Introduction to Hydraulics

Question 1

Define Hydraulics

Answer 1

The science of water (or other fluids) at rest and in motion.

Question 2

Define Hydrostatics

Answer 2

The study of water at rest.

Question 3

Definde Hydrodynamics

Answer 3

The study of water in motion.

Question 4

Water gets less dense just before it ___________.

Answer 4

Freezes

Question 5

Water is densest at what temperature?

Answer 5

38 degrees F

Question 6

At its densest, how much does a cubic foot of fresh water weigh?

Answer 6

62.4 pounds

Question 7

How many cubic inches does a cubic foot of water occupy?

Answer 7

1,728 cubic inches

Question 8

How many cubic inches does a gallon of water occupy?

Answer 8

231 cubic inches

Question 9

How much does a gallon of water weigh?

Answer 9

8.34 pounds

Question 10

How many gallons does a cubic foot of water contain?

Answer 10

7.48 gallons

Question 11

What is the boiling point of water?

Answer 11

212 degrees F

Question 12

What is the freezing point of water?

Answer 12

32 degrees F

Question 13

Is water compressible?

Answer 13

No

Question 14

Water expands __________(1) times when converted to steam at ________(2) degrees F.

Answer 14

(1) 1,700
(2) 212 degrees F

Question 15

How many BTUs is the enthalpy of vaporization?

Answer 15

970.3 BTUs

Question 16

Define Enthalpy

Answer 16

The amount of heat absorbed, or given off, by a substance when it changes state.

Question 17

Define Enthalpy of Vaporization

Answer 17

Liquid to Vapor

Question 18

Define Specific Heat

Answer 18

The amount of heat in BTUs required to raise the temperature of 1 pound of substance at 1 degree F.

Question 19

What is the formula for calulating specific heat?

Answer 19

Weight of Water x Change in Temperature

Question 20

Define NFF

Answer 20

Needed Fire Flow - an estimation of the amount of water, in gpm, needed to extinguish a fire in a specific building.