ANSWERS | COMPREHENSIVE STUDY GUIDE|A+ STUDY RESOURCE |
Prior to conducting a tank inspection, the inspector should: -
ANSWER
read previous inspection records.Anchor bolts may be subject to what type of degradation?
The generic definition of atmospheric pressure is pressures up to: -
ANSWER
15 psig
The inspection guidelines of API 572 should be followed when the operating pressure ex-
ceeds: -
ANSWER
2.5 psig
As the product temperature increases, the product's vapor pressure: -
ANSWER
Decreases only if specific gravity is less than 1.0.
A pressure-vacuum vent is installed on a tank. The PV vent will ensure that the inside pres-
sure or inside vacuum does not exceed: -
ANSWER
A few ounces of pressure.
While in operation, which tank type roof is supported by internal members? -
ANSWER
1
,Cone roof
Fixed-roof tanks are often self-supporting when tank diameter does not exceed: -
ANSWER
60 feet
Which is an advantage of a geodesic dome roof? -
ANSWER
Keeps snow and rain off of an internal floating roof and Can be used on any size of tank
What is the primary reason for using a floating roof instead of a cone roof tank? -
ANSWER
Minimizes vapor emissions
Which type of external floating-roof is the most susceptible to sinking? -
ANSWER
Pan Floating-roof
Which type of external floating-roof is the least susceptible to sinking? -
ANSWER
Double-deck Floating-roof
Which is the most common type of floating-roof seal? -
ANSWER
Mechanical shoe
Why are internal floating roofs sometimes used? -
2
, ANSWER
Reduces vapor loss or minimizes effects of weather (rain & snow)
What kind of floating roofs is normally not constructed from steel? -
ANSWER
Internal on floats
Low-pressure storage tanks are those with a design pressure from: -
ANSWER
2.5 - 15 psig.
Low-pressure storage tanks are normally used for products that have a: -
ANSWER
High vapor pressure.
API 620 Appendix R provides design rules for refrigerated tanks with design
temperatures between: -
ANSWER
-60 to 40 F.
API 620 Appendix Q provides design rules for refrigerated tanks with design
temperatures between: -
ANSWER
-270 to -60 F.
Hemispheroidal, spheroidal, and noded spheroidal tanks are commonly used when
the design pressure exceeds: -
3
Prior to conducting a tank inspection, the inspector should: -
ANSWER
read previous inspection records.Anchor bolts may be subject to what type of degradation?
The generic definition of atmospheric pressure is pressures up to: -
ANSWER
15 psig
The inspection guidelines of API 572 should be followed when the operating pressure ex-
ceeds: -
ANSWER
2.5 psig
As the product temperature increases, the product's vapor pressure: -
ANSWER
Decreases only if specific gravity is less than 1.0.
A pressure-vacuum vent is installed on a tank. The PV vent will ensure that the inside pres-
sure or inside vacuum does not exceed: -
ANSWER
A few ounces of pressure.
While in operation, which tank type roof is supported by internal members? -
ANSWER
1
,Cone roof
Fixed-roof tanks are often self-supporting when tank diameter does not exceed: -
ANSWER
60 feet
Which is an advantage of a geodesic dome roof? -
ANSWER
Keeps snow and rain off of an internal floating roof and Can be used on any size of tank
What is the primary reason for using a floating roof instead of a cone roof tank? -
ANSWER
Minimizes vapor emissions
Which type of external floating-roof is the most susceptible to sinking? -
ANSWER
Pan Floating-roof
Which type of external floating-roof is the least susceptible to sinking? -
ANSWER
Double-deck Floating-roof
Which is the most common type of floating-roof seal? -
ANSWER
Mechanical shoe
Why are internal floating roofs sometimes used? -
2
, ANSWER
Reduces vapor loss or minimizes effects of weather (rain & snow)
What kind of floating roofs is normally not constructed from steel? -
ANSWER
Internal on floats
Low-pressure storage tanks are those with a design pressure from: -
ANSWER
2.5 - 15 psig.
Low-pressure storage tanks are normally used for products that have a: -
ANSWER
High vapor pressure.
API 620 Appendix R provides design rules for refrigerated tanks with design
temperatures between: -
ANSWER
-60 to 40 F.
API 620 Appendix Q provides design rules for refrigerated tanks with design
temperatures between: -
ANSWER
-270 to -60 F.
Hemispheroidal, spheroidal, and noded spheroidal tanks are commonly used when
the design pressure exceeds: -
3
