Unit 1 Btec

Measurement of sound levels in

• BTU

• Watts

• Decibel

• logarithmic

Sound absorption refers to

• the loss of sound energy when sound waves hit external section of building

• the loss of sound energy when sound waves hit ceilings, walls and floors

• increase of sound during sound waves

• decrease of sound during sound waves

Mechanisms of heat transfer in various building components: a combination of conduction, convection, and radiation

• True

• False

Internal heat gains arise from sensible heat only

• True

• False

Some materials can decay due to natural processes of

• Ageing

• Weather

• Timber decay

• All the mentioned

Freshly felled timber will contain significant amounts of moisture, but when used in construction it is likely to dry and shrink

• True

• False

Modulus of elasticity= stress/ area

• True

• False

Colour Rendering Index used to compared with sunlight

• True

• False

Power Density (W / m2) equivalent to amount of power processed per unit volume / unit area

• Trye

• False