سوالات ودرک مطلب زبان انگلیسی

A

11. Reciprocate a. turn especially by the use of force

12. Dislodge b. cause to move round a central point

13. Kerosene c. force something out from its place

14. Originate d. force of attraction between any two objects

15. Rotate e. oil obtained from petroleum used as fuel

16. Twist f. move backward and forward

g. come into being, start, begin

B

17. A stretched rubber band has kinetic energy.

18. Everything that is falling has no weight.

19. Atoms are particles that are smaller than molecules.

20. Most of the oilfields of the world are near the seas and oceans of today.

21. Petrol easily vaporizeswhile grease doesn t.

22. Heavy oils are used in gasoline engines and finer oils are used in

locomotives.

23. Petrol is taken to a refinery and crude oil comes out.

24. Airplanes were invented when gasoline engines were invented.

25. The efficiency of a steam engine is about %25.

26. Fuel-air mixture is ignited by a spark plug in an internal combustion

engine.

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2 %5

27. Oil should be of proper if wewant to reduce friction between

two objects.

28.When the steamis water isthe result.

29. Reciprocating movement of piston turnsto a rotarymotion in .

30. When the gasisignited the fire instantly all through the

charge.

31. Alcohol iseasily whilewood takesmore time to burn.

D

32. Name the four strokes of an internal combustion engine.

.

33. Name two main uses of oil.

..

34. All energy in the world is of two main kinds, what are they?

.

35. How is the downward motion of piston transformed into the rotational

movement of a crankshaft?

E

2

36. Themore I thought about the plan, I liked it.

a. less than b. the least c. as little as d. the less

37. I wish I ..harder for the test last week.

a. studied b. had studied c. would study d. study

38. I shouldn t have lost my temper, ?

a. should b. shouldn t me c. should you d. should I

39. I didn t repair the car myself, I got amechanic it.

a. repair b. repaired c. to repair d. repairing

F.

40. The scientific Law of Conversion of Mass-Energy states that there is a

fixed amount of matter or of energy in the universe.

41. Kinetic energy is the force embodied in the moving objects.

42. A machine in the tower gradually cuts a narrow hole down into the

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ground.

43. We cannot see the oil trapped deep down in the ground.

44. The gasses which are formed in the cylinder by the combustion of the

mixture expand and do the work which runs the engine.

45. The burned gases are removed from the cylinder through the exhaust

and fresh charge is sucked in.

H

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