ICC AST Installation/ Retrofitting Exam fully solved & updated (latest
version verified for accuracy) | Latest!!
to allow passage between tanks for inspection provide a minimum of? - (ANSWER)1/6 of the sum of the
adjacent tank diameters, but not less then 3 feet.
pressure vacuum vents remain normally closed, only opened when the pressure inside the tank reaches?
- (ANSWER)2 through 16 ounces per square Inch or a vacuum of 0.5 through 1.0 ounces per square inch.
the primary criterion for tank foundation design is the allowable bearing pressure of soil. - (ANSWER)this
ranges from 1,000 pounds per square foot for soft clay or 4,000 for coarse, compacted gravel
nominal vent must be at least? - (ANSWER)2" nominal pipe size.
operating/ design pressure
shop built tanks are designed for operating pressures between atmospheric and 1.0 psig. in order for air
and vapor to be expelled from a tank during filling, the internal pressure must increase to at least? -
(ANSWER)the pressure setting of the venting device. usually 2 ounces to 1 pound per square inch above
atmospheric pressure.
pressure/ vacuum vents remain normally closed only when the pressure in the tanks reaches a
predetermined pressure setting of? - (ANSWER)2 through 16 ounces per square inch or a vacuum of 0.5
through 1.0 ounces per square inch.
in order for air to enter a tank during liquid withdrawal the internal tank pressure must be reduced to a
pont where? - (ANSWER)It is at least 1 ounce below atmospheric pressure.
A suitable foundation for vertical tanks can be constructed with a finished course of clean, compacted
sand, gravel or crushed rock that is placed over the base course. The base and the Finnish courses should
extend at least? - (ANSWER)12" beyond the perimeter of the tank.
, ICC AST Installation/ Retrofitting Exam fully solved & updated (latest
version verified for accuracy) | Latest!!
to provide drainage and settlement the surface of which the tank bottom rests should be at least? -
(ANSWER)6" above the surrounding ground surface.
Saddle supports for horizontal tanks may be constructed of? - (ANSWER)Steel or reinforced concrete and
must be installed on a firm and suitable foundation.
Fire codes require that tank saddles are? - (ANSWER)higher than 12" above the foundation. have a
minimum fire rating of 2 hours and be constructed of protected steel, masonary or reinforced concrete.
roofing felt or expansion joint is not an acceptable electrical isolation for tank saddles. - (ANSWER)
Reinforced concrete slabs are 6 to 12 inches thick and constructed to meet 28 day, minimum 3,000 psi
strength requirement. - (ANSWER)
when grounding a tank use #4 solid or stranded cable. - (ANSWER)use #12 TW or THHN thin stranded or
solid wire to bond components
the minimum opening in a vault for personal entry should be a diameter of at least? - (ANSWER)30"
normal tank vent should extend not less then? - (ANSWER)12' above the general grade level and be
located at least 5 feet from building openings. emergency vents may discharge inside vault but must
remain vapor tight during normal operation.
Emergency shut off switch must be located between 20 and 100 feet from the dispensers. - (ANSWER)
enclosed wiring within class 1 division 1 areas must use a maximum 3' long of explosion proof flexible
fittings. - (ANSWER)
version verified for accuracy) | Latest!!
to allow passage between tanks for inspection provide a minimum of? - (ANSWER)1/6 of the sum of the
adjacent tank diameters, but not less then 3 feet.
pressure vacuum vents remain normally closed, only opened when the pressure inside the tank reaches?
- (ANSWER)2 through 16 ounces per square Inch or a vacuum of 0.5 through 1.0 ounces per square inch.
the primary criterion for tank foundation design is the allowable bearing pressure of soil. - (ANSWER)this
ranges from 1,000 pounds per square foot for soft clay or 4,000 for coarse, compacted gravel
nominal vent must be at least? - (ANSWER)2" nominal pipe size.
operating/ design pressure
shop built tanks are designed for operating pressures between atmospheric and 1.0 psig. in order for air
and vapor to be expelled from a tank during filling, the internal pressure must increase to at least? -
(ANSWER)the pressure setting of the venting device. usually 2 ounces to 1 pound per square inch above
atmospheric pressure.
pressure/ vacuum vents remain normally closed only when the pressure in the tanks reaches a
predetermined pressure setting of? - (ANSWER)2 through 16 ounces per square inch or a vacuum of 0.5
through 1.0 ounces per square inch.
in order for air to enter a tank during liquid withdrawal the internal tank pressure must be reduced to a
pont where? - (ANSWER)It is at least 1 ounce below atmospheric pressure.
A suitable foundation for vertical tanks can be constructed with a finished course of clean, compacted
sand, gravel or crushed rock that is placed over the base course. The base and the Finnish courses should
extend at least? - (ANSWER)12" beyond the perimeter of the tank.
, ICC AST Installation/ Retrofitting Exam fully solved & updated (latest
version verified for accuracy) | Latest!!
to provide drainage and settlement the surface of which the tank bottom rests should be at least? -
(ANSWER)6" above the surrounding ground surface.
Saddle supports for horizontal tanks may be constructed of? - (ANSWER)Steel or reinforced concrete and
must be installed on a firm and suitable foundation.
Fire codes require that tank saddles are? - (ANSWER)higher than 12" above the foundation. have a
minimum fire rating of 2 hours and be constructed of protected steel, masonary or reinforced concrete.
roofing felt or expansion joint is not an acceptable electrical isolation for tank saddles. - (ANSWER)
Reinforced concrete slabs are 6 to 12 inches thick and constructed to meet 28 day, minimum 3,000 psi
strength requirement. - (ANSWER)
when grounding a tank use #4 solid or stranded cable. - (ANSWER)use #12 TW or THHN thin stranded or
solid wire to bond components
the minimum opening in a vault for personal entry should be a diameter of at least? - (ANSWER)30"
normal tank vent should extend not less then? - (ANSWER)12' above the general grade level and be
located at least 5 feet from building openings. emergency vents may discharge inside vault but must
remain vapor tight during normal operation.
Emergency shut off switch must be located between 20 and 100 feet from the dispensers. - (ANSWER)
enclosed wiring within class 1 division 1 areas must use a maximum 3' long of explosion proof flexible
fittings. - (ANSWER)
