Plumbing 🔬

Question 1

What are the 4 different groups of metals?

Answer 1

1.Pure metals
2.Alloys
3.Ferrous metals
4.non-ferrous metals

Question 2

What is a ferrous metal?

Answer 2

Ferrous metals refer to any metal that contains iron, that means they don’t rust.

Question 3

What are the two types of plastic?

Answer 3

Thermoplastics and thermo-setting plastic

Question 4

What is the definition of hardness in plumbing science?

Answer 4

The resistance of material to being cut, deformed or bent.

Question 5

What is compressive strength?

Answer 5

The maximum force a material can withstand when being crushed?

Question 6

What is ductility?

Answer 6

The amount that a material can be pulled

Question 7

What is the ph number for pure water?

Answer 7

7

Question 8

What is the freezing point of water at sea level in degrees C

Answer 8

0

Question 9

What are the 3 elements of the fire triangle?

Answer 9

Heat fuel and oxygen

Question 10

What would decreasing the pipe size do to the flow rate and the velocity?

Answer 10

It would reduce the flow rate and increase the velocity

Question 11

How is hard water formed?

Answer 11

Hard water is formed when water percolates through deposits of limestone

Question 12

What do the letters DZ stand for on brass fittings?

Answer 12

De-zinced

Question 13

What is density equal too?

Answer 13

It’s total mass divided by it’s total volume

Question 14

What is an alloy?

Answer 14

Two metals that are mixed together

Question 15

What is meant by the term calorific value?

Answer 15

The energy contained in a fuel or food

Question 16

What is another way of measuring temperature?

Answer 16

Kelvin

Question 17

What is bar used for?

Answer 17

It is the unit that we measure water pressure with

Question 18

Is copper ferrous or non ferrous?

Answer 18

Non-ferrous

Question 19

Is lead ferrous or non ferrous?

Answer 19

Non ferrous

Question 20

What is torsion strength?

Answer 20

The maximum force a material can withstand when being twisted

Question 21

What are the two types of plastic used in domestic plumbing

Answer 21

Thermo and thermo-setting plastics

Question 22

What is galvanic corrosion

Answer 22

Galvanic corrosion occurs when two dissimilar metals are in contact with each other through the presence of an electrolyte

Question 23

What is the formula for pressure

Answer 23

Force divided by area

Question 24

What is the si unit for length

Answer 24

M

Question 25

What is the unit of power

Answer 25

The watt is the si unit for power

Question 26

The unit of heat is

Answer 26

Joules

Question 27

What is the freezing point of water in kelvin

Answer 27

273k

Question 28

What is the boiling point of water in kelvin

Answer 28

373k

Question 29

How much percent dose water expand by

Answer 29

10%

Question 30

What is conduction

Answer 30

Conduction occurs when when heat travels through a substance

Question 31

what dose soft water contain?

Answer 31

carbon dioxide

Question 32

how dose water become temporarily hard water

Answer 32

by passing through calcium carbonate

Question 33

is lpg heavier than air

Answer 33

yes

Question 34

what is SHC?

Answer 34

is the amount of heat required to change a unit mass of that substance by one degree in temp

Question 35

what is everything on earth made up of?

Answer 35

atoms