plumbing science mock test Flashcards
1
Q
what is the SI base unit for length
A
metre
2
Q
which property measures the resistance of a material to deformation or bending
A
hardness
3
Q
what metal is ferrous
A
copper
4
Q
which plastic is used for underground cold water mains
A
MDPE
5
Q
what is the process of water changing directly from ice to vapour called
A
sublimation
6
Q
what type of corrosion occurs due to high flow rates and turbulence in pipes
A
erosion corrosion
7
Q
which gas has a specific gravity less than one
A
helium
8
Q
which material is used for compression fittings in plumbing
A
brass
9
Q
what is the term for the ability of water to flow between narrow spaces
A
capilarity
10
Q
what is the main gas component in natural gas
A
methane
11
Q
which type of plastic becomes brittle in freezing temperatures
A
thermoplastics
