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WorksheetsPlumbing Science PT3
Total questions: 23
Worksheet time: 12mins
Brass is an alloy made from
Copper and tin
Zinc and copper
Copper and aluminium
Bronze and copper
The definition of an alloy is:
It is magnetic
It is a mixture of two or more metals
It is always coloured silver
The main property of the material is heat retention
Low carbon steel is made using:
Low magnetic steel
Lightweight carbon
Iron and carbon
Stainless steel and carbon
MDPE plastic is used for:
Underground cold water supplies
Above ground cold water supplies
Underground hot water supplies
Above ground hot water supplies
Polybutylene can be used for:
Guttering
Downpipes
Waste pipes
Central heating pipes
Ceramics are used for:
Insulation on cold water pipework
Kitchen cupboard doors for hygiene
Sanitary appliances
Filtration systems for swimming pools
Which of the following is a ferrous metal?
Brass
Copper
Cast iron
Aluminium
Which of the following statements is true about a thermoplastic?
When cold it can be brittle
It remains soft and pliable at any temperature
It cannot be recycled
Once heated it cannot be re-shaped
Hardness describes the ability of a material to resist scratching, bending, abrasion and cutting.
TRUE
FALSE
The term 'conductivity' can refer to both electrical and thermal.
True
False
Ductility is the ability of a material to withstand being pulled, pushed or stretched without breaking.
True
False
Malleability describes the capacity for a material to be cut cleanly by two opposing forces
True
False
The hardest material known to man is carbide
True
False
Which material can de-zincification take place in?
Aluminium
Brass
Copper
Coal
True or false: Soft water is acidic.
True
False
Which of the following is a build-up of limescale likely to produce:
Unsightly evaporation
Restrictions in flow
Dezincification
Erosion
Which one of the following does not cause erosion?
Turbulence in the water flow
Bad workmanship
Fast-flowing water
Calcium in water
At what temperature is limescale formed in temporary hard water?
65ºC
55ºC
45ºC
35ºC
For rust to form in a plumbing system, which of the following combination of materials/substances must be present?
Water + Limescale + Iron
Oxygen + Iron + Water
Oxygen + Brass + Iron
Iron + Water + Brass
Which is the best description of dezincification?
Tin is leached out of a bronze component
Copper is leached out of a brass component
Iron eats into a zinc component
Zinc is leached out of a brass component
Which of the following materials is known for its high tensile strength?
Aluminium
Steel
Brass
Copper
True or false: Stainless steel is resistant to corrosion.
True
False
What is the primary component of bronze?
Iron
Aluminium
Copper
Zinc
