"Heat Engine" Utilization of Internal Energy PPT Teaching Courseware

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"Heat Engine" Utilization of Internal Energy PPT Teaching Courseware

Part One Content: A Classification Practice of Knowledge Key Points

Knowledge point 1 Heat engine

1. As shown in Figure 14-1-1, put some water in the test tube, plug it with a rubber stopper, and heat the water until it boils. What you will see is the rubber stopper __________. The energy conversion process in this experiment: the ____________ energy of the fuel is converted into ______ energy through combustion, and ______ energy is converted into ________ energy through work. Using the principle of internal energy work, ________ can be made.

2. A heat engine in which fuel is burned directly in the engine cylinder to produce power is called ________. It can be divided into two categories: ________ and ________.

3. Among the four means of transportation shown in Figure 14-1-2, the one that does not use a heat engine as a power machine is ()

Knowledge point 2 Gasoline engine

4. When a gasoline engine is working, the piston reciprocates in the cylinder. The movement of the piston from one end of the cylinder to the other is called a ________. A working cycle of most gasoline engines consists of ________ strokes, which are ____________, ____________, ____________, and ____________.

5. Figure 14-1-3 is a schematic diagram of the four strokes of a single-cylinder four-stroke gasoline engine. Regarding the order of the four strokes in one working cycle of this gasoline engine, the correct one is ()

A. C, D, B, A

B． B, D, A, C

C. B, A, D, C

D. A, B, C, D

6. The following flow chart is used to illustrate a working cycle of a single-cylinder four-stroke gasoline engine and the main energy conversion situations involved. The correct supplement to ①②③④ in the picture is ()

A. ① Power stroke ② Internal energy is converted into mechanical energy ③ Compression stroke ④ Mechanical energy is converted into internal energy

B． ① Compression stroke ② Internal energy is converted into mechanical energy ③ Power stroke ④ Mechanical energy is converted into internal energy

C. ① Compression stroke ② Mechanical energy is converted into internal energy ③ Power stroke ④ Internal energy is converted into mechanical energy

D. ① Power stroke ② Mechanical energy is converted into internal energy ③ Compression stroke ④ Internal energy is converted into mechanical energy

Heat engine PPT, the second part of the content: Comprehensive training of the B law method

10. Essentially, the working energy of an internal combustion engine comes from ()

A. Mechanical energy

B． Internal energy

C. chemical energy

D. chemical energy and internal energy

11． Figure 14-1-5 shows some conditions of the cylinder in one cycle when the gasoline engine is working. The following statement is correct ()

A. Figure A shows the compression stroke of a gasoline engine

B． In Figure B, the only working substance sucked into the cylinder is gasoline.

C. The stroke shown in Figure C is completed by the inertia of the flywheel.

D. Converting internal energy into mechanical energy in Tuding

12. During the compression stroke of a gasoline engine, the changes in temperature, pressure, and volume of the air in the cylinder should be ()

A. Temperature increases, pressure decreases, volume increases

B． Temperature decreases, pressure decreases, volume decreases

C. Temperature increases, pressure increases, volume decreases

D. Temperature decreases, pressure decreases, volume increases

13. Figure 14-1-6 shows a schematic diagram of a certain stroke in the operation of a certain automobile engine. During this process, the gas in the cylinder ()

A. Density decreases

B． Internal energy converted into mechanical energy

C. Internal energy decreases

D. Thermal movement of molecules accelerates

14. As shown in Figure 14-1-7A, use an alcohol lamp to heat the water in the test tube. When the water boils for a period of time, the plug is pushed out by the water vapor in the test tube. The ________ of the water vapor can be converted into the ________ of the plug. Yes, based on this principle, people have created a heat engine; Figure B shows a certain stroke of a gasoline engine, which is the ________ stroke of a gasoline engine.

Heat engine PPT, the third part: practical practice of C high-frequency examination questions

18. [2017·Hangzhou]As shown in Figure 14-1-9, the gasoline engine is in a certain stroke during the working process. The following description of this stroke is correct ()

A. Compression stroke, mechanical energy is converted into internal energy

B． Compression stroke, internal energy is converted into mechanical energy

C. Power stroke, mechanical energy is converted into internal energy

D. Power stroke, internal energy is converted into mechanical energy

19. [2017 · Texas The energy conversion is the same in the ________ strokes of a four-stroke gasoline engine.

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Update Time: 2024-07-22

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