Meanings

Question 1

ISO

Answer 1

International Organization for Standardization

Question 2

Air Cleaner

Answer 2

device which removes particles suspended in the fresh charge as it is drawn into the engine

Question 3

Filter Element

Answer 3

replaceable part of the air filter, consisting of the filter material and carrying frame

Question 4

secondary element

Answer 4

air cleaner element fitted downstream of the primary element for the purpose of providing the engine with protection against dust

Question 5

events for protection against dust

Answer 5

certain types of primary element failure

Question 6

events for protection against dust (2)

Answer 6

dust being present during the removal of the primary element for servicing

Question 7

unit under test

Answer 7

either a single air cleaner element or a complete air cleaner assembly

Question 8

single-stage air cleaner

Answer 8

air cleaner which does not incorporate a separate precleaner

Question 9

multistage air cleaner

Answer 9

air cleaner consisting of two or more stages, the first usually being a precleaner, followed by one or more filter elements

Question 10

precleaner

Answer 10

device usually using inertial or centrifugal means to remove a portion of the test dust prior to reaching the filter element

Question 11

test air flow

Answer 11

measure of the quantity of air drawn through the air cleaner outlet per unit time

Question 12

rated air flow

Answer 12

flow rate specified by the user or manufacturer

Question 13

scavenge air flow

Answer 13

measure of the quantity of air used to remove the collected dust from a precleaner

Question 14

static pressure

Answer 14

pressure in a duct, at the observed air flow rate, measured by connecting a pressure gauge to a hole or holes drilled in the wall of the duct

Question 15

restriction

Answer 15

statec pressure measured immediately downstream of the unit under test

Question 16

differential pressure

Answer 16

difference in static pressure measured immediately upstream and downstream of the unit under test

Question 17

pressure loss

Answer 17

measure of the loss of energy caused by an air cleaner at the observed air flow rate

Question 18

absolute filter

Answer 18

filter downstream of the unit under test to retain the contaminant passed by the unit under test

Question 19

efficiency

Answer 19

ability of the air cleaner or the unit to remove contaminant under specified test consitions

Question 20

capacity

Answer 20

quantity of contaminant removed by unit under test in producing specified terminal conditions

Question 21

oil carry-over

Answer 21

appearance of oil at the cleaner outlet

Question 22

test terminal condition

Answer 22

condition, relating to an air cleaner, the occurrence of which signifies the end of the test

Question 23

automotive application

Answer 23

air cleaner generally used for internal combustion engines in passenger cars

Question 24

industrial application

Answer 24

air cleaner generally used for internal combustion engines in heavy-duty trucks, construction equipment and agricultural tractors