Pumps Chapter 1 pp 1-27

Question 1

From the Pump Manual:

Physical properties of _ are important to the understanding of fire service hydraulics

Answer 1

Water

Question 2

From the Pump Manual:

Weight of water varies according to _ and _

Answer 2

Temp and mineral content

Question 3

From the Pump Manual:

Hydraulics is a branch of the physical sciences that deals with what?

Answer 3

The properties of liquids at rest or in motion

Question 4

From the Pump Manual:

What are two of the specialized areas within the general field of hydraulics?

Answer 4

Hydrostatics and hydrodynamics

Question 5

From the Pump Manual:

What specialized area of hydraulics involves the motion and actions of liquids?

Answer 5

Hydrodynamics

Question 6

From the Pump Manual:

What specialized area of hydraulics involves the pressure and equilibrium of liquids?

Answer 6

Hydrostatics

Question 7

From the Pump Manual:

What interest does the fire service have in hydraulics?

Answer 7

As it relates to the delivery of water in sufficient quantities to extinguish fires

Question 8

From the Pump Manual:

What helps the fire service achieve desired quantity of flows and ranges of streams?

Answer 8

Set of applied formulas

Question 9

From the Pump Manual:

What French mathematician and scientist laid the foundation for modern hydraulics?

Answer 9

Blaise Pascal

Question 10

From the Pump Manual:

What did Pascal discover?

Answer 10

That pressure in a liquid operates equally in all directions and that this pressure acts at right angles to containing surfaces

Question 11

From the Pump Manual:

<p>

| What year did Pascal make his discovery about pressure in fluids?</p>

Answer 11

<p>

| 1653</p>

Question 12

From the Pump Manual:

What is the most popular figure used to express the approx weight of one cubic foot of water?

Answer 12

62.5lbs

Question 13

From the Pump Manual:

True or false water is practically incompressible

Answer 13

TRUE

Question 14

From the Pump Manual:

_ is defined as a force divided by the area over which it is delivered

Answer 14

Pressure

Question 15

From the Pump Manual:

_ pressure of water is directly proportional to it’s depth

Answer 15

Downward

Question 16

From the Pump Manual:

How much pressure does a one foot high column of water exert per square inch?

Answer 16

0.434

Question 17

From the Pump Manual:

What is the height of water that would produce exactly one pound of pressure per square inch?

Answer 17

2.304 feet

Question 18

From the Pump Manual:

Downward pressure of water in an open container is in no way affected by the _ of the container

Answer 18

Shape

Question 19

From the Pump Manual:

In a liquid what determines how much pressure is present?

Answer 19

Density or weight

Question 20

From the Pump Manual:

How many times heavier than water is mercury?

Answer 20

13.546

Question 21

From the Pump Manual:

What height of mercury would produce exactly one pound of pressure per square inch?

Answer 21

.17feet or 2.04 inches

Question 22

From the Pump Manual:

What substance and the pressure developed by it plays another important role in hydraulic theory?

Answer 22

Air

Question 23

From the Pump Manual:

What is the atmospheric pressure of the earth at sea level?

Answer 23

14.69 but commonly stated as 14.7

Question 24

From the Pump Manual:

True or false when additional pressure is applied by some external means to a liquid at rest in a confined area the same additional pressure is transmitted equally and undiminished at every other point in the liquid.

Answer 24

TRUE

Question 25

# From the Pump Manual: When a hoseline is placed in service from one of the outlets of the standpipe system the static pressure in the standpipe system would be reduced due to what?

Answer 25

the friction loss in the supply lines to the siamese, and in the standpipe itself.

Question 26

# From the Pump Manual: What are hydrostatics?

Answer 26

The pressure and equilibrium of liquids at rest.

Question 27

# From the Pump Manual: What are empirical methods?

Answer 27

methods based on experience and observation.

Question 28

# From the Pump Manual: _____ is the ability of the given liquid to resist shearing forces, and varies from substance to substance.

Answer 28

viscosity

Question 29

# From the Pump Manual: What type of liquid exhibits greater resistance to movement in response to a force?

Answer 29

A liquid possessing high viscosity

Question 30

# From the Pump Manual: What effect is caused by the molecular friction within the liquid itself and where the liquid comes in contact with the confining surface?

Answer 30

The laminar effect

Question 31

# From the Pump Manual: What part of the stream has the greater velocities?

Answer 31

The center of the stream

Question 32

# From the Pump Manual: What occasions cause the changes from streamline to turbulent?

Answer 32

increase of velocity,increase of area between boundaries,roughness of carrier,attractions, degrees of curvature bends, and number of bends

Question 33

# From the Pump Manual: What are the two classifications of friction loss?

Answer 33

friction loss that occurs due to the motion of a liquid along a smooth or rough surface, and Eddy loss, which occurs at relatively abrubt changes in flow, as at a valve, or direction change, or at sudden enlargement of a channel

Question 34

# From the Pump Manual:

| What word is used to indicate the quantity of liquid which will pass a given point in a given unit of time?

Answer 34

| flow

Question 35

# From the Pump Manual: What is the usual way of expressing volume of flow?

Answer 35

gallons per minute (GPM)

Question 36

# From the Pump Manual: _____ means the rate of speed at which liquid is moving in relation to same fixed point?

Answer 36

velocity of flow

Question 37

# From the Pump Manual: If the cross section area in part of an iron pipe were 10 square inches, and the pipe narrowed to a cross section of 2 square inches, and there was a flow of 300 GPM through entire pipe, the velocity of water in the 2 inch area would be ____ of the water in the 10 inch area?

Answer 37

5 times the velocity

Question 38

# From the Pump Manual: What determines the friction loss?

Answer 38

the velocity of the water

Question 39

# From the Pump Manual: What types of gauges have been developed to measure the forces involved in hydraulics?

Answer 39

mercury and water manometers, pitot tubes and bourdon gauges

Question 40

# From the Pump Manual: ____ is a device used to measure velocity and pressure heads present within a flowing stream?

Answer 40

pitot tube

Question 41

# From the Pump Manual: What gauges consist of a curved metal tube, gears and a needle pointer?

Answer 41

bourdon gauges

Question 42

# From the Pump Manual: What are the 3 kinds of gauges?

Answer 42

those that measure only pressure, those that messure only vacuum and those that measure both.

Question 43

# From the Pump Manual: On gauges that measure preasure only, what do the calibrations represent?

Answer 43

pounds per square inch

Question 44

# From the Pump Manual: On gauges that measure vacuum only, what do the calibrations represent?

Answer 44

inches of mercury

Question 45

# From the Pump Manual: On gauges that measure pressure and vacuum, what do the calibrations represent?

Answer 45

pounds per square inch and inches of mercury

Question 46

# From the Pump Manual: What can be described as "that pressure present with atmospheric pressure representing zero"?

Answer 46

relative pressure

Question 47

# From the Pump Manual: ____ is described as the actual amount of water pressure present?

Answer 47

absolute pressure

Question 48

# From the Pump Manual: How much does 1 cubic foot of water weigh?

Answer 48

62.5 pounds

Question 49

# From the Pump Manual: How many cubic inches are in one cubic foot?

Answer 49

1728 cubic inches

Question 50

# From the Pump Manual: How many gallons are in one cubic foot of water?

Answer 50

7.481

Question 51

# From the Pump Manual: How many cubic inches are in one U.S. gallon?

Answer 51

231 cubic inches

Question 52

# From the Pump Manual: How much does 1 U.S. gallon of water weigh?

Answer 52

8.35 pounds

Question 53

# From the Pump Manual: How many feet of water exert a pressure of 1 pound per square inch?

Answer 53

2.304 feet

Question 54

# From the Pump Manual:

| In theory an absolutely perfect positive displacement pump could draft water, how many feet?

Answer 54

| 33.9 feet

Question 55

# From the Pump Manual: Are there any fire department pumping apparatus that can lift water 33.9 feet?

Answer 55

no

Question 56

# From the Pump Manual: A pump in excellent condition can cause enough vacuum so that atmospheric pressure can force water about ___ feet and one in average condition, about ___ feet?

Answer 56

28 and 26

Question 57

# From the Pump Manual: One inch of mercury is equivilent to how many pounds per square inch?

Answer 57

.49 pounds per square inch

Question 58

# From the Pump Manual: What is a static reading?

Answer 58

A reading of an intake gauge on the pumping apparatus at that time(approx 9 inches)would represent a vacuum required solely for lift.

Question 59

# From the Pump Manual: A reading of the intake gauge, taken when operating with a particular flow of water is what?

Answer 59

A dynamic reading

Question 60

# From the Pump Manual: If your vacuum is destroyed by air leakage after the pump has been primed, what will happen?

Answer 60

It will cause the pump to lose it's prime

Question 61

# From the Pump Manual: What term refers to the pressure prevailing in the hose immediately prior to the waters entrance into the nozzle?

Answer 61

nozzle pressure

Question 62

# From the Pump Manual: What instrument is a long ended tube with a 90 degree curve at one end?

Answer 62

pitot tube

Question 63

# From the Pump Manual: Where should the pitot tube be held when testing a stream?

Answer 63

at the center of the stream

Question 64

# From the Pump Manual: The range of a firefighting stream is dependant upon what 4 factors?

Answer 64

nozzle pressure, nozzle diameter, angle of inclination above horizontal plane and wind speed and direction.