1.What type of engine was used first in aviation? * turbofan engine
piston engine
turboprop engine
2.How many categories can be divided the different types of airplane engines? *
into three
into five
into six
3.What are the three categories of different types of airplane engines? *
turbofan, pulse, rocket
uncomplicated, ram, bypass
piston, jet, turboprop
4.What's the purpose of airplane engines? *
to provide lift to push an aircraft through the air and overcome the force of drag
to provide thrust to push an aircraft through the air and overcome the force of drag
to provide drag to push an aircraft through the air and overcome the force of drag
5.What are the parts of piston engine? *
cylinder case, head, cylinders, piston, crankshaft, landing gear
cylinder case, head, cylinders, piston, crankshaft, gear box
cylinder case, head, cylinders, piston, crankshaft, piston rods, etc.
6.When did piston aircraft engines reach their zenith? *
during World War II
in XXI century
during World War I
7.How are the aircraft engines classified? *
reciprocating and gas tubine
turbine and gas tubine
rocket and gas tubine
8.Who first installed the internal combustion engine on an aircraft? *
Wright brothers
L. Blerio
N. Nesterov
9.Which engines were the only type of aircraft engine until 1939? *
piston engines
jet engines
2. the Kurzanov Family visited us yesterday.
3. This is miss Jones, she's a doctor.
4. If you feel bad, go see a doctor
5. Take the ball that has Ronaldo's autograph on it.
6. We do exercises in the morning.
7. Thank you, mom, the dinner was very delicious.
8. Remember that the healthy should take care of the sick.
9. I love the Carpathians in summer.
10. I'd like to live near the don.
11. You know Tom brown?
12. The third task is the translation of the text.
13. He has never been to the US.
14. He said that he saw a hedgehog yesterday.
15. How do you like the Mediterranean?
1. The moon is beautiful tonight.
2. the Kurzanov Family visited us yesterday.
3. This is miss Jones, she's a doctor.
4. If you feel bad, go see a doctor
5. Take the ball that has Ronaldo's autograph on it.
6. We do exercises in the morning.
7. Thank you, mom, the dinner was very delicious.
8. Remember that the healthy should take care of the sick.
9. I love the Carpathians in summer.
10. I would like to live near the don.
11. Do you know Tom brown?
12. The third task is the translation of the text.
13. He has never been to the US.
14. He said that he saw a hedgehog yesterday.
15. How do you like the Mediterranean?
Объяснение: