Thermodynamics
56 Questions
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Questions on heat and thermodynamics for Principles of Engineering
Questions and Answers
- 1.
- A.
Conduction
- B.
Radiation
- C.
Expansion
- D.
Convection
- 2.All matter is composed of particles that are in constant, random motion. Because of this motion, the particles have ? energy.
- 3.The quantity that tells how hot or cold something is compared to a standard is ? and it is related to the average kinetic energy of a substance.
- 4.The temperature scale that assigns 0 degrees to the freezing point of water and 100 degrees to the boiling point of water is the ? scale.
- 5.The SI scale of temperature used in scientific research is the ? scale.
- 6.If two objects are at the same temperature, the particles in both substances have the same ? kinetic energy.
- 7.Nearly all forms of matter ? when heated due to the fact that the particles will move faster and tend to move farther apart, on the average.
- 8.Which of the following is NOT a unit of heat?
- A.
Fahrenheit
- B.
Joule
- C.
Calorie
- D.
British thermal unit
- 9.Besides kinetic energy, molecules have rotational kinetic energy, potential energy due to forces between molecules and more. The total of all energies inside a substance is called ? energy.
- 10.When heat flows from one object or substance to another it is in contact with, the substances are said to be in ? contact.
- 11.When objects are in thermal contact, heat will flow until they are at the same temperature, a condition known as ? ?
- 12.A thermometer comes to thermal equilibrium with whatever it is place in, therefore a thermometer actually registers its own temperature.
- A.
True
- B.
False
- 13.On the Fahrenheit scale, water freezes at ? degrees.
- A.
0
- B.
32
- C.
36
- D.
38
- 14.On the Fahrenheit scale, water boils at ? degrees.
- A.
212
- B.
100
- C.
180
- D.
220
- 15.Two strips of different metals, permanently bonded together, will curve when heated due to the different ? rates of the metals.
- 16.The term for two metals bonded together that curve when heated is a ? strip.
- 17.A device in the home that uses a bimetallic strip to turn on or to turn off the furnace is called a ?
- 18.Which has more internal energy, a bathtub full of cool water or a cup of hot water?
- A.
Bathtub full of cool water
- B.
Cup of hot water
- 19.If a piece of aluminum is placed in contact with both a bathtub full of cool water and a cup of hot water, which way will heat flow?
- A.
From the cup to the bathtub
- B.
From the bathtub to the cup
- 20.If heat flows from a cup of hot water to a bathtub full of cool water, the water in the cup will have a loss in ? energy while the water in the tub will have an increase in ? energy.Write just one answer, it is the same for both question marks.
- A.
Thermal
- B.
Heat
- C.
Internal
- 21.If heat flows from a cup of hot water to a bathtub full of cool water, the temperature gain of the water in the tub will be ? the temperature change of the water in the cup.
- A.
The same as (but opposite sign)
- B.
Greater than (but opposite sign) than
- C.
Smaller than (but opposite sign) than
- 22.The transfer of heat between materials that are in direct contact is called ?
- 23.Conduction takes place very easily in metals primarily because metals have very "loose" outer ? in their atoms that can drift through the metal and jostle other particles.
- 24.A very poor conductor such as wood or styrofoam is known as an ? because they delay the transfer of heat.
- 25.Air is a good conductor.
- A.
True
- B.
False
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