$2)$what does a vapour barrier need to be included in the construction of a building envelope assembly in cold?

a$)$to allow insulated exterior to retain moisture

b$)$to allow exterior assemblies to dry to the interior

c$)$to slow the diffusion of interior moisture into insulated exterior assemblies

d$)$to slow the diffusion of exterior moisture into insulated exterior assemblies

$3)$which approach should be used first when attempting to improve indoor air quality

a$)$treal the indoor air

b$)$install mechanical ventilatio

c$)$control the source if pollutants

d$)$install air purifiers

$4)$the indoor temp of a house is $20$C and outdoor is $-10$which of the following exterior wall assemblies has the greatest rate of heat loss?

a$)$a wall area of $450$has an RSI of $4$

b$)$a wall area of $500$has RSI of $1\mathrm{.}5$

c$)$a wall area of $550$has RSI of $1\mathrm{.}5$

d$)$a wall area of $1000$has an RSI of $3\mathrm{.}5$

$5)$what is the source of radon gas?

a$)$decomposing rock

b$)$breakdown of uranium

c$)$off$-$gassing of ground water sulfides

d$)$decomposition of organic material in the soil

$6)$which of the terms applies to HRV$?$

a$)$thermal performance factor

b$)$sensiblle recovery efficiency

c$)$heating performance factor

d$)$seasonal energy efficiency ratio

$7)$which of the following insulation type has the highest RSI$/$R per mm$/$in thickness

a$)$glass fibre batt

b$)$cellulose fibre loose$-$fill

c$)$semi rigid glass fibre boardstock

d$)$extruded poly boardstock

$8)$which of the following canNOT be used as a part of air barrier system?

a$)15\mathrm{.}8$pained drywall

b$)15\mathrm{.}8$mm oriented strad board

c$)25\mathrm{.}4$mm foil faced rigid poly

d$)50$mm rigid mineral wool insulated sheathing

$9)$which is BEST describe tainscree?

a$)$self adhering membrane to roof sheathing under shingle

b$)$exterior classing system placed tighly against the exterior sheathing

c$)$drained and vented air space between the exterior cladding and shething membrane

d$)$poly installed on the interior side of all joints and penetration sealed

$10)$which of the following is NOT accounded for when the performing a heat loss caculation for a house that is heated dolely with electicity?a$)$wondows b$)$air leakage c$)$flue losses d$)$common wall of an attached garage

$11)$which of the following in NOT an indication of moisture damage?

a$)$efflorescene and spalling brick

b$)$mould

c$)$rotting window and wall damage

d$)$cobwebs and greying of fibreglass batt insulation in the rim joist

$12)$which of the following should be attempted before all orded to alleviate issues shown

a$)$install a heat recovery system

b$)$increase the home indoor temp set poit

c$)$remove any source of excess moisture from home

d$)$replace the effected window with high performance energy efficient

$13)$whihc type of building envelope barrier system is comprised of combination of durable structurally supported and vapour permeable materials and need to be continous and sealed to inteded fuction?

a$)$air barrier

b$)$moisture barrier

c$)$vapor barrier

d$)$weather barrier