General

Question 1

Air Standard Condition

Answer 1

20 degrees Celcius at 1013 hPa (1013 mbar)

Question 2

Restriction and Differential Pressure Test

Answer 2

determine the restriction/differential pressure/ pressure loss across the unit under test which will result when air si passed through under predetermined conditions.

Question 3

Efficiency Test

Answer 3

determine the retention capabilities of the unit under test

Question 4

3 Types of efficiency tests (1)

Answer 4

full-life efficiency

Question 5

3 Types of efficiency tests (2)

Answer 5

incremental efficiency

Question 6

3 Types of efficiency tests (3)

Answer 6

initial efficiency

Question 7

full-life efficiency

Answer 7

determined when the terminal condition is reached

Question 8

incremental efficiency

Answer 8

determined when eg. 10%, 25% and 50% of the terminating differential pressure minus the initial differential pressure are reached

Question 9

initial efficiency

Answer 9

determined after the addition of 20g of contaminant or the number of grams numerically equivalent to 6 times the air flow in cubic metres per minute, whichever is bigger

Question 10

Filter Element Pressure Collapse Test

Answer 10

determine the ability of an air filter element to withstand a specified differential pressure and/or to determine the differential at which collapse occurs

Question 11

Secondary Element Blocking Test

Answer 11

determines the increase in restriction/differential pressure and mass of a secondary element, caused by the dust that has passed through the primary element