Leak Testing

Question 1

Equivalent to pressure times volume divided by time

Answer 1

Leakage rate

Question 2

Unit measure for leakage rate

Answer 2

SI

Question 3

Term requires at the leakage flow be too small to be detected

Answer 3

Leaktight

Question 4

A measure of concentration or flow rate of tracer gas that gives a minimal measurement leak signal

Answer 4

Leak detector sensitivity

Question 5

Refers to the minimum detectable amount of leakage that will occur in the specific period of time under specified leak test conditions

Answer 5

Leak test sensitivity

Question 6

Leak testing can be divided into three main categories:

Answer 6

Leak detection, leak location, and leak measurement

Question 7

Two classifications of leakage rate measurement techniques involving the use of tracer gases are

Answer 7

Static and dynamic leak testing

Question 8

The chamber into which the trace gas leaks in accumulates is sealed and is not subjected to pumping to remove the accumulated gases

Answer 8

Static leak testing

Question 9

The chamber into which tracer gas leaks is pump continuously and intermittently to draw the leaking tracer gas through the leak detector instrumentation

Answer 9

Dynamic leak testing

Question 10

Directs sniffing with no significant halogen contamination in the atmosphere

Answer 10

Method A

Question 11

Direct sniffing with significant halogen contamination in the atmosphere

Answer 11

Method B

Question 12

Shroud test (halogen leak testing)

Answer 12

Method C

Question 13

Accumulation test

Answer 13

Method E

Question 14

Air curtain shroud test

Answer 14

Method D

Question 15

Mode of gas flow that occurs in leaks leaking at atmospheric or higher pressure under pressure testing conditions

Answer 15

Viscous flow

Question 16

Mode gas flow that usually occurs in leaks under vacuum testing conditions

Answer 16

Molecular flow

Question 17

Mode of gas flow that occurs under test conditions immediate between vacuum and pressures higher than atmospheric pressure

Answer 17

Transitional flow

Question 18

The most sensitive leak testing technique is

Answer 18

Mass spectrometer test

Question 19

Leak testing establishes differential pressure’s between

Answer 19

Test object and environment

Question 20

Assuming no significant leakage, if the temperature increased during a pressure dropped leak test, the pressure in the system under the test would

Answer 20

Increase

Question 21

If the sensitivity of the halogen leak detector is constant throughout the test then

Answer 21

The instrument in test procedure were capable of detecting leakage of a certain size during the test

Question 22

All leak detection methods are dependent upon

Answer 22

Gas or fluid flow

Question 23

The release of gas for materials in a vacuum is best defined as

Answer 23

Outgassing

Question 24

Used for leak location and leak rate

Answer 24

Halogen diode detector

Question 25

This property would not affect the performance of a bubble solution

Answer 25

Contrast