CHOWS UNIT 2

Question 1

P1 XV1 = P2 X V2

Answer 1

BOYLES LAW

Question 2

PTOTAL = PSUBSTANCE 1 + PSUBSTANCE 2

Answer 2

DALTONS LAW

Question 3

V1/T1 = V2/T2

Answer 3

CHARLES LAW

Question 4

MATCH THE FOLLOWING TERMS WITH THEIR PROPER UNITS AND/OR FORMULAS

Answer 4

A. SPECIFIC VOLUME - FT3/LB
B. HP - 33,000 FT-LB/MIN
C. SPECIFIC GRAVITY - NO UNITS
D. DENSITY - LB/FT3
E. 1 kW - 3413 BTU
F. WORK - FORCE X DISTANCE

Question 5

ONE WATT OF ELECTRICAL ENERGY IS EQUAL TO….

Answer 5

3,413 BTU

Question 6

THE VOLUME OF GAS VARIES INVERSELY WITH THE ABSOLUTE PRESSURE, PROVIDED THE TEMPERATURE REMAINS CONSTANT. THAT IS CALLED…

Answer 6

BOYLES LAW

Question 7

A SOLID MATERIAL EXERTS A PRESSURE OR FORCE ___

Answer 7

DOWNWARD ONLY

Question 8

HOW MANY WATTS OF ELECTRICAL POWER IS EQUAL TO 1 HORSEPOWER?

Answer 8

746

Question 9

IF THE TEMPERATURE REMAINS CONSTANT AND THE VOLUME THAT A GAS OCCUPIES INCREASES, THE PRESSURE WILL ________

Answer 9

DECREASE

Question 10

A VAPOR MATERIAL EXERTS A PRESSURE OR FORCE

Answer 10

IN ALL DIRECTIONS

Question 11

AT A CONSTANT PRESSURE, THE VOLUME OF A GAS VARIES AS TO THE ABSOLUTE TEMPERATURE AND AT A CONSTANT VOLUME THE PRESSURE OF THE GAS VARIES DIRECTLY WITH THE ABSOLUTE TEMPERATURE. THIS IS KNOWN AS ______

Answer 11

CHARLES LAW

Question 12

THE UNIT USED TO MEASURE THE ELECTRICAL POWER IS THE….

Answer 12

WATT

Question 13

A helicopter is lifting a 800 pound unit at a rate of 200 ft./min. How many horsepower of work energy is the helicopter using in the process?

Answer 13

4.848 HP

Question 14

A liquid material exerts, a pressure or force______

Answer 14

Outward and downward

Question 15

The total pressure of a confined mixture of gases is the sum of the pressure of each of the gases in the mixture. This is known as……

Answer 15

DALTONS LAW

Question 16

True or false a law of conservation of energy states that energy is neither created nor destroyed

Answer 16

TRUE

Question 17

True or false as heat is applied to a close container containing a gas, the pressure inside the container will decrease

Answer 17

False

Question 18

True or false an example of a fossil fuel is hydrogen

Answer 18

False

Question 19

True or false specific volume is the term used to indicate the space a weight of gas will occupy

Answer 19

True

Question 20

True or false heat is a form of energy because of the motion of molecules

Answer 20

True

Question 21

The law that states that energy is neither created or destroyed, but can be converted from one form to another is called the

Answer 21

Law of conservation of energy

Question 22

One hp of work energy equals the amount of work done when lifting__________ pounds to the height of__________ foot in _________ minute

Answer 22

33,000/1 ft./1 minute

Question 23

Most of the energy we use comes from something we already have on earth. The only new energy we get comes from the.

Answer 23

Sun

Question 24

A material that occupy space and has mass is called

Answer 24

Matter

Question 25

The unit of measurement of electrical power is the

Answer 25

WATTAGE

Question 26

The three basic states of matter are

Answer 26

Solid liquid and gas

Question 27

__________ FT/LB of work is accomplished when an 800 pound condensing unit is lifted to the top of a 40 foot building

Answer 27

32,000

Question 28

Define power

Answer 28

THE RATE OF DOING WORK

Question 29

Define a molecule

Answer 29

The accumulation of atoms within a substance

Question 30

1 pound of ice at 20°F exerts its forced downward. After absorbing 200 BTUs, what direction will the force be exerted? After absorbing 2000 BTUs?

Answer 30

After 200 BTUs, the ice will turn into a liquid and exert force downward and outward. After 2000 BTUs, the water will turn into a vapor and exert force in all directions.

Question 31

Define an atom

Answer 31

the smallest form of a substance

Question 32

Define density

Answer 32

Density is a measure of how much mass is compressed into a specific volume D=M/V

Question 33

Define specific gravity

Answer 33

A unitless number

Question 34

Define specific volume

Answer 34

Specific volume is the space, the weight of gas or fluid will occupy in relation to its weight V= V/M

Question 35

______ is a method of converting electron flow to usable energy

Answer 35

Magnetism

Question 36

How many BTU of heat can be produced by 18 kW electric heater?

Answer 36

61,434 BTU

Question 37

On a 410a manifold gauge, what is the max working pressure of the high side gauge?

Answer 37

800 psig

Question 38

What is the density of water?

Answer 38

62.4

Question 39

What is the specific gravity of water?

Answer 39

1

Question 40

Air at standard atmospheric conditions has a density of 0.075 lbs/ft3. What would the specific volume be?

Answer 40

1/0.075 lbs =13.333 ft3/lbs

Question 41

Heat energy will travel from a _________ temperature substance to a ________ temperature substance.

Answer 41

Warmer/cooler

Question 42

True or false in 1990 President George Bush signed a clean oil act amendment that initiated, production freezes and bounds on certain popcorn oils.

Answer 42

False

Question 43

If we have an oil or gas furnace that has an output capacity of 175,000 BTU per hour and want to replace it with an electric electrical heater, how many kilowatt electric heat system would be required?

Answer 43

175000/3413 = 51.275 kW

Question 44

How many classmates are in your class?

Answer 44

23

Question 45

Too much humidity in a home during the summer causes ________, ___________, and __________. This is why it is important to have a properly sized _____________

Answer 45

Mold, bacteria, viruses, A/C

Question 46

The four major components of a vapor compression refrigeration system are the compressor, condenser, evaporator, and…..

Answer 46

Metering device