ROLLS ROYCE ENGINE`S QUESTIONS





Resultado de imagen de ROLL ROYCE AIRCRAFT ENGINE





1.What is the name for materials such as ceramics that not let heat energy pass through them?

a) Insulators
b) Conductors
c) Metals
d) Composites

2-Why can’t titanium be used to make turbine blades?

A)In temperatures over 600ºC where it rubs against other metals, it can burn
B)It is too dense and would be too heavy to use
C)It is the wrong colour
D)It is too expensive

3.Drag and drop the densities to the correct materials:

4,5g/m3 ---> Titanium 6/4
8,2g/m3 ---> Nickel Alloy
5,1g/m3 ---> Partially Yttria Stabilised Zirconia
8,4g/m3 ---> Nickel Super Alloy

4-What are the two main things engineers must consider when choosing materials to use in an engine?

A)Colour and weight
B)Cost and colour
C)Weight and name 
D)Cost and weight 

5.Which statement is true:

a) To achieve the same amount of thrust you can either accelerate a small mass of air to a high velocity or a large mass of air to a low velocity.
b) To achieve the same amount of thrust you can either accelerate a small mass of air to a small velocity or a large mass of air to a low velocity.
c) To achieve the same amount of thrust you can either accelerate a small mass of air to a high velocity or a large mass of air to a high velocity.
d) To achieve the same amount of thrust you can either accelerate a small mass of air to a low velocity or a large mass of air to a high velocity.

6-Use the ideal gas law to work out the following:If 1m3 of gas with a pressure of 1Pa and a temperature of 200k is compressed to a volume of 0.5m3 at a constant temperature what is the pressure?

A)0.5Pa
B)1Pa
C)2Pa
D)4Pa

7.Choose the correct types of energy that are wasted when fuel is used to power a jet engine:

a) Sound
b) Kinetic
c) Chemical
d) Heat
e) Light

8-Which of the following statements are true?

A)A jet engine works by making the air going through it less dense
B)A jet engine works by making the air going through it colder 
C)A jet engine works by sucking air in to pull the aeroplane forward
D)A jet engine works by pushing air out of the back of the engine which in turn pushes the engine forward

9.How are the walls of the combustor at tached to the "head" at the front of the combustor?

a) Glued in place
b) Screwed in place
c) Welded
d) Stapled together

10.What is special about the nickel alloy used in turbine blades?

a) They are grown from a single crystal of metal.
b) They are very expensive.
c) They will never melt.
d) They are made from more than one crystal of metal.

11-What is the process called that blows high pressure gas shape the sheets of titanium used to make fan blades?

A)Ordinary plastic forming
B)Superplastic Forming
C)Welding
D)Grinding

12-What is the name of the process that makes cooling holes and other features in turbine blades?

A)Drilling 
B)Electro-Discharge Machining
C)Superplastic forming
D)Wax modelling

13.Drag and drop the pressures next to the right parts of the engine:

Fan ---> 10Psi
Compressor ---> 100Psi
Combustor ---> 250Psi
Turbine ---> 60Psi

14.What is the job of the compressor?

a) Pushes a large volume of air out of the back of the engine to push the aeroplane forward.
b) Squashes the air before fuel is added.
c) Where fuel is added and burnt.
d) Takes energy from fast moving air to drive the rest of the engine.

15-How much power does a first stage turbine blade take out of the gas stream?

A)The same as a small family car 
B)5 times the power of a small family car 
C)10 times the power of a small family car
D)20 times the power of a small family car 

16-What parts of the engine does the turbine power?

A)None 
B)The fan and compressor
C)Only the fan
D)Only the compressor

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