Science

Question 1

What does STP stand for

Answer 1

Standard temperature and pressure

Question 2

Describes the heat added or removed from a substance that would cause a change in temperature of the substance

Answer 2

Sensible heat

Question 3

Describes the heat added or removed to a substance that would cause a change in state

Answer 3

Latent heat

Question 4

Describes a ratio of the heat capacity of a substance compared to that of water

Answer 4

Specific heat

Question 5

Describes the degree of hotness of a substance with no indication of the thermal energy content of the substance

Answer 5

Temperature

Question 6

States the volume of any dry gas varies inversely with the absolute pressure exerted upon it while pressure remains constant

Answer 6

Boyles law

Question 7

States that the volume of any dry gas varies directly with the absolute temperature of the gas while the absolute pressure of the gas remains the same

Answer 7

Charles law

Question 8

Density of 1cuft air at stp?

Answer 8

.0807 lbs/cuff

Question 9

Standard temperature and pressure values

Answer 9

32deg F 14.7 psi

Question 10

BTU value of latent heat of fusion at 14.7psi

Answer 10

144 btu

Question 11

BTU value of latent heat of vaporization at 14.7 psi

Answer 11

970.4 btu

Question 12

BTU value to change sensible heat of 1lb of water 1deg F

Answer 12

1 btu

Question 13

Three ways liquid chan be changed to a vapor

Answer 13

Boiling/steam
Flashing
Evaporation

Question 14

As pressure of a liquid increases boiling point?

Answer 14

Increases

Question 15

Definition of comfort for pipefitting

Answer 15

When the body is neither to hot or to cold

Question 16

Three ways body can loose heat

Answer 16

Evaporation (sweat)
Convection
Radiation

Question 17

TF: liquids and gasses make good conductors of heat

Answer 17

False

Question 18

Explain the purpose of expansion joints, loops, or bends

Answer 18

To prevent damage to piping by compensating for the expansion and contraction of piping

Question 19

Reason for putting an expansion tank in a hot water system

Answer 19

Allow for expansion of liquid

Question 20

What does it mean if an expansion tank becomes waterlogged

Answer 20

No air in the tank, diaphragm or something is bad

Question 21

What happens when an expansion tank becomes waterlogged

Answer 21

Relief valve will go off, call for more water, water will drain out vent, cycle will start again

Question 22

Specifically, where are metals with two different coefficient of expansion put together

Answer 22

Bimetal thermostats

Question 23

Three states of matter

Answer 23

Solid liquid gas

Question 24

Hydrometer is used for

Answer 24

Finding specific gravity of liquids

Question 25

Definition of substance

Answer 25

Any state of matter of a particular composition or makeup

Question 26

Definition of matter

Answer 26

Anything that has weight (mass) and occupies space or has a volume

Question 27

Definition of mass

Answer 27

The measure or quantity of matter which a body contains

Question 28

Definition of weight

Answer 28

Measure of the attraction of the earth for a given body

Question 29

Definition of energy

Answer 29

The ability to do work

Question 30

Definition of density

Answer 30

Weight of unit of volume of a substance

Question 31

Gallons per cuft

Answer 31

7.83 gal/cuft

Question 32

Weight of 1cuft of water

Answer 32

62.4 lbs

Question 33

What is absolute zero in Fahrenheit

Answer 33

-460 Fahrenheit