Question 1

Heat energy will spontaneously always flow in the direction of ________.

Accepted Answer

A)  a higher temperature 
B)  a lower temperature 
C)  up, since heat rises 
D)  a smaller heat capacity 
A)  a higher temperature 
B)  a lower temperature 
C)  up, since heat rises 
D)  a smaller heat capacity B

Question 2

The greatest percentage of heat loss from an average house with 6-inches of fiberglass in the walls, 4-inches in the floor, 9-inches in the roof, and double pane windows, comes from the ________.

Accepted Answer

A)  roof 
B)  walls 
C)  floor 
D)  windows 
A)  roof 
B)  walls 
C)  floor 
D)  windows D

Question 3

At a restaurant you are served coffee before you are ready to drink it. In order that the coffee be the hottest when you are ready for it, when would it be best to add cream (at room temperature) to it?

Accepted Answer

A)  when you are ready to drink it 
B)  right when you are served the coffee 
C)  it doesn't matter, as the final temperature will be the same 
A)  when you are ready to drink it 
B)  right when you are served the coffee 
C)  it doesn't matter, as the final temperature will be the same B

Question 4

The most cost effective way to reduce heat loss from a window is ________.

Accepted Answer

A)  add a storm window 
B)  install a triple pane window 
C)  weatherstrip around the outside perimeter of the window 
D)  install a thermal drape 
A)  add a storm window 
B)  install a triple pane window 
C)  weatherstrip around the outside perimeter of the window 
D)  install a thermal drape

Question 5

For a furnace to provide 50,000 Btu/hr of thermal energy to a living space, what should the rate of heat supplied by the fuel if the furnace efficiency is 75%?

Accepted Answer

A)  25,000 
B)  37,000 
C)  50,000 
D)  67,000 
E)  125,000 Btu/hr 
A)  25,000 
B)  37,000 
C)  50,000 
D)  67,000 
E)  125,000 Btu/hr

Question 6

The R-value of a piece of material goes up if the material is

Accepted Answer

A)  thicker 
B)  a better conductor 
C)  covering a larger area 
D)  thinner 
A)  thicker 
B)  a better conductor 
C)  covering a larger area 
D)  thinner

Question 7

Which of the following situations would be allowed by the second law of thermodynamics?

Accepted Answer

A)  running of a heat engine using temperature differences in the oceans 
B)  converting 100 joules of heat energy into 100 joules of work 
C)  passage of heat from the freezer into the refrigerator section 
D)  the reduction of waste heat from a power plant to zero with better technology 
A)  running of a heat engine using temperature differences in the oceans 
B)  converting 100 joules of heat energy into 100 joules of work 
C)  passage of heat from the freezer into the refrigerator section 
D)  the reduction of waste heat from a power plant to zero with better technology

Question 8

Heat is ________.

Accepted Answer

A)  a measure of the average kinetic energy of molecules in an object 
B)  a property of an object 
C)  the energy transferred between bodies due to a temperature difference 
D)  the specific heat of an object 
A)  a measure of the average kinetic energy of molecules in an object 
B)  a property of an object 
C)  the energy transferred between bodies due to a temperature difference 
D)  the specific heat of an object

Question 9

The flow of heat in a cold soft drink will be from ______.

Accepted Answer

A)  the drink to the ice cubes 
B)  the drink to the outside air 
C)  the drink to the glass 
D)  the ice cubes to the drink 
A)  the drink to the ice cubes 
B)  the drink to the outside air 
C)  the drink to the glass 
D)  the ice cubes to the drink

Question 10

The greatest source of heat loss in a new home is from the ________.

Accepted Answer

A)  roof 
B)  walls 
C)  floor 
D)  windows 
E)  infiltration 
A)  roof 
B)  walls 
C)  floor 
D)  windows 
E)  infiltration

Question 11

What color would you select for a container that will hold ice cubes such that the ice is preserved the longest?

Accepted Answer

A)  white 
B)  black 
C)  green 
D)  color doesn't matter 
A)  white 
B)  black 
C)  green 
D)  color doesn't matter

Question 12

Coffee will cool faster when put into a saucer due to

Accepted Answer

A)  conduction 
B)  evaporation 
C)  condensation 
D)  a and b 
E)  b and c 
A)  conduction 
B)  evaporation 
C)  condensation 
D)  a and b 
E)  b and c

Question 13

The maximum efficiency of a heat engine operating between 2$\degree$C and 200$\degree$C will
Be about ________.

Accepted Answer

A)  10% 
B)  40% 
C)  60% 
D)  90% 
E)  100% 
A)  10% 
B)  40% 
C)  60% 
D)  90% 
E)  100%

Question 14

For a cube-shaped room, 10 ft on a side, what will be the rate of heat loss if the R-value is 4 ft2-$\degree$F-hr/Btu for each side and the $\Delta$T is 50 F?

Accepted Answer

A)  800 
B)  1200 
C)  5000 
D)  7500 
E)  12,000 Btu/hr 
A)  800 
B)  1200 
C)  5000 
D)  7500 
E)  12,000 Btu/hr

Question 15

The "R-value" of material is not related to its ________.

Accepted Answer

A)  composition 
B)  area 
C)  thickness 
D)  resistance to heat flow 
A)  composition 
B)  area 
C)  thickness 
D)  resistance to heat flow

Question 16

Your feet feel warmer on a rug than on a tile floor because the rug

Accepted Answer

A)  is usually warmer than the tile 
B)  is a better insulator than tile 
C)  has more internal energy than tile for the same mass 
D)  all of these 
A)  is usually warmer than the tile 
B)  is a better insulator than tile 
C)  has more internal energy than tile for the same mass 
D)  all of these

Question 17

Since the rate of heat transfer by conduction is proportional to the $\Delta$T, what percent savings in your heating bill would you expect if you turned the thermostat down from 75 $\degree$ to 65 $\degree$ , and the outside temperature is 25 $\degree$F?

Accepted Answer

A)  10% 
B)  20% 
C)  30% 
D)  40% 
E)  50% 
A)  10% 
B)  20% 
C)  30% 
D)  40% 
E)  50%

Question 18

Hot water in a _______ can will cool off faster than hot water in any other color can.

Accepted Answer

A)  white 
B)  red 
C)  black 
D)  silver 
A)  white 
B)  red 
C)  black 
D)  silver

Question 19

The primary method by which the water in a pot is heated is by ________.

Accepted Answer

A)  conduction 
B)  convection 
C)  radiation 
D)  evaporation 
E)  condensation 
A)  conduction 
B)  convection 
C)  radiation 
D)  evaporation 
E)  condensation

Question 20

How much heat does it take to increase the temperature of 5 lbs of water by 20$\degree$F?

Accepted Answer

A)  4 
B)  25 
C)  100 
D)  800 Btu. 
A)  4 
B)  25 
C)  100 
D)  800 Btu.

Heat energy will spontaneously always flow in the direction of ________.

The greatest percentage of heat loss from an average house with 6-inches of fiberglass in the walls, 4-inches in the floor, 9-inches in the roof, and double pane windows, comes from the ________.

At a restaurant you are served coffee before you are ready to drink it. In order that the coffee be the hottest when you are ready for it, when would it be best to add cream (at room temperature) to it?

The most cost effective way to reduce heat loss from a window is ________.

For a furnace to provide 50,000 Btu/hr of thermal energy to a living space, what should the rate of heat supplied by the fuel if the furnace efficiency is 75%?

The R-value of a piece of material goes up if the material is

Which of the following situations would be allowed by the second law of thermodynamics?

Heat is ________.

The flow of heat in a cold soft drink will be from ______.

The greatest source of heat loss in a new home is from the ________.

What color would you select for a container that will hold ice cubes such that the ice is preserved the longest?

Coffee will cool faster when put into a saucer due to

The maximum efficiency of a heat engine operating between 2 $\degree$ C and 200 $\degree$ C will Be about ________.

For a cube-shaped room, 10 ft on a side, what will be the rate of heat loss if the R-value is 4 ft2- $\degree$ F-hr/Btu for each side and the $\Delta$ T is 50 F?

The "R-value" of material is not related to its ________.

Your feet feel warmer on a rug than on a tile floor because the rug

Since the rate of heat transfer by conduction is proportional to the $\Delta$ T, what percent savings in your heating bill would you expect if you turned the thermostat down from 75 $\degree$ to 65 $\degree$ , and the outside temperature is 25 $\degree$ F?

Hot water in a _______ can will cool off faster than hot water in any other color can.

The primary method by which the water in a pot is heated is by ________.

How much heat does it take to increase the temperature of 5 lbs of water by 20 $\degree$ F?

Introduction

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Air Pollution, Global Warming, and Fossil Fuels

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Exam 3: Heat

Heat energy will spontaneously always flow in the direction of ________.

The greatest percentage of heat loss from an average house with 6-inches of fiberglass in the walls, 4-inches in the floor, 9-inches in the roof, and double pane windows, comes from the ________.

At a restaurant you are served coffee before you are ready to drink it. In order that the coffee be the hottest when you are ready for it, when would it be best to add cream (at room temperature) to it?

The most cost effective way to reduce heat loss from a window is ________.

For a furnace to provide 50,000 Btu/hr of thermal energy to a living space, what should the rate of heat supplied by the fuel if the furnace efficiency is 75%?

The R-value of a piece of material goes up if the material is

Which of the following situations would be allowed by the second law of thermodynamics?

Heat is ________.

The flow of heat in a cold soft drink will be from ______.

The greatest source of heat loss in a new home is from the ________.

What color would you select for a container that will hold ice cubes such that the ice is preserved the longest?

Coffee will cool faster when put into a saucer due to

The maximum efficiency of a heat engine operating between 2 °\degree° C and 200 °\degree° C will Be about ________.

For a cube-shaped room, 10 ft on a side, what will be the rate of heat loss if the R-value is 4 ft2- °\degree° F-hr/Btu for each side and the Δ\DeltaΔ T is 50 F?

The "R-value" of material is not related to its ________.

Your feet feel warmer on a rug than on a tile floor because the rug

Since the rate of heat transfer by conduction is proportional to the Δ\DeltaΔ T, what percent savings in your heating bill would you expect if you turned the thermostat down from 75 °\degree° to 65 °\degree° , and the outside temperature is 25 °\degree° F?

Hot water in a _______ can will cool off faster than hot water in any other color can.

The primary method by which the water in a pot is heated is by ________.

How much heat does it take to increase the temperature of 5 lbs of water by 20 °\degree° F?

Introduction

Energy Mechanics

Solar Energy

Air Pollution, Global Warming, and Fossil Fuels

Electricity

Nuclear

Biomass

Filters

The maximum efficiency of a heat engine operating between 2 $\degree$ C and 200 $\degree$ C will Be about ________.

For a cube-shaped room, 10 ft on a side, what will be the rate of heat loss if the R-value is 4 ft2- $\degree$ F-hr/Btu for each side and the $\Delta$ T is 50 F?

Since the rate of heat transfer by conduction is proportional to the $\Delta$ T, what percent savings in your heating bill would you expect if you turned the thermostat down from 75 $\degree$ to 65 $\degree$ , and the outside temperature is 25 $\degree$ F?

How much heat does it take to increase the temperature of 5 lbs of water by 20 $\degree$ F?