6025SCPPT1Q3

Which material is very ductile and can be bent into shape?

• Lead

• Copper

• Zinc

• Aluminium

Which material has a high specific heat capacity and requires a lot of energy to heat up?

• Water

• Aluminium

• Mercury

• Lead

What is the coefficient of linear expansion for plastic uPVC?

• 0.000016

• 0.000011

• 0.000029

• 0.00018

What is the most common form of corrosion?

• Rust

• Decomposition

• Oxidation

• Erosion

Which material is used for central heating pipework is protected by inhibitor?

• Copper

• Lead

• Steel

• Aluminium

What protects LCS pipes from the external environment and underground for 20 years?

• Painting

• Galvanised coating

• Inhibitor

• Denso tape

What is the resistance of a material to scratching, abrasion or cutting?

• Specific heat capacity

• Hardness

• Malleability

• Ductility

How much can a material be compressed without fracturing?

• Ductility

• Specific heat capacity

• Malleability

• Hardness

How much energy is required to raise 1kg of water through 1C?

• 0.554 KJ/kg/0C

• 0.887 KJ/kg/0C

• 0.397 KJ/kg/0C

• 4.186 KJ/kg/0C

What causes creaking pipework under floors?

• Corrosion

• Expansion and contraction

• Oxidation

• Rust