Sicence

Question 1

T or F

The specific heat of all substances is represented as a percentage of the specific heat of water?

Answer 1

T

Question 2

T or F
The human body loses heat in three ways? Radiation, Convection and Evaporation

Answer 2

T

Question 3

T or F
Pressure equals height times density?

Answer 3

T

Question 4

T or F

The boiling point of water is not affected by either an increase or decrease in pressure?

Answer 4

F

Question 5

T or F

physical change does not affect the chemical composition of a substance?

Answer 5

T

Question 6

T or F

All gasses have the same values for coefficients of expansion?

Answer 6

T

Question 7

T or F
Liquids and gases make poor conductors of heat?

Answer 7

T

Question 8

42 degrees celsisus is equal to how many degrees farenheit?

Answer 8

107.6

42°C x 9/5 + 32

• all values entered in these note cards will denote fractions as nine over 5 being 9/5.

Question 9

As a fluid flows through a piping system there is a loss of pressure due to friction. Circle the factors that apply to this pressure loss?

A: viscosity of fluid
B: length of pipe
C: velocity of flow
D: size and type of pipe
E: all of the above

Answer 9

E. All of the above

Question 10

The amount of heat in BTU required to change the temperature of one pound of a substance one degree F may be defined as the _____________ of that substance?

Answer 10

Specific heat

Question 11

If the pressure on water which is being warmed is increased, the rate of evaporation of the water is _____________?

Answer 11

Decreased

Question 12

Water pressure is usually measured by means of a _______________ type gauge?

Answer 12

Bourdon tube

Question 13

Standard atmospheric pressure equals _______ psi or __________ in. Of Hg.

Answer 13

14.7 psi or 29.921 hg

Question 14

The pressure at a certain depth below the surface of a liquid is _______ ?

Answer 14

Static head pressure

Question 15

With a few exceptions, solids expand when ________ and __________ when cooled.

Answer 15

Heated and Contract

Question 16

The thermo-couple operates under the principle that two _________ metals will produce a flow of electric current without am external source of electricity.

Answer 16

Dissimilar

Question 17

As pressure decreases, volume _________.

Answer 17

Increases

Question 18

As the pressure on a gas increases ( temperature remaining constant) the volume of the gas will __________?

Answer 18

Decrease

Boyles law

Question 19

A substance that has a definite volume but no definite shape is called a ________?

Answer 19

Liquid

Question 20

With the quantity of flow gpm constant, the velocity of flow will _________ with a decrease in pipe size.

Answer 20

Increase

Question 21

Absolute zero is calculated to be ________ degrees fahrenheit.

Answer 21

-460

Question 22

How many btu are required to change 20 gallons of water at 212° F to steam at 212°F?

Answer 22

20 gallons × 8.33lbs per 1 gallon of water.

= 166.60lbs x 970.4 Latent heat of Vaporization

= 161,668.64 BTU

Question 23

What is the definition of work?

Answer 23

Is the product of force x distance.

Question 24

What is the total weight of a tank filled with a liquid having a specific weight of .79? The tank is 52” in diameter by 8 ft in length and the tank weighs 300lbs empty.

Answer 24

Question 25

A boiler is located in the penthouse of a building 300 ft above the basement. If the city water supply has a water pressure of 45 psi in the basement, how much additional pressure must be furnished by the pump used to fill the boiler?

Answer 25

Question 26

What is one ft of water column expressed in psig?

Answer 26

.433 psig.

Question 27

If the density D and the weight W of an object is known, write the formula that may be used to determine the volume of an object.

Answer 27

V = W/D

Or V = W÷D

Question 28

What are the three states of matter?

Answer 28

Solids, Liquids, Gas or Vapor.