Occupation: Petroleum Pump System Operators, Refinery Operators, and Gaugers
Task: Perform tests to check the qualities and grades of products, such as assessing levels of bottom sediment, water, and foreign materials in oil samples, using centrifugal testers.

Scale: Frequency of Task (Categories 1-7)
Category: 1
Value: 0 (N=50)
Source: Incumbent, 06/2007

Scale: Frequency of Task (Categories 1-7)
Category: 2
Value: 3.13 (N=50)
Source: Incumbent, 06/2007

Scale: Frequency of Task (Categories 1-7)
Category: 3
Value: 4.4 (N=50)
Source: Incumbent, 06/2007

Scale: Frequency of Task (Categories 1-7)
Category: 4
Value: 5.53 (N=50)
Source: Incumbent, 06/2007

Scale: Frequency of Task (Categories 1-7)
Category: 5
Value: 40.49 (N=50)
Source: Incumbent, 06/2007

Scale: Frequency of Task (Categories 1-7)
Category: 6
Value: 37.28 (N=50)
Source: Incumbent, 06/2007

Scale: Frequency of Task (Categories 1-7)
Category: 7
Value: 9.16 (N=50)
Source: Incumbent, 06/2007

Scale: Importance
Value: 4.26 (N=50)
Source: Incumbent, 06/2007

Scale: Relevance of Task
Value: 65.53 (N=91)
Source: Incumbent, 06/2007