Unit 2

Question 1

Match the gas laws with its properties

P1 x V1 = P2 x V2

Answer 1

Boyles Law

Question 2

Match the gas laws with its properties

P Total = P substance 1 + P substance 2

Answer 2

Daltons Law

Question 3

Match the gas laws with its properties

V1 / T1 = V2 / T2

Answer 3

Charles Law

Question 4

Match the following terms with the proper units and or formulas

force x distance

Answer 4

Work

Question 5

Match the following terms with the proper units and or formulas

ft3/lb

Answer 5

Specific volume

Question 6

Match the following terms with the proper units and or formulas

3413 Btu

Answer 6

1 kW

Question 7

Match the following terms with the proper units and or formulas

33000 ft-lb/min

Answer 7

Hp

Question 8

Match the following terms with the proper units and or formulas

lb/ft3

Answer 8

Density

Question 9

Match the following terms with the proper units and or formulas

No units

Answer 9

Specific gravity

Question 10

Multiple choice
One watt of electrical energy is equal to ____________.

Answer 10

3.413 Btu

Question 11

Multiple choice
The volume of gas varies inversely with the absolute pressure, provided the temperature remains constant. This is called ___________.

Answer 11

Boyles Law

Question 12

Multiple choice
How many watts of electrical power are equal to one horsepower

Answer 12

746

Question 13

Multiple choice
If the pressure remains constant, and the volume that a gas occupies increases, the pressure will ___________.

Answer 13

Decrease

Question 14

Multiple choice
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 14

Charles Law

Question 15

Multiple choice
Helicopter is lifting an 800 pound unit at a rate of 200 feet per minute. How many horsepower of work energy is the helicopter using in the process?

Answer 15

4.848 hp

800 x 200 = 160,000
160,000 / 33000 = 4.848 hp

Question 16

T/F
An example of a fossil fuel is hydrogen

Answer 16

False

Question 17

T/F
Specific volume is a term used to indicate the space a weight of gas will occupy

Answer 17

True

Question 18

Complete each statement
One hp of work energy equals the amount of work done when lifting ____________ pounds to the height of __________ foot in ________minute.

Answer 18

33,000 pounds ; 1 foot ; 1 minute

Question 19

Complete each statement
A material that occupies space and has mass is called __________.

Answer 19

Matter

Question 20

_______________ ft/lb of work is accomplished when a 800 pound condensing unit is lifted to the top of a 40 foot building.

Answer 20

32,000

800 x 40 = 32,000

Question 21

____________ is a method of converting electron flow to usable energy

Answer 21

Magnetism

Question 22

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

Answer 22

61434 Btu/h

3413 x 18 = 61434

Question 23

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

Answer 23

800 psig

Question 24

The density of water is ________
The specific gravity of water is _______

Answer 24

Water 62.4
Specific gravity 1

Question 25

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

Answer 25

13.33 ft3/lbs 1 / 0.075 = 13.33

Question 26

T/F In 1990 President George Bush signed the clean oil act amendment that initiated, production, freezes, and bands on certain popcorn oils

Answer 26

False

Question 27

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

Answer 27

51.274 Kw 175000 / 3413 = 51.274

Question 28

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

Answer 28

Mold, bacteria, viruses Properly sized air conditioning system

Question 29

How would you calculate standard condenser efficiency?

Answer 29

Measure condensing temp against exiting temp. Ideal is 30° plus ambient.

Question 30

Draw the pressure anthropic shape from the refrigeration cycle. Add as much detailed as you can.

Answer 30

Draw

Question 31

________ and ________ are responsible for naming refrigerants and identifying their characteristics.

Answer 31

ASHRAE and ANSI

Question 32

Define specific volume

Answer 32

The density of a substance divided by density of water

Question 33

Define density

Answer 33

The weight per unit of volume of a substance

Question 34

Define specific volume

Answer 34

The weight of a substance compared to the weight of an equal volume of water