages are not important
None of them are true

Explanation

Question 6 of 24

1

Q6. Which of these is not part of the lubrication system?

Select one of the following:

Pressure pump
Crankcase
Filters
Oil tank

Explanation

Question 7 of 24

1

Q7. Excessive heat in engine operation...

Select one of the following:

Affects the behavior of the combustion with the possibility of detonations
Shortens the life of the engine
Impairs lubrication
All of them are true

Explanation

Question 8 of 24

1

Q8. Which of these is a disadvantage of Cowl Flaps?

Select one of the following:

They control the airflow
They increase the performances of the engine
They increase drag
None of them are disadvantages

Explanation

Question 9 of 24

1

Q1. A fixed pitch propellers...

Select one of the following:

A. For a fixed blade angle, variations in TAS (or RPM) implies variation of the angle of attack
B. For a fixed blade angle, variations in TAS (or RPM) do not implies variation of the angle of attack
C. The propeller can be optimized for several flight conditions
D. AandCaretrue

Explanation

Question 10 of 24

1

Q2. In variable pitch propeller aircrafts...

Select one of the following:

Pilot uses fine pitch during cruise
Pilot uses coarse pitch in take off
Pilot uses fine pitch during takeoff because more power is needed
All are false

Explanation

Question 11 of 24

1

Q3. In constant speed propellers...

Select one of the following:

A. The pitch setting must be modified by the pilot during the flight to maintain a determined constant rotational speed
B. The pitch setting varies automatically during the flight to maintain a determined constant rotational speed
C. The pilot actuates directly in the governor to control the blade angle variation
D. A and C are true

Explanation

Question 12 of 24

1

Q4. The Constant Speed Unit (CSU) is used in

Select one of the following:

Piston engines
Turboprop
Both of them
None of them

Explanation

Question 13 of 24

1

Q5. With a pre-selected RPM, pilot decides to descent

Select one of the following:

It is an overspeed condition, so flyweights tilt outwards and raise pilot valve which introduces oil to increase propeller pitch and lower engine RPM
It is an underspeed condition, so flyweights tilt outwards and raise pilot valve which introduces oil to increase propeller pitch and lower engine RPM
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
None of them

Explanation

Question 14 of 24

1

Q6. With a pre-selected RPM, pilot decides to ascent

Select one of the following:

It is an overspeed condition, so flyweights tilt outwards and raise pilot valve which introduces oil to increase propeller pitch and lower engine RPM
It is an underspeed condition, so flyweights tilt outwards and raise pilot valve which introduces oil to increase propeller pitch and lower engine RPM
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
None of them

Explanation

Question 15 of 24

1

Q7. Regarding to icing in blades...

Select one of the following:

A. A good propeller de-icing could be resistance heating elements
B. It causes aerodynamic shape lost
C. Due to the propeller's high spin velocity, icing in blades is not common
D. A and B are true

Explanation

Question 16 of 24

1

Q8. Regarding to propellers

Select one of the following:

A. Propellers are better propellants than jet engines
B. Propellers are worse propellants than jet engines
C. Propellers are not good a high cruising speed due to excessive velocities in blade's tips
D. A and C are true

Explanation

Question 17 of 24

1

Q1. Which was the first jet-powered aircraft?

Select one of the following:

Spitfire
Junkers Ju 87
Bell P-59
Heinkel He-178

Explanation

Question 18 of 24

1

Q2. Why was the aircraft Gloster Meteor so popular?

Select one of the following:

It was the first jet-powered aircraft.
It was the first aircraft to break the sound barrier.
It was the first aircraft with sufficient speed to attack the German V1 flying bomb.
It was the first aircraft that could perform sustained inverted flight.

Explanation

Question 19 of 24

1

Q3. The engine Jumbo 004B was a milestone in the turbojet engine because...

Select one of the following:

It had the first axial compressor in a turbojet engine.
It had the biggest change of pressure in one stage up until then.
It was the most produced engine in the WWII.
All the answers are false.

Explanation

Question 20 of 24

1

Q4. Mark the right answer:

Select one of the following:

A turboprop produces more impulse than a turbojet.
A low-BPR turbofan has a bigger SFC than a high-BPR turbofan in low speeds.
A turboprop has a bigger SFC than a turbojet in low speeds.
A turboprop has the least SFC at any speed.

Explanation

Question 21 of 24

1

Q5. Which statement is true?

Select one of the following:

Axial compressor is a compressor in which the gas or working fluid principally flows parallel to the axis of rotation
Centrifugal compressor is a compressor in which the gas or working fluid principally flows with a radial component through the compressor.
A and B are correct
None of the above

Explanation

Question 22 of 24

1

Q6. In jet engines with greater impulse (I):

Select one of the following:

Large size.
Smaller size.
The division between thrust (E) and airflow (G) is lower
None of the above

Explanation

Question 23 of 24

1

Q7. The specific fuel consumption (SFC) is:

Select one of the following:

E (thrust) / G (airflow)
c (consumption) / E (thrust)
G (airflow) / E (thrust)
G (airflow) / c (consumption)

Explanation

Question 24 of 24

1

Q8. In turbofan the bypass ratio is:

Select one of the following:

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

	Created by Ismael Vázquez over 6 years ago