18 颗豆豆
1. 单选题
20 秒
In the following, which one is NOT a turbomachine
ventilation
pump
aeroengine
wind turbine
2. 单选题
20 秒
What is an essential element of a turbomachine?
stator
rotor
working fluid
stage
3. 单选题
30 秒
Turbomachines transfer energy between ___ and ____
rotors, working fluid
rotors or a rotor, air
stators, working fluid
rotors, stators
4. 单选题
20 秒
Which machine imparts energy into working fluid?
water turbine
pump
steam turbine
wind turbine
5. 单选题
30 秒
Choose the one different from the rest.
axial flow turbomachines
radial flow turbomachines
mixed flow turbomachines
aeronautical turbomachines
6. 单选题
30 秒
Choose the one different from the rest.
propeller
ceiling fan
wind turbine
steam turbine
7. 单选题
20 秒
Choose the one different from the rest.
wind turbine
ventilation
electric fan
steam turbines
8. 单选题
20 秒
Which one is not part of an aeroengine?
fan
compressor
turbine
steam turbine
9. 单选题
20 秒
How many stages does an aeroengine compressor have
about 10
about 20
about 40
about 50
10. 单选题
20 秒
Which country was the first to use turbomachines?
China
Rome
Egypt
India
11. 单选题
30 秒
What is the first turbomachine being used by human
steam turbine
impulse turbine
water turbine
water wheel
12. 单选题
60 秒
Pressure__through the rotor of an impulse turbine.
remains unchanged
increases
decreases
can increase or decrease
13. 单选题
60 秒
Pressure__through the rotor of a reaction turbine.
remains unchanged
increases
decreases
can increase or decrease
14. 单选题
20 秒
Who developed the Euler's turbine equation?
Giovanni Branca
Taqi-al-Din
Leonhard Euler
Von Karmann
15. 单选题
30 秒
Which one is the most difficult to design?
a centrifugal compressor
a multi-stage compressor
a multi-stage turbine
a centrifugal turbine
16. 单选题
20 秒
Why is compressor more difficult to design?
it is longer
reverse pressure gradient
it is more expensive
it needs more time
17. 单选题
20 秒
Why is turbine easier to design?
it is longer
favorable pressure gradient
it is cheaper
it has fewer stages
18. 单选题
20 秒
Which of the following does not have turbomachines
hair dryer
blower
roll-coaster
turbocharger
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