11. Temperatures expressed in the Kelvin scale are higher than temperatures in the Celsius scale. A) 283°
B) 273°
C) 200°
D) 460°

12. 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.

13. A temperature of 20°C is equivalent to approximately
A) 68°F
B) –6°F
C) 136°F.
D) 32°F

14. Which process can you blame if you burn your finger on a metal utensil sitting in a pot of extremely hot water?
A) Combustion
B) Conduction
C) Radiation
D) Reflection

15. Which of the following solid fuels has the highest heating value?
A) Lignite
B) Coke
C) Wood
D) Bituminous coal

16. If a substance forms crystals when it solidifies, its points are the same.
A) melting and freezing
B) evaporation and freezing
C) melting and condensation
D) evaporation and condensation

17. If the gauge pressure of a gas is 114 kPa, what is the absolute pressure?
A) 50 kPa
B) 214 kPa
C) 220 kPa
D) 14 kPa

18. Which of the following takes place in the combustion chamber of a gas turbine engine?
A) Fuel oil is mixed with a proper portion of compressed air.
B) Fuel oil is stored with sufficient pressure.
C) A glow plug is used to add enough heat to the chamber for combustion to occur.
D) Gaseous combustion products are cooled to a desired temperature.

19. The main difference between heat and temperature is that temperature is solely dependent on the
A) velocity of molecules within a body.
B) state of matter.
C) mass of a body.
D) composition of a body.

20. For combustion to occur, what needs to happen?
A) Oxygen is removed from the area.
B) A fuel sits in the presence of a small amount of oxygen.
C) The ignition point for a given fuel is met.
D) The temperature of the fuel is lowered.