ICC AST INSTALLATION/RETROFITTING
ACTUAL EXAMINATION TEST 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◉ 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.
◉ 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.
◉ 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.
ACTUAL EXAMINATION TEST 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◉ 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.
◉ 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.
◉ 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.
