6. Within an internal combustion engine, the can-shaped component that moves up and down the cylinder

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1 Student ID: Exam: RR - Heat When you have completed your exam and reviewed your answers, click Submit Exam. Answers will not be recorded until you hit Submit Exam. If you need to exit before completing the exam, click Cancel Exam. Questions 1 to 25: Select the best answer to each question. Note that a question and its answers may be split across a page break, so be sure that you have seen the entire question and all the answers before choosing an answer. 1. The is used to express absolute temperatures in the English system of measurement. A. Rankine scale B. Celsius scale C. Kelvin scale D. Fahrenheit scale 2. A silver bar meter long is subjected to a temperature change from 200 C to 100 C. What will be the length of the bar after the temperature change? A meter B meter C meter D meter 3. The density of water is the greatest at a temperature of A. 277 K. B. 273 K. C. 0 K. D. 4 K. 4. The amount of heat energy required to raise the temperature of a unit mass of a material one degree is A. a Joule. B. a Btu. C. absolute zero. D. its heat capacity. 5. Which of the following cools the air in a household refrigerator? A. Absorption of the heat from the air due to evaporation of the liquid refrigerant B. Reduction of the air temperature due to condensation of the gaseous refrigerant C. The transfer of heat from the air to the compressor due to expansion of the gaseous refrigerant D. The transfer of heat to the evaporator due to compression of the liquid refrigerant 6. Within an internal combustion engine, the can-shaped component that moves up and down the cylinder

2 and is the main moving part in the engine is the A. connecting rod. B. piston. C. spark plug. D. crankshaft. 7. A temperature of 200 F is equivalent to approximately A. 840 C. B. 232 C. C C. D C. 8. The process in which a substance changes from a gaseous state to the liquid state is A. evaporation. B. critical temperature. C. absolute zero. D. condensation cubic inches of a gas with an absolute pressure of 5 psi is compressed until its pressure reaches 10 psi. What is the new volume of the gas? (Assume that there's no change in temperature.) A. 10 cubic inches B. 100 cubic inches C. 40 cubic inches D. 5 cubic inches 10. A quantity of gas has a volume of 0.20 cubic meter and an absolute temperature of 333 degrees kelvin. When the temperature of the gas is raised to 533 degrees kelvin, what is the new volume of the gas? (Assume that there's no change in pressure.) A m 3 B m 3 C m 3 D m Which of the following statements correctly describes the position of the intake and exhaust valves during most of the power stage in a four-cycle gas engine? A. The intake valve is open and the exhaust valve is closed. B. The intake valve is closed and the exhaust valve is open. C. Both the intake valve and the exhaust valve are open. D. Both the intake valve and the exhaust valve are closed. 12. How much heat is required to convert 0.3 kilogram of ice at 0 C to water at the same temperature? A. 450,759 J

3 B. 100,375 J C. 334,584 J D. 167,292 J 13. What is the value of the temperature 15 degrees Celsius in degrees Kelvin? A. 258 degrees B. 455 degrees C. 288 degrees D. 475 degrees 14. Liquid alcohol will change to vapor when its temperature reaches the A. melting point. B. fusing point. C. boiling point. D. freezing point. 15. When the molecules in a body move with increased speed, it's possible that the body will change from a A. gas to a solid. B. liquid to a solid. C. gas to a liquid. D. liquid to a gas. 16. If the absolute pressure of a gas is kpa, its gage pressure is A kpa. B kpa. C kpa. D kpa. 17. A temperature of 273 K is the temperature at which water A. evaporates. B. boils. C. lacks any moving molecules. D. freezes. 18. A quantity of a gas has an absolute pressure of 400 kpa and an absolute temperature of 110 degrees kelvin. When the temperature of the gas is raised to 235 degrees kelvin, what is the new pressure of the gas? (Assume that there's no change in volume.) A kpa B. 510 kpa C kpa D kpa

4 19. Which one of the following temperatures is equal to 5 C? A. 278 K B. 41 K C. 465 K D. 0 K 20. One degree Celsius indicates the same temperature change as A. 5/9 degree Fahrenheit. B. one kelvin. C. 9/5 kelvin. D. one degree Fahrenheit. 21. The waste products of combustion leave the internal combustion engine through the A. cylinder. B. exhaust valve. C. crankshaft. D. intake valve. 22. During the stage of internal combustion engine operation in which the piston rises and compresses the fuel in the combustion chamber, A. the intake valve is open and the exhaust valve is closed. B. the exhaust valve is open and the intake valve is closed. C. both the intake and exhaust valves are open. D. both the intake and exhaust valves are closed. 23. Which of the following takes place in the combustion chamber of a gas turbine engine? A. Fuel oil is stored with sufficient pressure. B. A mixture of fuel oil and compressed air is ignited. C. Gases are cooled to a desired temperature. D. Fuel oil is mixed with a proper portion of compressed air. 24. What is the temperature 32 degrees Fahrenheit in degrees Celsius? A. 10 degrees Celsius B. 20 degrees Celsius C. 10 degrees Celsius D. 0 degrees Celsius 25. What is the length of an aluminum rod at 65 C if its length at 15 C is 1.2 meters? A meter B meter C meters D meters

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