plumbing science

Question 1

what is latent heat?

Answer 1

Latent heat is energy absorbed or released during state change. The temperature remains constant.

Question 2

what is sensible heat?

Answer 2

Sensible heat is energy that causes temperature change. No state change occurs. It is crucial in heating and cooling calculations.

Question 3

How is materials measured?

Answer 3

Material measured in g/cm cubed, relative density 1000th of materials measured in kg/m cubed.

Question 4

What is conducting?

Answer 4

conducting is when heat travels through a substance touching something.

Question 5

What is convection?

Answer 5

Convected heat is when heat travels round a room. For example a radiator warms up the air around it, which then rises and circulates around the room

Question 6

What is radiation?

Answer 6

Radiation heat is when you can feel heat come of it. For example the heat you feel of a fireplace is thermal radiation.

Question 7

what is acceleration measured in?

Answer 7

meters per second squared m/s squared.

Question 8

How is acceleration defined?

Answer 8

Distance travelled overtime that includes speeding up, slowing down and changing direction.

Question 9

What is density measured in?

Answer 9

Kilograms per metre cubed. Kg/m cubed.

Question 10

How is density defined?

Answer 10

Standard unit of material density, expressed directly in base SI units.

Question 10

How is capacity measured?

Answer 10

Litre/L, a litre is a measurement of 1000 centimetres cubed.

Question 10

how is area measured?

Answer 10

square meter, multiply length times width.

Question 11

What is application in liquids?

Answer 11

Both latent heat and sensible heat are important.

Question 12

what is volume measured in?

Answer 12

cubic metre/m cubed. Multiply length width and hight, 3-dimensional.

Question 12

What is a ferrous metal?

Answer 12

A metal that contains iron as a primary element.

Question 12

What is application in gasses?

Answer 12

Sensible heat is often more significant, consider the air conditioning systems.

Question 12

what is mass measured in?

Answer 12

kilogram/kg

Question 12

what is length measured in?

Answer 12

metre/m

Question 12

what is pressure measured in?

Answer 12

1 bar is equal to 10m of water pressure.

Question 12

What is a none ferrous metal?

Answer 12

Metals that do not contain iron.

Question 13

what is ductility?

Answer 13

a material that has ability to stretch thin when tensile stress is applied.

Question 14

what is hardness?

Answer 14

the resistance of a material.

Question 15

what is LPG?

Answer 15

its a flammable gas that is heavier than most air.

Question 16

what is a property of butane?

Answer 16

it has high calorific value and high temperature change.

Question 17

what is a property of propane?

Answer 17

its boiling point is -45 degrees

Question 18

what is water at 100 degrees?

Answer 18

a gas

Question 19

what is water at 0 degrees?

Answer 19

a solid

Question 20

what is water at room temperature?

Answer 20

a liquid

Question 21

What is an alloy?

Answer 21

a mix of two or more metals.

Question 22

what is conduction?

Answer 22

when heat moves from one object to the other.

Question 23

what is the unit of power measured in?

Answer 23

The watt is the SI unit for power.

Question 24

what is the unit of heat measured in?

Answer 24

Joules

Question 25

what is the unit of energy measured in?

Answer 25

joules

Question 26

what is specific heat capacity?

Answer 26

amount of heat required to change a unit mass of that substance by one degree in temperature.

Question 27

what is it called when water is turned to steam?

Answer 27

evaporation

Question 28

what is it called when a solid is turned to water?

Answer 28

liquid

Question 29

what is it called when steam is turned back to water?

Answer 29

condensation

Question 30

what is it called when water turns to ice?

Answer 30

solidification

Question 31

what are 2 properties of a solid?

Answer 31

they have a fixed shape and they cannot be compressed.

Question 32

what are 2 properties of a gas?

Answer 32

particles can move freely in any direction and they can be compressed and squashed.

Question 33

what are 2 properties of a liquid?

Answer 33

liquids flow and take shape of a container and they cannot be squashed or compressed

Question 34

what is the flow rate?

Answer 34

the amount of fluid that flows in a given time

Question 35

what is pressure?

Answer 35

pressure is an expression of force exerted on a surface

Question 36

what is velocity?

Answer 36

the rate and direction of the change in the position or object.

Question 37

what does a roughness of a material surface mean?

Answer 37

rougher the pipe material the greater the resistance flow

Question 38

what will the difference in a pipe size define?

Answer 38

bigger the pipe the greater volume of gasses or liquids

Question 39

what will reductions in pipe size do?

Answer 39

a size reduction will reduce the pressure and the flow rate but increases the velocity.

Question 40

what is waters boiling point in kelvin?

Answer 40

373

Question 41

water at 0 degrees in kelvin is?

Answer 41

273

Question 42

what does painting central heating system do?

Answer 42

atmospheric corrosion

Question 43

what has a sinusoidal wave form?

Answer 43

AC electricity

Question 44

what would an anti-capillary groove in lead weathering stop?

Answer 44

water being drawn into building

Question 45

a change of state may occur when water is heated to?

Answer 45

1000C.

Question 46

which material is the best conductor of heat?

Answer 46

copper

Question 47

what will cause siphonage too occur?

Answer 47

suction at point c

Question 48

what will a decrease pipe size allow?

Answer 48

reduce flow

Question 49

what will a larger pipe allow?

Answer 49

water flows more slowly

Question 50

what does pipe diameter affect?

Answer 50

fluid velocity

Question 51

what do elbows restrict?

Answer 51

flow of water

Question 52

what does CWSC mean?

Answer 52

cold water storage cisterns