Section 4 - Types of Tanks

Question 1

Section 3 - Definitions / Per API 653, the generic definition of atmospheric pressure is pressures up to

Answer 1

2.5 psig

Question 2

The inspection guidelines of API 572 should be followed when operating pressure exceeds

Answer 2

15 psig

Question 3

As the product temperature increases, the products vapor pressure

Answer 3

Increases

Question 4

A pressure-vacuum vent is installed on a tank. The PV vent will ensure that the inside pressure or inside vacuum does not exceed

Answer 4

A few ounces per square inch

Question 5

While in operation, which tank type roof is normally supported by internal members

Answer 5

Cone Roof

Question 6

Fixed-Roof tanks are often self-supporting when tank diameter does not exceed

Answer 6

60’

Question 7

Which of the following is not an advantage of an umbrella roof or a geodesic dome roof

Answer 7

A. Low Cost Roof (this is the answer)
B. Keeps snow and rain off of an internal floating roof
C. Can be used on any size of tank
D Does not require internal supports

Question 8

what is the primary reason for using a floating roof instead of a cone roof tank

Answer 8

Minimizes vapor emmissions

Question 9

Which type of external floating-roof is the most susceptible to sinking?

Answer 9

Pan (Single-Deck)

Question 10

Which type of external floating-roof is the least susceptible to sinking?

Answer 10

Double Deck

Question 11

Why are internal floating roofs sometimes used?

Answer 11

Either reduces vapor loss or minimizes effects of weather (rain & snow)

Question 12

Which is the most common type of floating-roof seal?

Answer 12

Mechanical shoe

Question 13

Which of the following floating roofs is normally not constructed from steel?

Answer 13

Internal on floats

Question 14

Low pressure storage tanks are those with a design pressure from:

Answer 14

2.5-15 psig

Question 15

OPEN BOOK API 620 Appendix R provides design rules for refrigerated tanks with design temps between:

Answer 15

-60 to 40F

Question 16

OPEN BOOK API 620 Appendix Q provides design rules for refrigerated tanks with design temperatures between

Answer 16

-325 to -60 F

Question 17

Low-pressure storage tanks are normally used for products that have a

Answer 17

vapor pressure that exceeds limits of API 650

Question 18

Hemispheroidal, spheroidal and noded spheroidal tanks are commonly used when the design pressure exceeds

Answer 18

5.0 psig

Question 19

OPEN BOOK Which code covers refrigerated liquefied gas tank systems?

Answer 19

API 625