a
a
a
a
a
a
a
a
a
ICC AST Installation/ Retrofitting questions
a a a a
and answers well illustrated.
a a a a a
a
a
a
a
a
a
a
a
a
a
a
a
to aallow apassage abetween atanks afor ainspection aprovide aa aminimum aof? a-
acorrect
answers.1/6 aof athe asum aof athe aadjacent atank adiameters, abut anot aless athen a3
afeet.
a
pressure avacuum avents aremain anormally aclosed, aonly aopened awhen athe apressure
ainside athe atank areaches? a- acorrect aanswers.2 athrough a16 aounces aper asquare aInch
aor aa avacuum a
a
of a0.5 athrough a1.0 aounces aper asquare
ainch.
a
the aprimary acriterion afor atank afoundation adesign ais athe aallowable abearing apressure aof
asoil. a
a
- acorrect aanswers.this aranges afrom a1,000 apounds aper asquare afoot afor asoft aclay aor
a4,000
a
for acoarse, acompacted
agravel
a
nominal avent amust abe aat aleast? a- acorrect aanswers.2" anominal apipe asize. a
a
operating/ adesign apressure a
a
shop abuilt atanks aare adesigned afor aoperating apressures abetween aatmospheric aand a1.0
apsig. ain aorder afor aair aand avapor ato abe aexpelled afrom aa atank aduring afilling, athe
ainternal apressure amust aincrease ato aat aleast? a- acorrect aanswers.the apressure asetting
aof athe aventing adevice. ausually a2 aounces ato a1 apound aper asquare ainch aabove
aatmospheric apressure. apressure/ avacuum avents aremain anormally aclosed aonly awhen
athe apressure ain athe atanks areaches aa apredetermined apressure asetting aof? a- acorrect
aanswers.2 athrough a16 aounces aper asquare ainch aor aa avacuum aof a0.5 athrough a1.0
aounces aper asquare ainch. a
a
, in aorder afor aair ato aenter aa atank aduring aliquid awithdrawal athe ainternal atank apressure
amust abe a
a
reduced ato aa apont awhere? a- acorrect aanswers.It ais aat aleast a1 aounce abelow
aatmospheric
a
pressure.
a
A asuitable afoundation afor avertical atanks acan abe aconstructed awith aa afinished acourse aof
aclean, acompacted asand, agravel aor acrushed arock athat ais aplaced aover athe abase
acourse. aThe abase aand athe aFinnish acourses ashould aextend aat aleast? a- acorrect
aanswers.12" abeyond athe aperimeter aof athe atank. a
a
a - acorrect aanswers. a
a
to aprovide adrainage aand asettlement athe asurface aof awhich athe atank abottom arests
ashould abe a
a
at aleast? a- acorrect aanswers.6" aabove athe asurrounding aground
asurface.
a
Saddle asupports afor ahorizontal atanks amay abe aconstructed aof? a- a correct
aanswers.Steel aor a
a
reinforced aconcrete aand amust abe ainstalled aon aa afirm aand asuitable
afoundation.
a
Fire acodes arequire athat atank asaddles aare? a- acorrect aanswers.higher athan a12" aabove
athe afoundation. ahave aa aminimum afire arating aof a2 ahours aand abe aconstructed aof
aprotected asteel, amasonary aor areinforced aconcrete. a
a
roofing afelt aor aexpansion ajoint ais anot aan aacceptable aelectrical aisolation afor atank
asaddles. a-
a
correct
aanswers.
a
Reinforced aconcrete aslabs aare a6 ato a12 ainches athick aand aconstructed ato ameet a28
aday, a
a
minimum a3,000 apsi astrength arequirement. a- acorrect
aanswers.
a
when agrounding aa atank ause a#4 asolid aor astranded acable. a- acorrect aanswers.use a#12
aTW aor a
a
THHN athin astranded aor asolid awire ato abond
acomponents
a
the aminimum aopening ain aa avault afor apersonal aentry ashould abe aa adiameter aof aat
aleast? a-
a
correct
aanswers.30"
a